Battery Dumper

A machine that, when activated, dumps its batteries and powers off.

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How useless can a machine get? It has a stand, a control circuit, an activation button, a relay, a motor, a battery compartment and absolutely zero use.


Short video showing it working. Press the button, it turns on, batteries fall out.

MPEG-4 Video - 4.26 MB - 08/06/2019 at 21:20


  • As seen on YouTube!

    SirDan08/07/2019 at 14:55 0 comments

    Uploaded the video to YouTube. Enjoy. 

  • Design Process

    SirDan08/06/2019 at 21:57 0 comments

    So, this is in the same vein as the Unpluginator. It's sole purpose is to remove it's own power source. Due to the time required to put the batteries in and sit upright, this needed a button to trigger it. I used a 555 timer (27p for 10, including 7-day delivery from China, insane) to create a latching circuit. This triggered a relay, which turned on the motor. It could have been more refined, but the only spec was for it to work. 

    The motor is unable to pull the latch open when already taut, so I leave some slack in the string. This gives the motor time to get some momentum, pulling the string tight with enough force to pull the latch open.

    Initially I tested it using an external power source, before attaching the circuitry to the device.

    I could design a circuit board for this, but the proof of concept is there and that was enough for now.

View all 2 project logs

  • 1
    Print Parts

    Print parts. Assemble. 

  • 2
    Connect Circuit

    I used a breadboard. Nice and simple, but a bit messy.

  • 3
    Insert Batteries

    Stick batteries in. Close battery cover. Press button. Done.

View all 3 instructions

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