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2 layers186.1 × 18.6 mmFlex Battery Interrupter 200, the printed circuit board in 3D

Open-source battery interrupter based on a flexible PCB and a 3.5 mm switch jack for switch adapting simple battery-powered toys or electronic devices.

Size
186.1 × 18.6 mm
Copper layers
2
Thickness
1.6 mm
Parts
5
Nets
2
Pads
5
Tracks, vias
3, 0
Routed
Yes
KiCad
KiCad 5 (file 20171130)
Created
25 Dec 2020
Updated
28 Aug 2026

Overview

Flex Battery Interrupter 200 is an open-source printed circuit board by makersmakingchange, from the makersmakingchange/Flex-Battery-Interrupter repository on GitHub. It is a 2-layer board of 186.1 × 18.6 mm with 5 parts on 2 nets, routed with 3 tracks and 0 vias.

It belongs with the power boards of this library.

README

README.md

Flex Battery Interrupter

A battery interrupter is a simple, affordable device that enables you to switch adapt many battery powered electronics devices and toys. The battery interrupt is slipped in between the batteries or battery and battery terminal, breaking the circuit until a switch is attached and closed.

This device is a battery interrupter based on a flexible PCB with a mono/stereo 3.5 mm audio jack.

The original design was created by Dale Grover which is called Flex_Battery_Interrupter_200.

The shorter model was created to offer an even more affordable option which is called Flex_Battery_Interrupter_100.

The difference between the two models is simply the length of the battery interrupter.

Makers Making Change Assistive Device Library

Flex PCB Models

The design files for the two models are available and can be found using following links:

  1. Flex_Battery_Interrupter_100 (100 mm x 34 mm)
  2. Flex_Battery_Interrupter_200 (203.3 mm x 34.3 mm)

3D Printed case

Flex_Battery_Interrupter_Jack_Case provides additional support for both Flex PCB and the 3.5mm jack.

Build

The following documents will guide you through the build process:

  1. Flex_Battery_Interrupter_Maker_Checklist
  2. Flex_Battery_Interrupter_Tools_List
  3. Flex_Battery_Interrupter_PCB_Fabrication_Guide
  4. Flex_Battery_Interrupter_Assembly_Guide

Gerber Files

The gerber files are available to be sent out to your favorite PCB fabrication company. You can use the following settings when you order your Flex PCBs:

text
Layers: 2 Layers 	
Thickness: 0.2 mm
Min Track/Spacing: 2/2mil
Min Hole Size: 0.15 mm
Finished Copper:1 oz
Stiffener: Without 
3M Tape: without 	
EMI shielding film: without
Board type: Single piece 
  1. Flex_Battery_Interrupter_100 (100 mm x 34 mm)
  2. Flex_Battery_Interrupter_200 (203.3 mm x 34.3 mm)

Components

The main component of Flex Battery Interrupter is a 3.5mm Stereo Jack which is listed in Flex_Battery_Interrupter_BOM.

Attribution

Contributors

Dale Grover contributed to the inital idea and design of the battery interrupter using a flexible PCB.

The PCB, 3D printable jack enclosure, and all documentation was completed by Makers Making Change.

License

Copyright (c) 2022 Neil Squire / Makers Making Change.

This repository describes Open Hardware:

You may redistribute and modify this documentation and make products using it under the terms of the CERN-OHL-W v2 (https:/cern.ch/cern-ohl). This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN-OHL-W v2 for applicable conditions.

Source Location: https://github.com/makersmakingchange/Flex-Battery-Interrupter


About Makers Making Change

Makers Making Change Logo

Makers Making Change is a program of Neil Squire, a Canadian non-profit that uses technology, knowledge, and passion to empower people with disabilities.

Makers Making Change leverages the capacity of community based Makers, Disability Professionals and Volunteers to develop and deliver affordable Open Source Assistive Technologies.

Contact Us

For technical questions, to get involved, or to share your experience we encourage you to visit our website or contact us.

Parts

5
QtyValueFootprintReferences
2LOGOflexarupter_1.01:MMC_Logo_Smaller_KiCadG***, G***
1JACK_STEREOMW_conn:SJ1-3513_3_5mm_stereo_jackJ1
1LOGOflexarupter_1.01:MMC_Logo_KiCadG***
1batteryInterrupterMW_conn:BatteryInterrupterJ2

Questions

How big is the Flex Battery Interrupter 200 PCB?

It measures 186.1 × 18.6 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Flex Battery Interrupter 200 use?

5 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Flex Battery Interrupter 200 KiCad files?

From the makersmakingchange/Flex-Battery-Interrupter repository on GitHub, at the commit this page was made from: the board is Design_Files/PCB_Files/Flex_Battery_Interrupter_200/Flex_Battery_Interrupter_200.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Flex Battery Interrupter 200 design in my own project?

Its repository states no licence, so its author keeps all rights: ask makersmakingchange before reusing the design.

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