10/23/2025
DIY Servo-Tuned AM/FM Spirit Box (Arduino Nano + SG90) Build a mechanical spirit box that sweeps an analog radio using an SG90 micro-servo and an Arduino Nano. Adjustable C-bracket, field-tough, and tunable via a front-panel k**b. Finished build — windowed lid, power/mode switch, sweep-speed k**b. Parts Arduino Nano V3.0 (ATmega328P, 5V/16MHz) + WYPH Nano I/O Expansion Shield SG90 micro-servo (180°, non-continuous) + cross horn…...
DIY Servo-Tuned AM/FM Spirit Box (Arduino Nano + SG90) Build a mechanical spirit box that sweeps an analog radio using an SG90 micro-servo and an Arduino Nano. Adjustable C-bracket, field-tough, and tunable via a front-panel k**b. Finished build — windowed lid, power/mode switch, sweep-speed k**b....