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==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]
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