How can I measure -15V using the ADC of an AVR microcontroller?
I would like to scale my signal so that -15V signal voltage equals 0V at the input to the ADC and 0V signal voltage equals 5V at the input to the ADC. Vref and Vcc are 5V.
I am using arduino pro mini (which contains Atmega328p AU ) along with cc2541(HM-10) to process and transfer data over BLE to smartphone. I...
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