Good day! What can be added to the circuit so that the pulse duration can be adjusted? Thanks!If you want to make an independent drum system, it may have too much hardware that you can't do.
The first thing is that you must read some knowledge for the drum, and if you can study the arduino then you can complete your idea for the EE drum with the computer, even developing your own instrument sets using the instrument samples.
My LM324 op amp circuit.
op amp using LM324.
The video of Homemade Electronic Drum Kit : Coltronics Kit-e, 3D to show how the structures of the drum.
The pedal and foot switch.
piezo drum trigger -- images, schematic.
DIY Electric Acoustic Drum Triggers Tutorial for eDrums - The video.
The Drum Kit - Kit lets you turn your Arduino into a drum kit.
Piezo Drum Kit Quickstart Guide.
Mod: link to old Thread
https://forum.allaboutcircuits.com/threads/piezo-trigger-switch.98418/post-1267617