Raspberry Pi Coin Dozer Won’t Make You Rich

Raspi in a coin dozer case

[SoggyBunz] lucked up and scored an Ultimate Raspberry Pi Bundle from Element 14. His idea was to use a Raspberry Pi to make a retro-mechanical arcade Coin Dozer game, and decided to build his first prototype inside a vacant Macintosh Plus shell.

The game is based on a Raspberry Pi running a small Python script. The Raspi operates a small servo that moves a piece of acrylic back and forth in a somewhat random fashion. The coins are inserted into slots cut into the Macintosh shell and eventually pile up. The moving acrylic lever pushes your winnings out of the machine and deposits them on whatever it’s sitting on, unlike this coin dispensing machine.

[SoggyBunz] concedes that the build is a bit rough and a servo is not the best choice of an actuator. But he aims to build a much improved version, and we can only hope he puts it on Hackaday.io and tips us in! Stick around after the break for a video of the Pi Dozer in action.




  1. Fabian says:

    just why would you use an raspberry pi?

    take a cheap gear motor and this works much better

  2. greenbacks says:

    Powering servo directly from a Pi?

  3. John U says:

    I can only assume if he didn’t have a Pi to hand he’d have resorted to Arduinos to do the job of a basic reciprocating mechanism.

    I’ve got a windscreen wiper motor here perfect for the job, I’ll post it to him for free if he promises to post the Pi kit to someone with a brain.

    Engineering student? We’re doomed.

  4. Mike Lu says:

    A simple gear motor would only make it move back and forth in a predictable manner. He’s trying to get a somewhat random movement. I should mention that it’s possible to get a pseudorandom movement using only mechanical parts, though that wouldn’t exactly be easy to build…

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