Motor Party!

it is like -19213 degrees outside, so i spent the day workin’ on my motor shield design and then had a MOTOR PARTY!

Here is a preview of the motor shield for Arduino that I’m workin’ on…it can drive 2 hobby servos as well as up to 2 steppers or 4 bidirectional DC motors.


  while(1) {
    servo_setpos(1, -2000);
    servo_setpos(2, -2000);
    motor(4, FORWARD);
    for (i=0; i< 250; i++) {
      stepper(1, FORWARD, SINGLE);
    motor(4, BACKWARD);
    servo_setpos(1, 2000);
    servo_setpos(2, 2000);
    for (i=0; i< 250; i++) {
      stepper(1, BACKWARD, SINGLE);

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  1. Will this be ready as a kit or schematic? It so when!!

  2. Excellent!

  3. 🙂 You can call these guys the ‘Gotham City Rollers”.

  4. >drives 2 steppers
    unipolar or bipolar

  5. these steppers that i had in my STUFFBOX are unipolar, but from what i understand, the hardware for bipolar is the same so if i could get my hands on a bipolar stepper it would be straightforward to add code support

  6. me likey! i’d buy that for a dollar … or however many it costs 😀

  7. I was listening to ‘Pilgrims of the Mind – Something’s Pulling me Under’ on SomaFM’s groovesalad while watching this video. The flappy, buzzy motor sounds were in perfect time with the music. Happy++

  8. ladyada — disassemble an old floppy drive. It will likely have bipolar. Or, if you can get your hands on a six-wire stepper, you can connect it up as either unipolar or bipolar. Great to see software for this otherwise orphaned shield board. Now … does it work with the boarduino (obviously not, but I thought I’d just ask that question. Maybe with the addition of a set of holes off to one side into which you could solder a boarduino? Or for that matter, just put the Atmel on the motor control board, with the six-pin angle connector and be done with it.)

  9. ladyada – Are schematic and pcb available? It’ll be great for my project and I’ll buy the pcb if available.Cool video.

  10. I’ve been working on my own motor control interface for the Arduino, but it sucks so far because I’m not really a very good electrician at all, at all. Can’t wait to see what you came up with!

  11. these are in the shop now…

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