Arduino Lab

Microcontroller solutions and automated control systems for modern radio equipment.

Arduino UNO-nano DDS VFO

A Variable Frequency Oscillator (VFO) built with Arduino UNO and a DDS (Direct Digital Synthesis) module. Used for precise frequency generation in radio experiments and transceiver control.

Arduino nano Si5351 vfo

Band Decoder & Antenna Switcher

An automated band decoder that reads the current operating frequency and switches antennas accordingly. Eliminates manual antenna selection during band changes in contest operation.

Morse Code Keyer — nanoKeyer

An Arduino Nano-based electronic keyer with adjustable speed, memory, and sidetone. Compact enough to fit in a small enclosure for field use.

nanoKeyer 1 nanoKeyer 2 nanoKeyer 3 nanoKeyer 4 nanoKeyer 5 nanoKeyer 6
📄 nanoKeyer documentation (Word)