$20 Synth

 

Here's all the articles relating to the $20 DIY Arduino Synth:

Complete Build Guide:

Full build instructions (suitable for beginners) can be found here

How it was made;

Part 1 - MIDI and Wav select switch

Part 2 - Envelope Attack & Release

Part 3 - Add a Low Pass Filter

Part 3.1 - Minor Updates

Part 4 - Final Part - Add the LFO

Some videos;