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https://www.analog-monster.de/un_kbd_en.html
https://www.analog-monster.de/mmt950_en.html
If you insist on resistor chaines: The circuit is part of the service manual. There are other circuit examples as well, like the Formant 1 Keyboard and others.
I agree that an exact clone of the Prodigy is a nice project, but to clone the keyboard exactly by using a resistor chain does not make sense. It is just control logic and does not affect the real cool sound of the Prodigy in any way. Just take a small fatar matrix keyboard and create a microcontroller based scanner to create CVs like the original, additional MIDI OUT if you like and so on. I did that with my own keyboard projects, and it works nice:Designing the housing, board and switches is the easiest for me because I have access to the tools and skills. However, I would like to make the keyboard exactly like the original without any MIDI digital processing, I know that there are 31 pieces of 100 Ohm 1% resistors, but I don't know what the circuit looks like because it is not in the diagram, there are only 5 wires connected to the keyboard, Does anyone have an electrical diagram of this keyboard circuit?
https://www.analog-monster.de/un_kbd_en.html
https://www.analog-monster.de/mmt950_en.html
If you insist on resistor chaines: The circuit is part of the service manual. There are other circuit examples as well, like the Formant 1 Keyboard and others.
Statistics: Posted by analogmonster — Sat Feb 01, 2025 12:13 am