2019-12-11 (W) MIDIGlocken

Drawing the keyboard levers up required ferrous material hanging off the back end. Ideally, I would have put the electromagnets right above a steel screw in each key, but there was not enough space. My attempt at this proved the concept would work with screws. Instead, I purchased picture hanging hardware since those were strips of steel with a brass coating.
Example and placement of picture hanging hardware

I straightened plain picture hangers and used hot glue to stick them to the back of each key. They were light enough that they did not interfere with the operation or make them too heavy for the solenoids to pick up.
Picture hangers glued to keys

I wanted to test a couple of solenoids with switches. This situation comes up often enough that I built a test rig with five switches and screw terminals. For the sixth terminal, I added a common wire.

There was no trouble playing five keys from the switches. Clattering sound from the toy levers was distracting and, some of that might be absorbed with more foam.
(0:21) Five playable notes

The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6

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