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  1. Those look pretty nice. The LEDs control is only...

    Those look pretty nice. The LEDs control is only on/off, not PWM dimming.



    The datasheet says they can run on 5 volts, but not 12 volts. Should work fine if you use only 1 LED per pin, or...
  2. Those 74HC595's might have trouble driving enough...

    Those 74HC595's might have trouble driving enough current for LEDs when running from only 3.3 volts. It will probably work, but the LEDs might not be as bright as you want.

    I didn't see values...
  3. I'll take a quick look, if you post a schematic...

    I'll take a quick look, if you post a schematic as a PDF. (I don't use Eagle)



    No. Or at least not in any reasonable way.

    touchRead() reads the capacitive coupling (to GND) of whatever...
  4. I think any of these boards will be fast enough....

    I think any of these boards will be fast enough.

    Just to keep things in perspective, a 3 byte MIDI message transmitted by a serial port to that drum machine takes 0.96 ms. Human perception of...
  5. So many questions! You'll generally get better...

    So many questions! You'll generally get better answers if you describe more of what you're trying to accomplish.

    It sounds like you're trying to build a MIDI controller, perhaps with a huge...
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