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A device which includes a central processing unit (CPU), memory, and (generally) an assortment of I/O peripherals (UART, ADC, DAC, general-purpose I/O, I2C, etc.) in a tightly-coupled standalone package.
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Ground loop via pull-down resistor
I'm developing an STM32-based device, one of whose functions is to periodically monitor the main power 12V battery voltage.
I created a simple switching circuit with a voltage divider. I have added a …