https://github.com/atoomnetmarc/joule-thief

A joule thief is a circuit able to use the very last electron from a 1.5V battery.
https://github.com/atoomnetmarc/joule-thief

aa battery led

Last synced: 3 months ago
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A joule thief is a circuit able to use the very last electron from a 1.5V battery.

• Host: GitHub
• URL: https://github.com/atoomnetmarc/joule-thief
• Owner: atoomnetmarc
• License: apache-2.0
• Created: 2021-04-10T16:28:22.000Z (about 4 years ago)
• Default Branch: main
• Last Pushed: 2021-04-10T16:28:49.000Z (about 4 years ago)
• Last Synced: 2025-02-03T20:49:58.964Z (5 months ago)
• Topics: aa, battery, led
• Language: AGS Script
• Homepage:
• Size: 225 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
In januari 2013 I designed my own version of the joule thief. What is special is the use of a standard inductor instead of one with 3 connections that you need to wind yourself.

A joule thief is a circuit able to use the very last electron from a 1.5V battery. 'empty' AA cells contain enough energie to light a white LED for over a week.

The schematic made in LTSpice.

![](white%20led%20circuit%20joule%20thief%20schematic.png)

High enough voltage to light a white LED.

![](white%20led%20circuit%20joule%20thief%20waveform.png)

The pcb that is still in use in 2021.

![](white-led-circuit-joule-thief-pcb.jpg)

![](white-led-circuit-joule-thief-detail.jpg)

[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)