qs's Profile

Reverse Joule Thief Light PUBLIC

A novel circuit to charge a Li-ion battery from a 2v Solar cell

by qs | updated July 14, 2013

joule-thief   led   lighting  

Dimmable Joule Thief Buck circuit with MOSFet PUBLIC

A quick and easy circuit to control a 10v 200mA LED array using a 2N7000 MOSFET. Dimming is done through R2.

by qs | updated May 09, 2013

2n7000   buck   joule-thief   mosfet  

Dimmable Current-controlled LED driver PUBLIC

A simple dimmable driver for a 10v-200mA LED array. Part is DX SKU: 195326 ($2.60)

by qs | updated April 29, 2013

current-controlled   dimmable   driver   joule-thief   led-array  

JT Dimming Driver Circuit PUBLIC

A "true" Joule-thief circuit to drive a 3S2P LED array from DX (SKU 195326). Features a dimmable output.

by qs | updated April 29, 2013

12v-driver   joule-thief   led-array  

ULV 2-stage JT PUBLIC

by qs | updated March 20, 2013

Mg-Cu cell Flasher PUBLIC

A purpose design to utilize output from a Mg-Cu (salt-water activated) battery to power a hi-power LED as a flasher. R1 is the simulated internal resistance of the cell.

by qs | updated March 20, 2013

flasher   joule-thief   magnesium-cell  

Joule Thief Timer PUBLIC

A simple single coil Joule Thief with a timer function.

by qs | updated September 04, 2012

joule-thief   timed-light   timer  

Dual 2222 Joule Thief PUBLIC

A simple single coil Joule Thief using two 2N2222 transistor to convert 1.2-volt to light a white LED.

by qs | updated September 04, 2012

dual-npn   joule-thief   simple-2n2222  

JT Buzzer PUBLIC

A simple alarm which operates on 1.5-volt by using the coil of a speaker to act as an inductor for a Joule Thief circuit.

by qs | updated September 04, 2012

JT Flashlight Conversion PUBLIC

by qs | updated April 02, 2012

flashlight   joule   joule-thief   led   light   thief  

Simple JT Flasher with Daylight sensing PUBLIC

An attention grabbing Joule-Thief blinker using a single transistor and shuts off during daylight.

by qs | updated March 13, 2012

blinking   flasher   joule   joule-thief   led   thief  

1-watt Joule Thief PUBLIC

A high-power Joule Thief type circuit to drive a 1watt LED from a 1.5 volt source. A suitable driver transistor, like the 2SD965, 2SC2500, 2SC2655 MUST be used! The second winding has been replaced by...

by qs | updated March 10, 2012

joule   joule-thief   led   power   thief  

Simple JT Flasher PUBLIC

A simple, 1-volt LED flasher using a single transistor.

by qs | updated March 10, 2012

blinker   flasher   flashing   joule   joule-thief   thief