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== Treadmill Repair ==
===Simple Latch MOSFET===

* [https://www.youtube.com/watch?v=maw1yFxSSjA 271 How to Repair Circuit for TreadMill - Circuit Explained /Troubleshooting] - Check MOSFET
* [https://www.youtube.com/watch?v=Xrs_5MaGjEc Troubleshooting and Repair of an MC-2100 Including common Component Failure and Diagnosis]
* [https://www.youtube.com/watch?v=NMDy7TKdq8Y How To Repair Treadmill Control Board] - Indian

* [https://www.youtube.com/watch?v=NUOCo01qARE Parts Lists & Links for Building Your Own Treadmill Motor Power Supply]

=Misc=
[https://youtu.be/NS8Q9LUIKA8?t=649 Vellum Paper] instead of transparencies.

=Quick Links=
[http://www.ebay.com.au/chp/Electronic-Components-/182412 EBay Electronic Components]

[http://www.ebay.com.au/myb/PurchaseHistory?scrollto=2749#PurchaseHistoryOrdersContainer?ipp=100&radioChk=1&Period=1&Filter=9&cmid=2749&_trksid=p2057872.m2749.l4676&melid=itemspp Ebay Awaiting Feedback]

[http://www.ebay.com.au/myb/PurchaseHistory?_trksid=p2060353.m2034.l3391#PurchaseHistoryOrdersContainer?ipp=100&Period=2&cmid=2749&_trksid=p2057872.m2749.l5116 Ebay Purchase History]

==Converters/Calculators==
* [http://www.unit-conversion.info/electrical-resistance.html Resistance Ω's converter]
* [http://www.unit-conversion.info/capacitance.html#data Capacitance converter (Farads)]
* [https://www.powerstream.com/Wire_Size.htm AWG Wire Guage vs AMPs]

==Stores==
[http://www.chonelectronics.com/ Chonelectronics] - Based in Thailand. Slow shipping but seem cheap. Recommended on Instructables (but from old 2009 post)

[https://www.reddit.com/r/electronics/wiki/parts Reddit Wiki Parts] - Lists some...

=Misc=
* [http://translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fhabrahabr.ru%2Fpost%2F152052%2F Bit banging an Atmel AVR via SPI]
* "Delamination temperature is around 300 - 320°C for a regular FR-4 Tg135 material, so you shouldn't go over that. If you do, then reduce the time of soldering as much as you can. Otherwise you risk lifting the pads or breaking the vias. There are better materials with higher temps, like FR-4 Tg180, with Td over 350°C, but they are more expensive and not much common."

=RISC-V=
* [https://www.cnx-software.com/2019/08/29/longan-nano-gd32v-risc-v-development-board-comes-with-lcd-display-and-enclosure/ $5USD RISC-V with LCD and Case]
* [https://www.cnx-software.com/2019/10/28/gd32v-risc-v-development-kit-lcd-seeed-studio/ A 103Mhz board] - [https://www.seeedstudio.com/SeeedStudio-GD32-RISC-V-Dev-Board-p-4302.html $6.90 (without LCD)], [https://www.seeedstudio.com/SeeedStudio-GD32-RISC-V-kit-with-LCD-p-4303.html $15.90 with LCD]

=General Infos=

* [http://www.talkingelectronics.com/pay/BEC-2/Page49.html Schmitty trigger stuff]
* [http://electronicsclub.info/74series.htm 74 Series Logic ICs]

* [http://www.ti.com/lsds/ti/logic/and-gate-products.page# TI Logic Components]
* [http://www.vishay.com/mosfets/n-channel/ Vishay Mosfets]
* [https://www.electronics-related.com/showarticle/289/10-circuit-components-you-should-know]. 74LVC1G97 and 74LVC1G98. TL431

* [https://hackaday.com/2016/12/09/diodes-the-switch-you-never-knew-you-had/ Diode Logic]
* [https://hackaday.com/2015/12/10/esoteric-actuators/ ESOTERIC ACTUATORS]
* [http://pcbmode.com/ PCBModE], [https://www.boldport.com/ BoldPort]
Wood's Metal (toxic but cheap) and Field's Metal (not toxic, but more expensive) can be used as an alternative to ChipQuik. Also look into Rose's metal... Wikipedia lists Cerrosafe as differnt to Wood's metal but youtuber called it the same thing.
* [https://hackaday.com/2015/01/13/cheap-diy-microscope-sees-individual-atoms/ CHEAP DIY MICROSCOPE SEES INDIVIDUAL ATOMS] - [https://hackaday.com/2015/08/22/building-an-atomic-force-microscope-on-the-cheap/ ATOMIC FORCE MICROSCOPE ON THE CHEAP] - [https://hackaday.com/2015/09/30/teeny-tiny-very-small-atomic-resolution-and-the-home-hobbyist/#more-171518 ATOMIC RESOLUTION AND THE HOME HOBBYIST]
* [http://frontdoor.biz/HowToPCB/HowToPCB-Schematics.html How to PCB]
* [http://electronicdesign.com/boards/555-best-ic-ever-or-obsolete-anachronism 555 timer alternatives]

=Mosfet=
* P CHANNEL MOSFET. (Load connected between Drain and Ground)
* N CHANNEL MOSFET.(Load connected between Drain and +V)

=KiCad=
* [https://www.youtube.com/watch?v=8vvTiHNzfnA YouTube Tutorials]

=Projects=
==Sunrise Alarm Clock==
'''Status:'''

* Was waiting on DC power jacks, copperplate boards and PCB drills that have arrived. Everything should be ready if etching works ok.
* Need to figure out which power supply to use (Bladeless Fan one?) and attach DC jack.
* Basic proof of concept ESP12-F program that gets the time via wifi seems to be ok. Arduino IDE sucks balls, need something that is unit-testable.
* Low power mode for ESP12F?
* ESP12F's keep dying and wifi OTA flashing is crap.
* Need to etch a custom PCB with an ESP12F socket and UART ports.
* Need to design the PCB in KiCad and get footprints for various things. MiniJST connectors.
* Need to future proof the design for expansion of other ideas.
* Soldered LEDs to the base but probably want to redo them to allow for individual addressing. This will let one light turn on at a time, needed because the lights have a minimum forward voltage, meaning a minimum brightness.

'''Ideas:'''
* Add screen to give time.
* Add light sensor to make sure the screen is off at night (if it is a lit screen).
* IR Motion sensor? Wave hand to turn on light?
* Blue lights for morning waking?
* Red lights for nighttime sleepy?

==DSO138==
'''Status:''' Managed to compile the opensource version and upload it to the device. The opensource uses the old R11 resistor value. Need to port the new resistor value to the opensource version. Currently radare2 sucks as reverse engineering the ARM thumb instructions. Heaps of the oscilloscope code is behind a binary blob.

stm32flash -v -b 115200 /dev/ttyUSB0 -w 113-13801-061.hex
r2 ../src/firmware-src/libdso138.a -b16 -aarm -AA

* "Supports two types of TFT controllers (ILI9341 and ILI9325/9328)."
* Mine is a ILI9341...
* CPU is: [http://www.st.com/en/microcontrollers/stm32f103c8.html STM32F103C8]. Does not support DFU (usb bootloader).

* [https://www.youtube.com/watch?v=cvKC-4tCRgw Calling the STM32 SystemMemory Bootloader from your application]
* [https://www.youtube.com/watch?v=ZUXuk2zFHfs how to use STM32 system memory boot modes]
* [https://stackoverflow.com/questions/26891432/jump-to-bootloader-in-stm32-through-appliction-i-e-using-boot-0-and-boot-1-pins StackOverflow Question]
* [https://github.com/libopencm3/libopencm3-examples libopencm3/libopencm3-examples]
* [https://github.com/libopencm3/libopencm3 libopencm3/libopencm3]
* [http://tty.uchuujin.de/2016/02/stm32-from-scratch-bare-minimals/ Post on bare STM32 dev]
* [https://henryomd.blogspot.com/2016/07/usb-hid-on-stm32f042.html USB HID on STM32F042]
* [https://developer.mbed.org/users/mega64/code/mbed-STM32F103C8/diff/e3d4af315dd8/targets/cmsis/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F042K6/cmsis_nvic.c This might be about the bootloader...]
* [https://github.com/xobs/grainuum Grainuum] Software USB stack for Cortex M0+ [https://www.youtube.com/watch?v=G_tdJ9Lu7Zk33c3 No USB? No problem.]
* [https://github.com/lemcu/LemcUSB LemcUSB] - A purely software based USB peripheral for ARM Cortex M0+ devices

==GP2Y1010AU0F Dust Sensor==
'''STATUS:''' Build a basic prototype with Arduino that returns numbers. Need a standalone long term version for datalogging.

GP2Y1010AU0F - [https://www.sparkfun.com/datasheets/Sensors/gp2y1010au_e.pdf DataSheet] [https://cdn.sharpsde.com/fileadmin/products/Optoelectronics/Sensors/Specs/GP2Y1010AU0F_20Jul07_Spec_ED-05G124B.pdf Alt DataSheet]

[http://arduinodev.woofex.net/2012/12/01/standalone-sharp-dust-sensor/ Example Arduino Usage] + [https://github.com/Trefex/arduino-airquality/tree/master/Module_Dust-Sensor github] - Apparently 3.3v isn't enough for the full range, but might be ok for real world usage... Having said that, powering it from 5v USB would be easiest. Is it possible to hijack a USB 3.3v data line for power?

[http://www.instructables.com/id/How-to-Interface-With-Optical-Dust-Sensor/ Instructables] - Mentions a 150Ω resistor and a 220nF capacitor.

[http://www.arduino.org/learning/tutorials/boards-tutorials/sharp-dust-sensor-gp2y1010au arduino.org tutorial] - Has a capacitor and resistor.

[http://www.howmuchsnow.com/arduino/airquality/ howmuchsnow.com] - Includes some air quality stuff.

<img src="https://cdn.instructables.com/FV7/AEZH/IQHIURV5/FV7AEZHIQHIURV5.MEDIUM.jpg"/>

<img src="https://cdn.instructables.com/F95/2YUH/IQHIUL3I/F952YUHIQHIUL3I.MEDIUM.jpg"/>

==ESP-12F Programmer==
'''STATUS:''' Have build the physical board to socket ESP12F's. The Red FTDI programmer is partially dead but can be used. Auto flashing without a manual reset wasn't working. ESP12F's keep dying and reliable flashing is fucked. Probably due to shitty flash memory.

[https://blog.attachix.com/live-debugging-with-open-source-tools-programming-for-esp8266-part-4/ Live debugging for ESP8266]

[https://github.com/esp8266/Arduino/blob/master/doc/boards.md#generic-esp8266-modules Bootloading/Usage pinouts...]

[https://github.com/pfalcon/esp-open-sdk/blob/master/examples/blinky/Makefile Blinky Makefile]
[https://github.com/anupak/esp8266-samplecode Examples]
[http://git.spritesserver.nl/ Some other examples]

[https://hallard.me/esp8266-autoreset/ Alternative auto reset, with capacitors...

[http://visualgdb.com/tutorials/esp8266/ JTAG Info]


* LM1117t Pins - Gnd Out In
* S9013 - EBC

[http://www.arduinesp.com/blink FT232 with Transistor Pin out] [http://www.arduinesp.com/getting-started parent] [http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0AL+656+304+720+304+0+0+false+5+0%0AL+656+400+720+400+0+0+false+5+0%0At+560+304+512+304+0+1+9.499948665035505e-19+0+100%0At+576+400+512+400+1+1+1.4592484383544339e-18+0+100%0Ar+656+304+560+304+0+12000%0Ar+656+400+576+400+0+12000%0Aw+656+304+656+336+0%0Aw+512+384+512+368+0%0Aw+512+320+512+336+0%0Aw+512+368+656+336+0%0Aw+512+336+656+368+0%0Aw+656+368+656+400+0%0Aw+512+288+448+288+0%0Aw+512+416+448+416+0%0AM+368+288+320+288+0+2.5%0AM+368+416+320+416+0+2.5%0Aw+368+416+448+416+0%0Aw+368+288+448+288+0%0A CJS] - Does this need pull ups/downs?

Pins:
* EN - Always must be high.
* GPIO15 - Always must be low (Unless booting from SD card...).
* RST - Normally high? It's getting pulled down by UART... Maybe it's a Schmidt trigger... Seems to bootloop forever when pulled low, but only after the FTDI activates it. FTDI Pulls it low then high.
* GPIO0 - Boot Pin. High when normal. Low for bootloader.

On pulling resistors "[http://www.instructables.com/id/ESP8266-Using-GPIO0-GPIO2-as-inputs/step2/GPIO0-GPIO2-and-GPIO15-pins/ A 2K resistor gives better noise immunity.]"

"[http://www.esp8266.com/viewtopic.php?f=13&t=2499 esptool uses the RTS and DTR modem status lines to automatically enter the bootloader. Connect RTS to CH_PD (which is used as active-low reset) and DTR to GPIO0.]"

[https://github.com/espressif/esptool esptool guide]

===Flash Memory===
Manufacturer: e0
Device: 4016

e0 is unknown manufacturer
4016 indicates 4MiB (32Mbit).

"BergMicro BG25Q32 32Mbits"

===Chip ID===
Chip ID: 0x002c260b

==ESP as programmer==
Look into [https://github.com/jeelabs/esp-link esp-link].

* [https://github.com/jeelabs/esp-link/blob/master/UC-FLASHING.md ESP-Link Info]
* [https://github.com/beckdac/ESP8266-transparent-bridge ESP8266-transparent-bridge]

==Multi-meter RGB mod==
'''STATUS:''' Mounted RGB LEDs onto the multimeter frame. But no control circuitry. Was going to use an Digispark but a ESP12f might be better since I can program it wireless. Except they keep dying on me. The Current RGB LEDs require 6 lines of PWM if I want individual colours. Have some WS2812B's that might work instead.

==DIY Multi-meter==
'''STATUS:''' Planning

* [https://hackaday.io/project/11296-usb-multimeter]
* uGFX + ChibiOS
* [http://www.ti.com/product/INA219 INA219] - INA219 26-V, Bidirectional, Zero-Drift, High-Side, I2C Out Current/Power Monitor - Breakout boards are like $4 on ebay.
* [http://www.ti.com/product/INA226 INA226] - 36-V, Bi-Directional, Ultra-High Accuracy, Low-/High-Side, I2C Out Current/Power Monitor w/ Alert. - Boards are like $8 on ebay.
* [http://www.ti.com/product/INA333 INA333] -
INA333 Micro-Power (50μA), Zerø-Drift, Rail-to-Rail Out Instrumentation Amplifier. Listed on ebay for $6, but other listing are $216 o_O, $35 and $13. Seems there is a huge range...

* [https://www.youtube.com/watch?v=zUhnGp5vh60 EEVblog #373 - Multimeter Input Protection Tutorial]
* [https://www.youtube.com/watch?v=yuCXsT3_WRE EEVblog #853 - How A Multimeter Works]

==Repair==
===Dell 2504FPW===
* [https://www.youtube.com/watch?v=SZE_R8CPtM0 Opening]
* [https://www.youtube.com/watch?v=rQwCqatbLr4 PSU repair]

=Capacitors=
[https://electronics.stackexchange.com/questions/18384/why-does-the-lm1117-data-sheet-specifically-specify-tantalum-capacitors This info on LM1117 capacitors...].

* The minimum output capacitance required by the LM1117 is 10µF...
* The ESR of the output capacitor should range between 0.3Ω - 22Ω.
* [http://www.icbase.com/pdf/CHI/CHI00030812.pdf The ESR of the output capacitor should be less than 0.5Ω].
* Tantalums were specified because Electrolytic can have their ESR increase up to 30x on very low temps.


[https://electronics.stackexchange.com/questions/200565/capacitors-for-ams1117-for-5v-to-3-3v-regulation Info on the AMS1117 caps...]

I have:
* [http://www.ebay.com.au/itm/262589948964?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Polyester Film] (YELLOW) - 1nF->470nF @ 100 Volts
* [http://www.ebay.com.au/itm/141981170892?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Polyester Film] (Green) - 1nF->68nF @ 630 Volts
* [http://www.ebay.com.au/itm/131917923986?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT CBB Polypropylene Metal Film] (Brown & Blue) - 1nF->2200nF @ 630 Volts
* [http://www.ebay.com.au/itm/111905630137?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT 0402 SMD Ceramic] - 1pF->0.033uF @ 50 Volts
* [http://www.ebay.com.au/itm/262690024291?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT 0805 SMD Ceramic] - 1pF-22uF (ON ORDER).
* [http://www.ebay.com.au/itm/152190605960?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT SMD Aluminum Electrolytic Capacitor Assorted] - 1uF-220uF (Various voltages, 16-63)
* [http://www.ebay.com.au/itm/300Pcs-Ceramic-Capacitor-Assortment-30-Values-Diy-Ic-New-Develope-E-/291740870748?hash=item43ed1c685c:g:S5AAAOSwMVdYHbCe Ceramic Capacitors] - 3p->100nf
* [http://www.dx.com/p/6981-plastic-copper-electrolytic-capacitors-for-diy-project-black-white-120-piece-pack-173957 Plastic + Copper Electrolytic Capacitors] - 1uF->470uF (Some says ESR is low...)

Maybe get some non-SMD MLCCs? Tantalums?

<img src="http://i.stack.imgur.com/3be6x.png"/>

=PCB Etching=
* [http://www.instructables.com/id/Stop-using-Ferric-Chloride-etchant!--A-better-etc/ Better then Ferric Chloride] - Hydrochloric Acid (Muriatic Acid) - ~31.45%, %10 might be ok too... hydrogen peroxide, 3%... Also need Acetone for removing stuff afterwards...
* [http://www.instructables.com/id/Is-the-best-PCB-etchant-in-every-kitchen-/ hydrogen-peroxide, vinegar & salt]
* [https://www.youtube.com/watch?v=43Xsh9J7S-g Make Ferric Chloride] - Make Ferric Chloride from Iron (old rusty nails) 100mL of water and 100mL of 12M hydrochloric acid. Once the ferrous chloride solution is made it needs to be oxidized to ferric chloride. The fast way of doing this is to add 200mL of 3% hydrogen peroxide.
* [http://www.instructables.com/id/The-Saltwater-etch-process/step13/Draw-around-the-pads-with-a-sharp-instrument/ Marker and Saltwater] - Inverse boards. Remove only the bit's you don't want connected...
* [http://www.ebay.com.au/itm/PCB-Etching-Kit-to-etch-a-circuit-board-New-/262403095846?hash=item3d18717d26:g:A2EAAOSwEzxYTG8W This Kit] - "100g Sachet of Sodium Persulphate etchant", "Positive Developer for Riston"
* [https://web.archive.org/web/20060822061531/http://members.optusnet.com.au/~eseychell/PCB/etching_CuCl/index.html Etching with Air Regenerated Acid Cupric Chloride] - Science!
* [http://www.opencircuits.com/Chemical_Etchants] - This site.
* [https://www.youtube.com/watch?v=HBIxvwZ_0og Heatless (cold) Toner Transfer (for PCB)] - Asatone+Ethanol
* [https://hackaday.com/2012/12/10/10-ways-to-etch-pcbs-at-home/ NurdRage]
* [https://www.youtube.com/watch?annotation_id=annotation_614533555&feature=iv&src_vid=Rf5HBLzDGQA&v=rj4qe6bdu7k Glass boards]
* [https://www.youtube.com/watch?v=mwwA1d2s2OQ No-etch circuit boards with your laser printer] - Silver Adhesive directly on toner.
* [https://www.youtube.com/watch?v=sNh0ubRcTYU 3D printer etching]
* [http://forum.allaboutcircuits.com/threads/project-photographic-methods-of-making-pcbs.107696/ PCB UV Info]

==Protoboarding==
* [http://www.instructables.com/id/How-to-Prototype-Without-Using-Printed-Circuit-Boa/step4/Connect-the-components-using-Kynar-wire/ how to]
* [https://www.sparkfun.com/products/12070 This sparkfun solderable breadboard seems neat (but too expensive...)]

=Misc=
* [http://www.tigoe.com/pcomp/code/arduinowiring/486/ Controlling Lots of Outputs from a Microcontroller] and lost of other's on the blog.
* [https://www.mikrocontroller.net/articles/AVR_Transistortester#Introduction_.28English.29 Transistor Tester]
* [http://www.electronics-tutorials.ws/diode/bypass-diodes.html solar panel bypass diode]
* http://fritzing.org/

=Oscilloscopes/ADC/DAC/stuff=
[https://www.youtube.com/watch?v=iqfm1pN2Uac FNIRSI 1014D vs OWON SDS1104 vs Hantek DSO2D10 ⭐ Entry Level Oscilloscope Showdown!]
{| class="wikitable sortable"
! Name || Mhz || Cost || Type || Description
|-
| Hantek 6022BE || 20MHz || USD$58.20 (85.7364) || USB || Not sure if it's isolated, but worse than the OWEN...
|-
| OWEN Vds1022 || 25Mhz || $89 || USB || No isolation = blown up computer
|-
| OWEN Vds1022I || 25MHz || $135 || USB || 2 ch. Linux support is vague...
|-
| PicoScope 2204A || 10Mhz || $252.30 (maybe $147+shipping) || USB || Why would anyone buy this over the OWEN?
|-
|[http://my.bitscope.com/store/?p=view&i=item+3 BitScope 10] || 100Mhz || $245 USD. (AUD$361.179) || USB || 2ch + logic analyzer
|-
| Hantek DSO5102P || 100Mhz || AUD$366.649 ($346.00 used, delivered) || Real || Decent but more than I was looking for...
|-
|Hantek DSO2C10
|100Mhz
|AU$350, [https://www.aliexpress.com/item/1005003764794943.html?spm=a2g0o.productlist.main.5.14387ee948RMC9&pdp_ext_f=%7B%22sku_id%22%3A%2212000027088917907%22%7D&pdp_npi=3%40dis%21AUD%21464.04%21273.79%21%21%21%21%21%40212279b716774852489332142d0713%2112000027088917907%21sea%21AU%214431516228&curPageLogUid=aIVdnwKWvQLT $278 from Aliexpress]
|Real
|Can be [https://www.eevblog.com/forum/testgear/hacking-the-dso2x1x/ 'hacked' to 150Mhz version]?
|-
| Rigol DS1054Z || 50Mhz (hackable to ~135Mhz) || USD$339 + shipping || Real || Probably better than the hantek with the hack...
|-
| Rigol DS1202Z-E || 200 MHz (maybe hackable too?) || USD$349.00 + shipping || Real || Why would anyone get a 1054 over this?... No shupping to AUS...
|-
| Rigol DS1102E || 100MHz (maybe hackable to higher?) || USD$363.62 + USD$36.93 || Real || $259.00 without probes, cables, manuals (might be best to buy better probes anyway, but not sure of prices and what other cables would be)...
|-
| OWON SDS1102 || 100MHz || USD$249.00 +shipping || Real ||
|-
| [https://www.amazon.com/Siglent-Technologies-SDS1102CML-Digital-Oscilloscope/dp/B01J1MQC3G/ref=pd_sbs_328_1/142-5456145-0704005?_encoding=UTF8&pd_rd_i=B01J1MQC3G&pd_rd_r=a7d131a2-e81c-4203-816c-22bb1bf31441&pd_rd_w=xFp2j&pd_rd_wg=3pM4d&pf_rd_p=5873ae95-9063-4a23-9b7e-eafa738c2269&pf_rd_r=C6KS23AKGXCYNCY3KM7T&psc=1&refRID=C6KS23AKGXCYNCY3KM7T Siglent Technologies SDS1102CML+] || 100Mhz || USD$299+shipping || Real || ???
|-
|Siglent SDS-1152CML
|150MHz
|[https://www.ebay.com.au/itm/333996248449?hash=item4dc3ba4d81:g:InMAAOSw3RBgmNcR&amdata=enc%3AAQAHAAAAoDHAVN7GnaaCRk7FPhmxBu8IlBl9CS5%2B5bgtybKk09BiPIxc5Ow5onsY6wW5FymMNmHogh1Fr5vJjh1MpVHPv9TPxsNAJ96OihX%2BV7jhy2daNavV%2F%2FmxtgFSXptDd9wRix3mvbg7VNJN66j0wOrvZ8pKX8eSZBdAoqt%2B7UGLJgFQfbqdKwD9TMC8otV1racPB4rVrgC%2FZbUjt9%2FJYPfRhhg%3D%7Ctkp%3ABk9SR5LTxKDSYQ $398.00]
|
|Only one, old model?
|}


* [https://www.youtube.com/watch?v=SIH48bIUU00 EEVblog #1260 - $70 100MHz Oscilloscope?] - Only about 40Mhz?...


* [http://au.mouser.com/ProductDetail/Analog-Devices-Hittite/HMCAD1511/?qs=3izLlwrMQ7kObuabPwqzUg%3D%3D HMCAD1511] - Highspeed, 8bit ADC 4channel. - $96.14
* [http://www.nxp.com/documents/data_sheet/74HC_HCT4053.pdf HC4053M] - High Speed CMOS Logic Analog Multiplexers/Demultiplexers - < $1
* [Mcp4725] - Cheap 12-Bit Digital to Analogue converter. [http://www.ebay.com.au/itm/Development-Board-12Bit-Resolution-I2c-Mcp4725-Dac-Breakout-Diy-Ic-New-Develop-Z/301988856898?_trksid=p5713.c100284.m3505&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D12%26asc%3D20140905073823%26meid%3D70ae464a12ce456fb678870a1de9a886%26pid%3D100284%26rk%3D2%26rkt%3D10%26sd%3D301988856898 $1.50 boards on ebay from Foosoo].

* [http://www.analog.com/en/products/digital-to-analog-converters/precision-dac/digital-potentiometers/ad5207.html AD5207] - 2-Channel, 256-Position Digital Potentiometer SPI. $14-$30.
* [http://www.analog.com/media/en/technical-documentation/data-sheets/AD5204_5206.pdf AD5206] - [http://www.ebay.com.au/itm/AD5206BRU10-TSSOP24-4-6-Channel-Digital-Potentiometers-/360695868639?hash=item53fb262cdf:g:wNsAAOSwBvNTpVfU $4 each (+$4 ship)], [http://www.ebay.com.au/itm/1PCS-Digital-Potentiometers-IC-TSSOP24-AD5206BRUZ10-AD5206BRU10-AD5206B10-AD5206-/401025032263?hash=item5d5ef46047:g:7CYAAOSwYHxWKi3n $4.40ech (freeship)] (Why are these so much cheaper than above?) - 6-Channel Digital Potentiometers

* [http://www.analog.com/media/en/technical-documentation/data-sheets/AD9288.pdf AD9288] - 8-Bit, 40/80/100 MSPS Dual A/D Converter ~$14 on ebay. [http://au.rs-online.com/web/p/general-purpose-adcs/8049832/ $7.50 on rs-online]. Was on the [https://www.youtube.com/watch?v=sO5iGwHpmHc DS1052E Rigol]. Overclocked 40ms/s to 100ms/s
* http://www.electronhacks.com/2012/01/diy-arduino-oscilloscope-with-the-nokia-3310-glcd-screen/
* AD9883. 3ch 110msps but cost the same as the ad9288... [https://electronics.stackexchange.com/questions/233925/is-an-adc-with-a-serial-interface-slower-than-a-parallel-one-both-having-same-s parallel not serial] interface. [http://au.rs-online.com/web/c/?sra=oss&r=t&searchTerm=AD9883 $8.12 @ rs-online].

* http://jeelabs.org/2010/11/21/bleep/index.html
* http://jeelabs.org/2010/11/23/100-khz-dso/
* https://en.wikipedia.org/wiki/Resistor_ladder
* https://en.wikipedia.org/wiki/Flash_ADC

* [https://www.youtube.com/watch?v=8BZiBRs9xj0&list=PL53A0673C56D8C132 Precision Voltage References] - AD581KH 10V, AD586JN 5V, ADR130 V-Ref Programmable 0.5V/1V 4mA, ISL21009BFB850Z V-Ref Prec,5.0V,7mA
ISL21009BFB812Z V-Ref Prec,1.25V,7mA
REF5050AID 5.0V Voltage Reference
REF102 V-Ref Precision 10V 10mA

==GPIO Expanders==
PCF8574 - 8 bit I²C. 100khz. [http://www.ebay.com.au/itm/10Pcs-PCF8574P-PCF8574-DIP-16-NXP-PHI-Remote-8-bit-I-O-Expander-IC-new-/191903627936?hash=item2cae58faa0:g:5r0AAOSw5dNWrwug EBAY 10 DIP style, for $5]. [http://www.ebay.com.au/itm/5PCS-IC-PHILIPS-PCF8574T-PCF8574AT-SOP-16-/131803029473?hash=item1eb0129fe1:g:SR0AAOxyuR5TY0Wd EBay has SMD 5pcs for $5] [http://au.rs-online.com/web/c/semiconductors/interface-ics/i-o-expanders/?searchTerm=PCF8574&h=s&sra=oss&redirect-relevancy-data=636F3D3126696E3D4931384E4B6E6F776E41734D504E266C753D656E266D6D3D6D61746368616C6C7061727469616C26706D3D5E5B5C707B4C7D5C707B4E647D2D2C2F255C2E5D2B2426706F3D313326736E3D592673743D4B4559574F52445F53494E474C455F414C5048415F4E554D455249432677633D424F5448267573743D50434638353734267374613D5043463835373426#sort-by=P_breakPrice1&sort-order=asc RS Online has SMD for $0.886ech ($4.43 for 5)]

PCF8575 - 16bit. RS SMD for $2.421. 400khz.

FXL6408UMX - Slightly cheaper than the PCF8574 and 400khz freq. $0.819 each on RS (min order, 10 for $8.19).

MCP23S17/MCP23017 - i/o expanders (shift registers?). Once is I²C the other is SPI. [http://www.ebay.com.au/itm/5Pcs-Spi-16B-Mcp23s17-E-Sp-I-O-Expander-28Sdip-Develope-New-Diy-Ic-Q-/291616509027?hash=item43e5b2cc63:g:pfUAAOSw5cNYHUSC Foosoo has 5 DIP style S for $6.27] and [http://www.ebay.com.au/itm/5Pcs-Mcp23017-Mcp23017-E-So-I-O-Expander-I2c-16Bit-28Sop-Develope-Diy-Ic-New-Y-/351628784341?hash=item51deb572d5:g:MFkAAOSw4GVYIKkn Mcp23017, 5 for $5.51]

=Simple Latch MOSFET=
[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0AR+384+176+384+128+0+0+40+5+0+0+0.5%0Aw+384+272+384+304+0%0Aw+384+272+400+272+0%0Ar+384+304+384+352+0+100000%0Aw+384+352+384+368+0%0Aw+384+368+448+368+0%0Aw+400+272+432+272+0%0Aw+464+272+496+272+0%0Aw+448+304+448+368+0%0Ag+448+464+448+496+0%0Aw+496+384+560+384+0%0Af+448+304+448+272+1+1.5+0.02%0At+480+384+448+384+0+1+-4.102984237977373+0.44112805780292214+100%0Aw+448+400+448+464+1%0Aw+384+272+384+256+0%0Aw+464+224+624+224+0%0Aw+624+256+624+384+0%0Aw+624+384+608+384+0%0As+416+224+464+224+0+1+false%0Aw+496+272+496+336+0%0Aw+480+384+496+384+0%0Aw+496+384+496+336+0%0Ar+608+384+560+384+0+100000%0Aw+384+224+416+224+0%0Aw+384+256+384+224+0%0Aw+624+224+624+256+0%0Aw+384+224+288+224+0%0Aw+288+224+288+400+0%0Aw+288+400+320+400+0%0Aw+384+400+352+400+0%0As+320+400+352+400+0+1+false%0Aw+384+368+384+400+0%0Aw+384+176+384+224+0%0A Example]
[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0AR+384+176+384+128+0+0+40+5+0+0+0.5%0Aw+384+272+384+304+0%0Aw+384+272+400+272+0%0Ar+384+304+384+352+0+100000%0Aw+384+352+384+368+0%0Aw+384+368+448+368+0%0Aw+400+272+432+272+0%0Aw+464+272+496+272+0%0Aw+448+304+448+368+0%0Ag+448+464+448+496+0%0Aw+496+384+560+384+0%0Af+448+304+448+272+1+1.5+0.02%0At+480+384+448+384+0+1+-4.102984237977373+0.44112805780292214+100%0Aw+448+400+448+464+1%0Aw+384+272+384+256+0%0Aw+464+224+624+224+0%0Aw+624+256+624+384+0%0Aw+624+384+608+384+0%0As+416+224+464+224+0+1+false%0Aw+496+272+496+336+0%0Aw+480+384+496+384+0%0Aw+496+384+496+336+0%0Ar+608+384+560+384+0+100000%0Aw+384+224+416+224+0%0Aw+384+256+384+224+0%0Aw+624+224+624+256+0%0Aw+384+224+288+224+0%0Aw+288+224+288+400+0%0Aw+288+400+320+400+0%0Aw+384+400+352+400+0%0As+320+400+352+400+0+1+false%0Aw+384+368+384+400+0%0Aw+384+176+384+224+0%0A Example]


Line 16: Line 331:
[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0AR+336+80+336+32+0+0+40+5+0+0+0.5%0Af+256+144+336+144+8+1.5+0.02%0Ag+336+352+336+384+0%0Aw+336+80+256+80+0%0Aw+336+80+336+128+0%0Aw+336+160+336+224+0%0Ar+256+224+256+144+0+1000000%0Ad+336+224+256+224+1+0.805904783%0As+256+144+256+80+0+1+true%0Ar+336+224+336+288+0+100%0Ad+256+288+256+352+1+0.805904783%0As+256+352+336+352+0+1+true%0Ar+256+224+256+288+0+1000000%0Aw+336+288+336+352+0%0AR+592+112+592+32+0+0+40+12+0+0+0.5%0Aw+592+112+624+112+0%0As+624+112+672+112+0+1+false%0Ag+592+240+592+320+0%0A177+592+112+592+192+0+2.2071199506244366+0.7233502461735934+0.01+0.008199999999999999+50%0As+720+112+784+112+0+1+true%0Ag+832+112+896+112+0%0Ar+832+112+784+112+0+1000%0Aw+720+176+672+176+0%0Ar+592+192+592+240+0+330%0Ar+672+112+672+176+0+500%0Aw+624+208+672+208+2%0Aw+720+176+720+112+0%0Ar+672+112+672+64+0+250%0Aw+672+64+832+64+0%0Aw+832+64+832+112+0%0Ad+672+272+624+272+1+0.805904783%0Aw+624+176+672+176+0%0Ao+25+64+0+35+0.0000762939453125+0.00009765625+0+-1%0A SCR based test]
[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0AR+336+80+336+32+0+0+40+5+0+0+0.5%0Af+256+144+336+144+8+1.5+0.02%0Ag+336+352+336+384+0%0Aw+336+80+256+80+0%0Aw+336+80+336+128+0%0Aw+336+160+336+224+0%0Ar+256+224+256+144+0+1000000%0Ad+336+224+256+224+1+0.805904783%0As+256+144+256+80+0+1+true%0Ar+336+224+336+288+0+100%0Ad+256+288+256+352+1+0.805904783%0As+256+352+336+352+0+1+true%0Ar+256+224+256+288+0+1000000%0Aw+336+288+336+352+0%0AR+592+112+592+32+0+0+40+12+0+0+0.5%0Aw+592+112+624+112+0%0As+624+112+672+112+0+1+false%0Ag+592+240+592+320+0%0A177+592+112+592+192+0+2.2071199506244366+0.7233502461735934+0.01+0.008199999999999999+50%0As+720+112+784+112+0+1+true%0Ag+832+112+896+112+0%0Ar+832+112+784+112+0+1000%0Aw+720+176+672+176+0%0Ar+592+192+592+240+0+330%0Ar+672+112+672+176+0+500%0Aw+624+208+672+208+2%0Aw+720+176+720+112+0%0Ar+672+112+672+64+0+250%0Aw+672+64+832+64+0%0Aw+832+64+832+112+0%0Ad+672+272+624+272+1+0.805904783%0Aw+624+176+672+176+0%0Ao+25+64+0+35+0.0000762939453125+0.00009765625+0+-1%0A SCR based test]


==Pull down to voltage 5 volts==
[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0Ar+80+224+80+160+0+25000%0Ar+128+224+128+160+0+67000%0Ar+32+96+80+96+0+100000%0Aw+80+224+128+224+0%0Aw+128+224+176+224+0%0Aw+176+224+224+224+0%0Aw+80+96+128+96+0%0Aw+128+96+176+96+0%0Aw+176+96+224+96+0%0Ag+224+224+224+272+0%0AR+32+96+32+32+0+0+40+5+0+0+0.5%0Ar+176+224+176+160+0+150000%0Ar+224+224+224+160+0+400000%0AO+272+96+272+32+1%0As+176+96+176+160+0+1+false%0As+224+96+224+160+0+1+false%0As+80+96+80+160+0+1+false%0As+128+96+128+160+0+1+false%0Aw+272+96+224+96+0%0Ar+272+224+272+160+0+10000000%0Aw+272+224+224+224+0%0Aw+272+96+272+160+0%0AR+496+96+544+96+0+0+40+12+0+0+0.5%0AR+352+160+416+160+0+0+40+5+0+0+0.5%0Aw+352+160+352+224+0%0Ad+352+96+352+160+1+0.805904783%0Aw+352+96+384+96+0%0Ar+384+96+432+96+0+1000000%0Ad+352+96+272+96+1+0.805904783%0Ar+272+224+352+224+0+1000000%0As+432+96+496+96+0+1+false%0A Unchained Ladder with 12v]
[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0AR+128+176+64+176+0+0+40+12+0+0+0.5%0Ar+224+256+224+176+0+1000000%0Ar+224+256+304+256+0+200000000%0Ad+224+256+224+320+1+0.805904783%0AO+304+256+368+256+1%0AR+224+320+64+320+0+0+40+5+0+0+0.5%0As+128+176+176+176+0+1+true%0Aw+224+176+176+176+0%0Ag+304+320+352+320+0%0Aw+224+320+256+320+0%0Ar+256+320+304+320+0+100%0Ag+288+176+352+176+0%0Ar+224+176+288+176+0+100000%0A Simple pull down]

===Pull down to voltage 5 volts===
http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0AR+128+176+64+176+0+0+40+12+0+0+0.5%0Ar+224+256+224+176+0+1000000%0Ar+224+256+304+256+0+200000000%0Ad+224+256+224+320+1+0.805904783%0AO+304+256+368+256+1%0AR+224+320+64+320+0+0+40+5+0+0+0.5%0As+128+176+176+176+0+1+true%0Aw+224+176+176+176+0%0Ag+304+320+352+320+0%0Aw+224+320+256+320+0%0Ar+256+320+304+320+0+100%0Ag+288+176+352+176+0%0Ar+224+176+288+176+0+100000%0A


==Resister Ladder==
==Resister Ladder==
Line 29: Line 342:


[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0Ar+96+144+144+144+0+6800%0Ar+144+144+192+144+0+1500%0Ar+192+144+240+144+0+3300%0Ar+240+144+288+144+0+4700%0Ar+288+144+336+144+0+15000%0AR+96+144+32+144+0+0+40+5+0+0+0.5%0AO+144+80+144+32+1%0Ar+144+128+144+80+0+100000000%0Aw+144+128+144+144+0%0As+192+144+192+208+0+1+false%0As+240+144+240+208+0+1+false%0As+288+144+288+208+0+1+false%0As+336+144+336+208+0+1+false%0Aw+192+208+240+208+0%0Aw+240+208+288+208+0%0Aw+288+208+336+208+0%0Ag+336+208+336+256+0%0Aw+144+144+144+224+0%0Aw+96+144+96+224+0%0Ad+144+224+96+224+1+0.805904783%0AR+208+336+272+336+0+0+40+12+0+0+0.5%0Ar+144+336+144+272+0+100000%0As+144+336+208+336+0+1+true%0Aw+144+224+144+272+0%0Ar+384+144+336+144+0+1000000%0Aw+336+208+384+208+0%0Aw+384+208+384+144+0%0A Ladder +12v input]
[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0Ar+96+144+144+144+0+6800%0Ar+144+144+192+144+0+1500%0Ar+192+144+240+144+0+3300%0Ar+240+144+288+144+0+4700%0Ar+288+144+336+144+0+15000%0AR+96+144+32+144+0+0+40+5+0+0+0.5%0AO+144+80+144+32+1%0Ar+144+128+144+80+0+100000000%0Aw+144+128+144+144+0%0As+192+144+192+208+0+1+false%0As+240+144+240+208+0+1+false%0As+288+144+288+208+0+1+false%0As+336+144+336+208+0+1+false%0Aw+192+208+240+208+0%0Aw+240+208+288+208+0%0Aw+288+208+336+208+0%0Ag+336+208+336+256+0%0Aw+144+144+144+224+0%0Aw+96+144+96+224+0%0Ad+144+224+96+224+1+0.805904783%0AR+208+336+272+336+0+0+40+12+0+0+0.5%0Ar+144+336+144+272+0+100000%0As+144+336+208+336+0+1+true%0Aw+144+224+144+272+0%0Ar+384+144+336+144+0+1000000%0Aw+336+208+384+208+0%0Aw+384+208+384+144+0%0A Ladder +12v input]

[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0Ar+80+224+80+160+0+25000%0Ar+128+224+128+160+0+67000%0Ar+32+96+80+96+0+100000%0Aw+80+224+128+224+0%0Aw+128+224+176+224+0%0Aw+176+224+224+224+0%0Aw+80+96+128+96+0%0Aw+128+96+176+96+0%0Aw+176+96+224+96+0%0Ag+224+224+224+272+0%0AR+32+96+32+32+0+0+40+5+0+0+0.5%0Ar+176+224+176+160+0+150000%0Ar+224+224+224+160+0+400000%0AO+272+96+272+32+1%0As+176+96+176+160+0+1+false%0As+224+96+224+160+0+1+false%0As+80+96+80+160+0+1+false%0As+128+96+128+160+0+1+false%0Aw+272+96+224+96+0%0Ar+272+224+272+160+0+10000000%0Aw+272+224+224+224+0%0Aw+272+96+272+160+0%0AR+496+96+544+96+0+0+40+12+0+0+0.5%0AR+352+160+416+160+0+0+40+5+0+0+0.5%0Aw+352+160+352+224+0%0Ad+352+96+352+160+1+0.805904783%0Aw+352+96+384+96+0%0Ar+384+96+432+96+0+1000000%0Ad+352+96+272+96+1+0.805904783%0Ar+272+224+352+224+0+1000000%0As+432+96+496+96+0+1+false%0A Unchained Ladder with 12v]

[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50%0Ar+80+224+80+160+0+27000%0Ar+128+224+128+160+0+68000%0Ar+32+96+80+96+0+100000%0Aw+80+224+128+224+0%0Aw+128+224+176+224+0%0Aw+176+224+224+224+0%0Aw+80+96+128+96+0%0Aw+128+96+176+96+0%0Aw+176+96+224+96+0%0Ag+224+224+224+272+0%0AR+32+96+32+32+0+0+40+5+0+0+0.5%0Ar+176+224+176+160+0+150000%0Ar+224+224+224+160+0+390000%0AO+272+96+272+32+1%0As+176+96+176+160+0+1+false%0As+224+96+224+160+0+1+false%0As+80+96+80+160+0+1+false%0As+128+96+128+160+0+1+false%0Aw+272+96+224+96+0%0Ar+272+224+272+160+0+10000000%0Aw+272+224+224+224+0%0Aw+272+96+272+160+0%0AR+496+96+544+96+0+0+40+12+0+0+0.5%0AR+352+160+416+160+0+0+40+5+0+0+0.5%0Aw+352+160+352+224+0%0Ad+352+96+352+160+1+0.805904783%0Aw+352+96+384+96+0%0Ar+384+96+432+96+0+1000000%0Ad+352+96+272+96+1+0.805904783%0Ar+272+224+352+224+0+1000000%0As+432+96+496+96+0+1+false%0A Unchained Ladder e12 + 12v]


==Complete==
==Complete==
Line 47: Line 364:
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[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+0.11331484530668263+50+5+50%0Aw+32+32+1120+32+0%0Aw+1440+176+1440+304+0%0Aw+80+640+1440+640+0%0Aw+1440+368+1440+640+0%0Aw+1232+336+880+336+0%0Aw+16+144+16+544+0%0Aw+528+544+1360+544+0%0Aw+16+544+16+640+0%0Aw+16+144+256+144+0%0Aw+16+144+16+32+0%0AM+256+96+208+96+0+2.5%0AM+272+128+208+128+0+2.5%0AR+1376+64+1424+64+0+0+40+12+0+0+0.5%0Ag+1296+128+1408+128+0%0Ax+150+136+190+139+0+24+VIN%0Ax+146+104+199+107+0+24+GND%0Ax+164+73+193+76+0+24+5V%0Aw+48+48+224+48+0%0Aw+48+208+48+48+0%0Aw+240+208+240+48+0%0Aw+240+208+48+208+0%0Aw+48+320+48+400+0%0Aw+96+288+96+400+0%0As+48+400+96+400+0+1+false%0Aw+96+464+96+400+0%0Aw+48+496+48+400+0%0Aw+192+464+192+400+0%0Aw+240+464+240+400+0%0As+192+400+240+400+0+1+false%0Aw+240+288+240+400+0%0Aw+192+320+192+400+0%0Aw+480+320+480+400+0%0Aw+528+304+528+400+0%0As+480+400+528+400+0+1+false%0Aw+528+464+528+400+0%0Aw+480+464+480+400+0%0Aw+336+464+336+400+0%0Aw+384+464+384+400+0%0As+336+400+384+400+0+1+false%0Aw+384+288+384+400+0%0Aw+336+320+336+400+0%0Aw+1264+64+1264+32+0%0Aw+1296+128+1296+144+0%0Aw+1296+144+1424+144+0%0Aw+1440+176+1440+32+0%0Aw+1264+32+1440+32+0%0Ar+48+496+48+544+0+27000%0Aw+48+544+16+544+0%0Ar+192+464+192+544+0+68000%0Ar+336+464+336+544+0+150000%0Ar+480+464+480+544+0+390000%0Aw+480+544+368+544+0%0Aw+224+544+192+544+0%0Aw+192+544+80+544+0%0Ab+1305+73+1258+55+0%0Ax+1157+71+1249+74+0+24+Polyfuse%0Aw+1312+64+1264+64+0%0Aw+160+192+160+288+0%0Ar+160+160+160+192+0+1000000%0Aw+160+288+96+288+0%0Aw+160+288+240+288+0%0Aw+304+288+384+288+0%0Aw+384+288+528+288+0%0Aw+528+288+528+304+0%0AL+96+208+96+176+0+1+false+5+0%0AL+128+208+128+176+0+1+false+5+0%0AL+192+208+192+176+0+1+false+5+0%0AL+224+224+224+176+0+1+false+5+0%0AL+64+192+64+160+0+0+false+5+0%0AO+160+160+96+112+1%0AL+304+64+208+64+0+1+false+5+0%0Aw+304+96+304+288+0%0Ar+304+64+304+96+0+100000%0Ar+528+464+528+544+0+10000000%0Aw+480+544+512+544+0%0Af+416+192+464+192+8+1.5+0.02%0Af+512+192+560+192+0+1.5+0.02%0Af+608+192+656+192+8+1.5+0.02%0Af+704+192+752+192+8+1.5+0.02%0Aw+96+272+704+272+0%0Aw+96+208+96+272+0%0Aw+128+208+128+256+0%0Aw+128+256+608+256+0%0Aw+704+192+704+272+0%0Aw+192+240+512+240+0%0Aw+192+208+192+240+0%0Aw+608+256+608+192+0%0Aw+512+240+512+192+0%0Aw+416+192+416+224+0%0Aw+416+224+224+224+0%0Aw+464+176+464+160+0%0Aw+560+176+560+160+0%0Aw+656+176+656+160+0%0Aw+752+176+752+160+0%0Aw+464+160+464+144+0%0Aw+560+160+560+144+0%0Aw+656+160+656+144+0%0Aw+752+160+752+144+0%0Aw+464+144+560+144+0%0Aw+560+144+656+144+0%0Aw+656+144+752+144+0%0Aw+752+144+1216+144+0%0Aw+80+624+80+640+0%0Aw+80+640+32+640+0%0Aw+48+592+752+592+0%0Aw+752+592+752+208+0%0Ar+48+624+80+624+0+1000%0Aw+48+624+48+592+0%0A162+1312+416+1360+416+1+2.1024259+1+1+1+0.01%0Ar+1360+544+1360+496+0+68%0Aw+304+64+848+64+0%0Aw+1216+144+1296+144+0%0Aw+848+288+848+64+0%0As+1312+64+1376+64+0+0+false%0Aw+1408+368+1440+368+0%0Aw+1440+368+1440+336+0%0As+1360+304+1360+368+0+1+false%0Aw+1280+240+1280+304+0%0Aw+1120+32+1264+32+0%0Aw+1360+544+1408+544+0%0Aw+1360+496+1360+416+0%0Aw+1312+416+848+416+0%0Aw+272+128+960+128+0%0Aw+1072+128+1072+176+0%0Aw+1296+112+1296+128+0%0Aw+1296+176+1120+176+0%0Ar+1120+176+1120+224+0+700%0Ag+1120+224+1120+256+0%0Ab+1103+182+1149+277+0%0Aw+1360+336+1440+336+0%0Aw+1120+176+1072+176+0%0Aw+528+288+592+288+0%0Ad+960+288+848+288+1+0.300904783%0Aw+1360+304+1312+304+0%0Aw+1312+320+1008+320+0%0Ar+960+320+1008+320+0+1000000%0Aw+848+288+848+416+0%0Aw+960+288+960+320+0%0Aw+960+320+592+320+0%0Aw+592+320+592+288+0%0Aw+240+288+304+288+0%0Aw+1440+304+1440+336+0%0Aw+1408+368+1360+368+0%0Ad+1312+304+1280+304+1+0.805904783%0A177+1232+208+1280+224+0+1.4496500422602043+0.6960536167073634+0.01+0.0082+50%0Aw+1280+208+1296+208+0%0Aw+1232+336+1232+208+0%0Aw+1232+336+1360+336+0%0Aw+1296+208+1296+176+0%0Aw+1008+128+1072+128+0%0Aw+1312+368+1360+368+0%0Aw+1360+304+1408+304+0%0Aw+1312+320+1312+304+0%0AO+848+64+928+64+1%0Ar+960+128+1008+128+0+100%0Aw+256+144+256+96+0%0Aw+256+144+464+144+0%0A162+80+448+80+496+1+2.1024259+0+0+1+0.01%0Ar+80+496+80+544+0+68%0Aw+224+224+80+304+0%0Aw+80+304+80+448+0%0Aw+80+544+48+544+0%0Ar+224+496+224+544+0+120%0A162+224+448+224+496+1+2.1024259+1+0+0+0.01%0Aw+224+544+336+544+0%0Aw+224+448+224+304+0%0Aw+192+240+224+304+0%0Aw+368+448+368+304+0%0A162+368+448+368+496+1+2.1024259+0+1+0+0.01%0Ar+368+496+368+544+0+120%0Aw+512+448+512+304+0%0A162+512+448+512+496+1+2.1024259+1+1+0+0.01%0Ar+512+496+512+544+0+120%0Aw+512+544+528+544+0%0Aw+368+544+336+544+0%0Aw+128+256+368+304+0%0Aw+96+272+512+304+0%0A s8]

=Negative voltage=
[http://www.allaboutcircuits.com/projects/build-your-own-negative-voltage-generator/]

=FPGA=
ICE40 UL1k


=ICs=
==Negative voltate==
http://www.allaboutcircuits.com/projects/build-your-own-negative-voltage-generator/
[http://www.righto.com/search/label/Z-80 Z-80]

Latest revision as of 20:00, 22 August 2024

Treadmill Repair[edit | edit source]

Misc[edit | edit source]

Vellum Paper instead of transparencies.

Quick Links[edit | edit source]

EBay Electronic Components

Ebay Awaiting Feedback

Ebay Purchase History

Converters/Calculators[edit | edit source]

Stores[edit | edit source]

Chonelectronics - Based in Thailand. Slow shipping but seem cheap. Recommended on Instructables (but from old 2009 post)

Reddit Wiki Parts - Lists some...

Misc[edit | edit source]

  • Bit banging an Atmel AVR via SPI
  • "Delamination temperature is around 300 - 320°C for a regular FR-4 Tg135 material, so you shouldn't go over that. If you do, then reduce the time of soldering as much as you can. Otherwise you risk lifting the pads or breaking the vias. There are better materials with higher temps, like FR-4 Tg180, with Td over 350°C, but they are more expensive and not much common."

RISC-V[edit | edit source]

General Infos[edit | edit source]

Wood's Metal (toxic but cheap) and Field's Metal (not toxic, but more expensive) can be used as an alternative to ChipQuik. Also look into Rose's metal... Wikipedia lists Cerrosafe as differnt to Wood's metal but youtuber called it the same thing.

Mosfet[edit | edit source]

  • P CHANNEL MOSFET. (Load connected between Drain and Ground)
  • N CHANNEL MOSFET.(Load connected between Drain and +V)

KiCad[edit | edit source]

Projects[edit | edit source]

Sunrise Alarm Clock[edit | edit source]

Status:

  • Was waiting on DC power jacks, copperplate boards and PCB drills that have arrived. Everything should be ready if etching works ok.
  • Need to figure out which power supply to use (Bladeless Fan one?) and attach DC jack.
  • Basic proof of concept ESP12-F program that gets the time via wifi seems to be ok. Arduino IDE sucks balls, need something that is unit-testable.
  • Low power mode for ESP12F?
  • ESP12F's keep dying and wifi OTA flashing is crap.
  • Need to etch a custom PCB with an ESP12F socket and UART ports.
  • Need to design the PCB in KiCad and get footprints for various things. MiniJST connectors.
  • Need to future proof the design for expansion of other ideas.
  • Soldered LEDs to the base but probably want to redo them to allow for individual addressing. This will let one light turn on at a time, needed because the lights have a minimum forward voltage, meaning a minimum brightness.

Ideas:

  • Add screen to give time.
  • Add light sensor to make sure the screen is off at night (if it is a lit screen).
  • IR Motion sensor? Wave hand to turn on light?
  • Blue lights for morning waking?
  • Red lights for nighttime sleepy?

DSO138[edit | edit source]

Status: Managed to compile the opensource version and upload it to the device. The opensource uses the old R11 resistor value. Need to port the new resistor value to the opensource version. Currently radare2 sucks as reverse engineering the ARM thumb instructions. Heaps of the oscilloscope code is behind a binary blob. 

stm32flash  -v -b 115200 /dev/ttyUSB0 -w 113-13801-061.hex
r2 ../src/firmware-src/libdso138.a -b16 -aarm -AA
  • "Supports two types of TFT controllers (ILI9341 and ILI9325/9328)."
  • Mine is a ILI9341...
  • CPU is: STM32F103C8. Does not support DFU (usb bootloader).

GP2Y1010AU0F Dust Sensor[edit | edit source]

STATUS: Build a basic prototype with Arduino that returns numbers. Need a standalone long term version for datalogging.

GP2Y1010AU0F - DataSheet Alt DataSheet

Example Arduino Usage + github - Apparently 3.3v isn't enough for the full range, but might be ok for real world usage... Having said that, powering it from 5v USB would be easiest. Is it possible to hijack a USB 3.3v data line for power?

Instructables - Mentions a 150Ω resistor and a 220nF capacitor.

arduino.org tutorial - Has a capacitor and resistor.

howmuchsnow.com - Includes some air quality stuff.

ESP-12F Programmer[edit | edit source]

STATUS: Have build the physical board to socket ESP12F's. The Red FTDI programmer is partially dead but can be used. Auto flashing without a manual reset wasn't working. ESP12F's keep dying and reliable flashing is fucked. Probably due to shitty flash memory.

Live debugging for ESP8266

Bootloading/Usage pinouts...

Blinky Makefile Examples Some other examples

[https://hallard.me/esp8266-autoreset/ Alternative auto reset, with capacitors...

JTAG Info


  • LM1117t Pins - Gnd Out In
  • S9013 - EBC

FT232 with Transistor Pin out parent CJS - Does this need pull ups/downs?

Pins:

  • EN - Always must be high.
  • GPIO15 - Always must be low (Unless booting from SD card...).
  • RST - Normally high? It's getting pulled down by UART... Maybe it's a Schmidt trigger... Seems to bootloop forever when pulled low, but only after the FTDI activates it. FTDI Pulls it low then high.
  • GPIO0 - Boot Pin. High when normal. Low for bootloader.

On pulling resistors "A 2K resistor gives better noise immunity."

"esptool uses the RTS and DTR modem status lines to automatically enter the bootloader. Connect RTS to CH_PD (which is used as active-low reset) and DTR to GPIO0."

esptool guide

Flash Memory[edit | edit source]

Manufacturer: e0 Device: 4016

e0 is unknown manufacturer 4016 indicates 4MiB (32Mbit).

"BergMicro BG25Q32 32Mbits"

Chip ID[edit | edit source]

Chip ID: 0x002c260b

ESP as programmer[edit | edit source]

Look into esp-link.

Multi-meter RGB mod[edit | edit source]

STATUS: Mounted RGB LEDs onto the multimeter frame. But no control circuitry. Was going to use an Digispark but a ESP12f might be better since I can program it wireless. Except they keep dying on me. The Current RGB LEDs require 6 lines of PWM if I want individual colours. Have some WS2812B's that might work instead.

DIY Multi-meter[edit | edit source]

STATUS: Planning

  • [2]
  • uGFX + ChibiOS
  • INA219 - INA219 26-V, Bidirectional, Zero-Drift, High-Side, I2C Out Current/Power Monitor - Breakout boards are like $4 on ebay.
  • INA226 - 36-V, Bi-Directional, Ultra-High Accuracy, Low-/High-Side, I2C Out Current/Power Monitor w/ Alert. - Boards are like $8 on ebay.
  • INA333 -

INA333 Micro-Power (50μA), Zerø-Drift, Rail-to-Rail Out Instrumentation Amplifier. Listed on ebay for $6, but other listing are $216 o_O, $35 and $13. Seems there is a huge range...

Repair[edit | edit source]

Dell 2504FPW[edit | edit source]

Capacitors[edit | edit source]

This info on LM1117 capacitors....

  • The minimum output capacitance required by the LM1117 is 10µF...
  • The ESR of the output capacitor should range between 0.3Ω - 22Ω.
  • The ESR of the output capacitor should be less than 0.5Ω.
  • Tantalums were specified because Electrolytic can have their ESR increase up to 30x on very low temps.


Info on the AMS1117 caps...

I have:

Maybe get some non-SMD MLCCs? Tantalums?

PCB Etching[edit | edit source]

Protoboarding[edit | edit source]

Misc[edit | edit source]

Oscilloscopes/ADC/DAC/stuff[edit | edit source]

FNIRSI 1014D vs OWON SDS1104 vs Hantek DSO2D10 ⭐ Entry Level Oscilloscope Showdown!

Name Mhz Cost Type Description
Hantek 6022BE 20MHz USD$58.20 (85.7364) USB Not sure if it's isolated, but worse than the OWEN...
OWEN Vds1022 25Mhz $89 USB No isolation = blown up computer
OWEN Vds1022I 25MHz $135 USB 2 ch. Linux support is vague...
PicoScope 2204A 10Mhz $252.30 (maybe $147+shipping) USB Why would anyone buy this over the OWEN?
BitScope 10 100Mhz $245 USD. (AUD$361.179) USB 2ch + logic analyzer
Hantek DSO5102P 100Mhz AUD$366.649 ($346.00 used, delivered) Real Decent but more than I was looking for...
Hantek DSO2C10 100Mhz AU$350, $278 from Aliexpress Real Can be 'hacked' to 150Mhz version?
Rigol DS1054Z 50Mhz (hackable to ~135Mhz) USD$339 + shipping Real Probably better than the hantek with the hack...
Rigol DS1202Z-E 200 MHz (maybe hackable too?) USD$349.00 + shipping Real Why would anyone get a 1054 over this?... No shupping to AUS...
Rigol DS1102E 100MHz (maybe hackable to higher?) USD$363.62 + USD$36.93 Real $259.00 without probes, cables, manuals (might be best to buy better probes anyway, but not sure of prices and what other cables would be)...
OWON SDS1102 100MHz USD$249.00 +shipping Real
Siglent Technologies SDS1102CML+ 100Mhz USD$299+shipping Real ???
Siglent SDS-1152CML 150MHz $398.00 Only one, old model?



ISL21009BFB812Z V-Ref Prec,1.25V,7mA REF5050AID 5.0V Voltage Reference REF102 V-Ref Precision 10V 10mA

GPIO Expanders[edit | edit source]

PCF8574 - 8 bit I²C. 100khz. EBAY 10 DIP style, for $5. EBay has SMD 5pcs for $5 RS Online has SMD for $0.886ech ($4.43 for 5)

PCF8575 - 16bit. RS SMD for $2.421. 400khz.

FXL6408UMX - Slightly cheaper than the PCF8574 and 400khz freq. $0.819 each on RS (min order, 10 for $8.19).

MCP23S17/MCP23017 - i/o expanders (shift registers?). Once is I²C the other is SPI. Foosoo has 5 DIP style S for $6.27 and Mcp23017, 5 for $5.51

Simple Latch MOSFET[edit | edit source]

Example

Exaple+Load

Another Example

More

moar2

touch protection

touchp2

SCR based test

Pull down to voltage 5 volts[edit | edit source]

Simple pull down

Resister Ladder[edit | edit source]

[4]

Basic Resistor Ladder

reversed

Ladder +12v input

Unchained Ladder with 12v

Unchained Ladder e12 + 12v

Complete[edit | edit source]

complete

Complete2

Complete 3

Complete 4

c5

c6

Stripboard[edit | edit source]

s1

s2

s3

S4

s5

s6 - flipped board

s7

s8

Negative voltage[edit | edit source]

[5]

FPGA[edit | edit source]

ICE40 UL1k

ICs[edit | edit source]

Z-80

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