An Arduino Uno based Smart Battery Monitor & Cooling Controller for a 12 V sealed lead-acid (SLA) battery. It measures battery voltage and temperature, estimates state of charge (SoC), drives a ...

A bare-metal ultrasonic radar for the Elegoo UNO R3 (ATmega328P), with a sweep-line GUI on the computer. Everything on the microcontroller is written in plain C against the AVR registers — no Arduino ...