Simplest ultrasonic ANTISPY voice recording jammer based on ATTINY13 / ATTINY85/45/25 / ARDUINO with PAM8403 / TPA3116D2 module driving piezo ultrasonic transducers (and optionally AD8933 signal generator)

Patches to enable 15KHz video output

Arduino-Based Pump and Fan Controller (OOP, 25 kHz PWM, Separate Hysteresis & Curves for Normal/Benchmark Mode)

Arduino project controlling a PWM PC fan with a rotary encoder, monitored on a small graphics LCD.