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 […]
![completed morse practice oscillator](https://g5jda.uk/wp-content/uploads/2020/05/2020-04-01-16.23.33-scaled-e1588416411362-1200x916.jpg)