Make a battery interrupt

John Schimmel, 03/16/2014

Overview & materials
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The battery interrupt is a component that sits between a battery operated device and a capability  switch, it allows a capability switch to control the ON & OFF of a battery device such as a toy or radio. The device "interrupts" the battery's flow of electricity using double sided copper clad which is typically used for electronic circuit boards.

The battery interrupt accepts the standard 1/8" (3.5mm) mono plug used with switches. Using a capability switch, a person might use their head to control a toy or their fingers or feet to activate a small fan.

Double sided copper clad is just like a sandwich, a piece of non conductive silicon wafer is sandwiched between two pieces of thin copper, the copper pieces are not touching. Electronic circuit board use this material to print double sided circuits.

To make the battery interrupt we will do the following:

  • Cut a small piece of copper clad or cooper sheeting
  • Solder one wire to each side of the copper.
  • Test inside battery device.
  • Solder an accessibility jack to the opposite end of the wires.
  • Insert inside battery device, test with switch.

Materials required

  • Copper - either copper sheet and thin cardboard OR double sided copper clad.
  • 1/8" (3.5mm) mono audio jack
  • Hook up wire (22 gauge)
  • Wire cutters/strippers
  • Soldering iron, solder and helping hands

Want to try this at home?  Purchase one of our component kits for $9.99