Trinket m0 CW Beacon Case

thingiverse

This is an Arduino-based morse code (CW) beacon keyer that I put on an Adafruit Trinket m0. It uses: * SB4 snappable bread board https://amzn.to/2Y9EQSZ * Adafruit Trinket m0 * Red LED * 2N3904 NPN transistor * 220 ohm resistor * TRS 3.5mm stereo cable * This Arduino code: https://github.com/denmojo/morse-table This case is sized to a 1/4 piece of the snappable bread board (portion without green labeling), and accommodates larger microUSB connectors. The hole up top is for the LED, and the hole on the other side is for the CW cable. Red and black wiring solder to tip and ground of 3.5mm TRS cable to key a radio (radio set in straight key mode). Plug in USB power (5v) and connect to a ham radio keyer port, and you have yourself a foxhunt beacon, or dedicated CW beacon.