This Joule Thief PCB is a compact implementation of the classic ultra-low-voltage boost converter which allows you to extract useful energy from nearly depleted batteries and boost it high enough to power LEDs and low-power electronics.

Designed for learning, experimentation, and demonstrations, this PCB removes the guesswork of breadboarding and gives you a reliable, repeatable circuit you can build in minutes. It is ideal for hobbyists, students, educators, and engineers who want to understand boost conversion, inductors, and transistor behaviour at a practical level.

If you want a simple, proven Joule Thief circuit that actually works, and a great hands-on way to explore power electronics, this board is for you.

No components are included, you will need to source your own and will need the following parts

1x 1k Resistor

2x Terminals

1x NPN transistor 2N2222

1x White LED

1x Ferrite core

2x length of enamelled copper wire

Alternatively you can purchase the kit with all components and instructions using this link