While batteries are cheap and readily obtainable today, sometimes it’s still fun to mess around with their less-common manifestations. Experimenting with a few configurations, Hackaday.io user ...

A lot of things tend to get stretched during the holiday season, like shopping budgets and waistbands and patience. This year, [Chris] is stretching the limits of both the mini breadboard and the ...

This joule thief led or high efficiency LED with 1.5 volt driver is a tried and tested circuit built around some discrete electronics components. A common 5 mm high-efficiency white LED (D1) is the ...

The project is known as the Joule Thief which is an open PCB torch that takes either an AA or AAA battery in the holder and lights a white LED by using whatever power is left in the battery. The ...

How to build a photovoltaic light system that operates at all times and is maintenance-free. The key role of the supercapacitor in this design. What is the "Joule Thief" circuit? Delivering ...

Gagyo Tech based in Los Angeles has created a new portable battery powered vehicle jump starter, called the KOMA, powerful enough to start any car or truck and apparently even small ships under 25 ...