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After a lot of testing I give you: the TeensyDrum! Here’s some bare boards.

Front: Front

Back: Back

Assembled: Assembled

With LCD, jacks and rotary encoders added: LCD

So what makes the TeensyDrum different? It has all the same features as the original microDRUM, but more! So let’s go through the list:

  • Serial(hardware) MIDI IN and MIDI OUT(with opto-isoplator)
  • USB MIDI (IN and OUT)
  • Up to 10 multiplexers can be attached, FOR A TOTAL OF 80 INPUTS!
  • Either powered externally OR through USB
  • LED to see the board is on
  • External D+ and D-
  • Can use a 16x2 LCD (standard or with 595) OR 20x4 LCD(with serial backpack)
  • LCD 2 button system OR rotary encoder with push button
  • Many, many extra digital pins for general use
  • WAV Trigger compatible
  • Overall cheaper ~$60-80 for all PCB components (not including jacks/other stuff)

More details to come!

This is the schematic: Schematic

Just imagine it’s a Teensy 3.2 instead of the Arduino. The clock speed is much higher than the Arduino, at 96MHz when overclocked. And here is the code: https://github.com/massimobernava/md-firmware/tree/teensy-firmware