the concept is to control acoustic drum…or anything else
I see some people asking on uCApps forum to drive solenoid from a core module.
the problem is solenoid need a fixed timing to have the proper action!
whith MBseq or a software you could control the lenght (decay) but you’ve got to redefine at each note the good value and if you change BPM the parameter change (stretching).
to have the desired fixed timing two solution:
-edit the log (too hard for me)
-fixed circuit:
at the output pins of a DOUT 74hc595 you plug this circuit:
Thanks for the answer! I did use a transistor switch circuit for adding LED’s to my gate outputs so I’ll manage that. On the highly liquid forum I found something with an ULN2803A transistor array. I just ordered some solenoids inChina, so now waiting for them to arrive.
Yes if you want to drive lot of gate, an array is good idea to gain space/layout, still be careful with current requirement depending of your solenoid/relay need, also flyback diode in your case (inductive load)
I was thinking of building a drummachine something likethis And as an extra I would like to add piezo contact mics, to amplify the sound. I want to make some sort of toolbox, with clamps and stuff, so you can turn anything into a percussion instrument…might be super
But as I suspected, the video you link use TO220 package for “power drive” can’t say the transistor ref used here but certainly more than 1A capabilities.
Check your solenoid datasheet, there is chance ULN2803 can’t drive them safely.
The solenoids I ordered use only 120mA and the ULN2803 could drive upto 500mA each output, so that won’t be a problem. I don’t know if the solenoids will be powerfull enough, but when I’ll check bigger ones, I’ll look into the current thingie. Thanx for your input