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  1. Hi there, I own one of these: http://www.hammondclub.nl/db/upload/cache/image_resized/539x422/J_412_1972_OK.jpg. I bought it for $40 years ago and it's not valuable by any means. I use it right now as a conversation piece/bookshelf. However, I would really like to make it a useable instrument for my band (I play multiple keyboards). I am familiar with MIDI but no matter how much research I do, I still wind up getting confused about "DIY"ing. I want to convert this to a MIDI controller (I don't care about the organ stops, just the on/off/volume knob) and be able to use it with Logic as a basic starter module. I already have my three keyboards; I'd like this one as simply a way to add more texture/layers and the foot pedals. Would someone kindly be able to provide me with a tutorial that is user friendly to a MIDI rookie and let me know exactly what parts/board, etc. I would need for this project. I'd really appreciate it so much!! Thanks
  2. DIY Hammond Clone

    Hello everyone, I am a physics student who plays the Hammond. Finally I graduated and I am moving away from my family, but that means I will not have an Hammond to play anymore. Given the very high prices for clones, I would like to build a MIDI clone.   I was thinking about a configuration using 2 Fatar waterfall keybeds, a B3 drawbar assembly, and some random knobs and switches. I was also thinking about using MIDIbox for the processing.    I have a spare STM32F4 Discovery board lying around, and a spare B3 drawbar assembly.   The configuration would be: - 2X 5 octave keyboards (130 switches.) optionally i would like velocity (260 switches) - 38 drawbars (potentiometers) - approx. 20 switches - approx 6 potentiometers.   What configuration would you suggest to use with Midibox? NG? KB? Is this doable with midi box? What is STM32F4 support state?   Thanks for your time, Philip
  3. I've been unsuccessfully trying to get hold of a Native Instruments B4D drawbar MIDI controller. So I decided to build my own.   I had a Raspberry Pi lying around, and hadn't come across this site back then, so I decided to use the Pi to control it all. I've tried out IO piggy back boards and ADC piggy back boards. The Raspberry Pi experiments were successful. I have a Java program reading the IO ports and the ADC channels, and sending MIDI events over the Pi's USB to a USB-MIDI adapter and a synth.   Then I obtained some Hammond drawbars. They aren't B3/C3. They are from an H100, allegedly.   I've read the posts here, about the original wiring of the drawbars, but I'm still confused. I understand that they are giant switch buses and not potentiometers. But all the buses are connected to each other by a little circuit board at one end. I wondered if there were some differences in resistance between the ciruit board connections, but it doesn't seem so.   It's not a show stopper as I can unsolder the circuit board and add some resistors as mentioned elsewhere on the forum, but I'd love to understand what I'm disconnecting.   Can anyone kindly explain how everything isn't actually connected to everything, please??