As a first dabble into amateur radio projects, I decided to build a Morse code practice oscillator. I searched around for a suitable schematic that my scrap-bin could supply all the parts for. In the end I settled on a simple 555 based circuit from the ARRL, found here. The circuit produces a square wave so isn’t the best sounding but is good enough for practising.
First I built the circuit onto a breadboard. Once everything was working nicely, I transferred it to strip-board for a more permanent solution. I then 3D printed a simple enclosure to keep everything together nicely. I added a 3.5mm mono jack to allow quick and easy connection of a Morse key.