Multi-Mode Telemetry Beacon
Morse Code (CW)
Prototype breadboard of the CW/Hellscreiber transmitter
L to R: USB serial board, Arduino Stamp and SparkFun 434 MHz module

Schematic Diagram of the 434 MHz transmitter

Keyed CW output routine
Click HERE to download the full code for keyed CW

AM modulated CW output routine
Click HERE to download the full code for AM modulated CW
Flight-ready prototype using the Cypress PSoC CY8C29466 microcontroller
(can substitute the Arduino in it's place)