Here is a marked-up schematic for the old auto-locator that was made for the MTR-12 back in the day.
I’m going to split this project into the following tasks:
- Power (yellow)
- Lamps (blue)
- Switches (green)
- Display (orange)
- Keypad (purple)
And then add the things that aren’t part of the original:
- Midi Functionality
- Control Software
I don’t plan on incorporating the variable speed control into my version of this, but one certainly could. I would simply add a digital potentiometer to the Arduino. I have no use for that functionality, as we are a mastering facility, and I can’t remember the last time someone asked me to change the playback speed of a tape machine.
So, here we go. First up will be the power section…