This is the second post about powering an arduino from a capacitor. The basic setup is described in the introduction. It’s an ATmega328P in a standalone setup with use of the internal clock source. The power comes from the two capacitors on the picture. The microcontroller measures it’s own supply voltage repeatedly in intervals and writes data to the onboard EEPROM. After starting the measurement the power supply is plugged out and the ATmega runs off of the capacitors until the voltage is too low.
In this post I will describe how long the setup can run with different power-reducing techniques. Continue reading