14 switch and 2 pedal, midi output guitar pedal. One pedal not working - hope its not the pic chip. At the moment exploring the horrendous squeel from the pedals. Seems that for neutral hold, ie stays where the foot angle was last , relies on a steel sleeve inside then the moving and mount-steel plates, either side, and a through-bolt with nylock nut supplying enough pressure to make resistance to movement, as axle. But it is steel plate turning against steel plate on either side of the pivot - urgh ! How to deal with the squeel, oil would loose the neutral or dead action ?
As an aside Anyone know of a simple circuit for exercising/testing midi, both in and out, without tying up a scope or a pc, ie just to check that there is a functional change in the signal.
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
formatting link