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Hi there,  I'm looking for a row of solenoids or electromagnets to
use as an "Aufsetzer" (to put onto the keyboard, not to install into
the piano) which can be controlled by my simple Midi-Out hardware
(5-24 volts, maximum 500 mA per single output).  The hardware doesn't
support different velocity, so a cheap simple "on/off" solenoid or
electromagnet would do the job.

Does anyone know a source for such parts (European company preferred)
or has anyone built such an "Aufsetzer"?

Regards,

Michael Herklotz, Germany