Hello all! I’ve since prototyped a new circuit with 12v keying and minus the shift registers, in SimulIDE. Posting it here for anyone who may find it useful, I believe the 300ohm voltage drop resistors are the wrong value though based on advice from OrganForum. It was suggested I substitute these for 2.4/2.7Ohm resistors to bring the 12v safely down to approx 5v (post here), would anybody here agree with this? I know I should probably use a voltage regulator for electrical robustness, but I just wanna get a noise out of this thing. I’ll come back later and make it all safe, haha
Are there any special considerations I should take with regards to the transistors, too? I’d planned to use 2N2222s, do tell me if these are unsuitable. The Yamaha keyboards already had diodes soldered to the boards, so the 1N4148’s I bought as per Bob @ Hauptwerk Hardware’s advice (A really fantastic tutorial series with lots of information on how to perform the wiring of these conversions, as well as an excellent MIDI encoder to buy if you aren’t willing to try and make one yourself) I’ll keep for wiring up levers, switches, buttons etc. They’ll be useful for something!
Thank you once again for all of the help so far, It’s coming together! If I manage to make it work, I’ll share everything I’ve managed in a new thread for anyone who comes after me
