RSS
"In the November 1999 issue of EPE (Everyday Practical Electronics), a small and intriguing circuit was published in the Ingenuity Unlimited section by Z. Kaparnik. It was a very small implementation of a typical transformer feedback single transistor invertor. The transformer was a standard ferrite bead with two windings wound on it and the circuit was using the high voltage pulse generated when the transistor turns off to light an LED from a single 1.5V battery. This page has two variations on the original design to use the simple circuit in a useful manner." Link.
HOW TO - Make a Joule thief
"In the November 1999 issue of EPE (Everyday Practical Electronics), a small and intriguing circuit was published in the Ingenuity Unlimited section by Z. Kaparnik. It was a very small implementation of a typical transformer feedback single transistor invertor. The transformer was a standard ferrite bead with two windings wound on it and the circuit was using the high voltage pulse generated when the transistor turns off to light an LED from a single 1.5V battery. This page has two variations on the original design to use the simple circuit in a useful manner." Link.
Posted by Phillip Torrone |
Nov 23, 2005 06:24 AM
Electronics |
Permalink
| Comments (2)
| Email This |
| Digg this!
Recent Entries
- BlueSMiRF found in credit card sniffer
- Mystery iPhone musical instrument
- Stained glass d20s
- CRAFT Thanksgiving roundup
- 3D renderings of the Mandelbrot set
- New in the Maker Shed: Microbe Motel kit
- Science through graphic novels
- Tiny solar-powered brass engine in a wineglass
- Maker Shed kiosks at Fry's
- New hackerspace in Chicagoland: Workshop 88
Comments
Oldest comments listed first.
Leave a comment
Subscribe to MAKE Magazine!
Subscribe today, save 42% and get web access to MAKE free. MAKE Digital Edition is available only to subscribers.
$34.95 / 1 year
(4 Quarterly Issues)
This is a great project. Wanting to get the most out of batteries is something that just about anyone can sink their teeth into. And the replacement bulb idea is 'brilliant' (no pun intended... I think)
Reply to this comment
It is a superb piece of work by a very patient and precise person. Well done, Keep up
Reply to this comment