1) and
2) I went to a thrift shop, there I found diffrent plates and with my DaTuner App on the smartfone I was able to found out the exact tone of the plate in the chromatic scale. I tuned the plate with an angular grinder by reducing the diameter of the plate, this moves it to a higher tone (to a lower tone is not possible).
3) I did many tests for finding out the right solenoid, the distance to plate, the length of the solenoid impulse, etc..
4) I used a rubber pulse damper for fixing the plates. To reduce the swinging amplitude I put e small PVC tube arround the damper.
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Hi Fred
Sorry for beeing so late with my answers:
1) and
2) I went to a thrift shop, there I found diffrent plates and with my DaTuner App on the smartfone I was able to found out the exact tone of the plate in the chromatic scale. I tuned the plate with an angular grinder by reducing the diameter of the plate, this moves it to a higher tone (to a lower tone is not possible).
3) I did many tests for finding out the right solenoid, the distance to plate, the length of the solenoid impulse, etc..
4) I used a rubber pulse damper for fixing the plates. To reduce the swinging amplitude I put e small PVC tube arround the damper.
5) I used MIDI songs from the interner, e.g. from http://midimi.org/
6) At the moment I can select two channels from the MIDI File to play on the piattuino
7) Of course a e.g. two line character display would be more comfortable, but to keep it simple, I selected this display
Many Greetings
Heinz