N Cook wrote in message
...
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
http://home.graffiti.net/diverse:graffiti.net/



looks as though the problem is in the unseen amp, foot controller sends out
midi signal on all functions