Oh, nothing fancy, just an analog square wave synthesizer...
(Builds 3 thru 5. Last of the unbranded stock. No Oskitone logo. PCBs have old tommy.sh domain.)
External controls: 13 keys, octave selector, volume knob + on/off switch
Internal controls: 13 trim potentiometers for tuning notes
Dimensions: 7.5"x 4" x 2"
IC Chips: LM555, CD4040, LM386
Interested in a custom design? I can make that happen. Let me know.
Also available as a DIY Kit!