/diy/ - Do It Yourself

just made a synth from scratch.
With a simple attack decay vca, two xr-2206 osc, hardsync ad 333 + schmitt inverter 40106 and a osc mixer.
the arduino controls digital pots for all notes changes and all other functions using a mcp23017 expander.
midi compatible on a mega board with, on the computer : midi hairless bridge (serial to midi router) and loopmidi as the internal midi router.
Worked well for 2 weeks until I implemented in a hurry a jfet for pitch mod.
I placed it in // with the timing resistors r1 / r2 and shunt the xr-2206 pins to ground... damned. the original plan was to put it in series with the timing digital pots...
That is the result when you hurry with electronics.
Made a thread on electro-music.com developpers corner for anyone interested with the blueprints.