technology workshop craft home food play outside costumes 1,5V to LED Voltage Converter a.k.a. Joule Thief by MartinL10 on September 24, 2015 Table of Contents 1,5V to LED Voltage Converter a.k.a. Joule Thief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Intro: 1,5V to LED Voltage Converter a.k.a. Joule Thief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Related Instructables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 http://www.instructables.com/id/15V-to-LED-Voltage-Converter-aka-Joule-Thief/ Intro: 1,5V to LED Voltage Converter a.k.a. Joule Thief This is a schematic I accidentally got working. I was experimenting an idea to get a LED PWM on a 1,5V using a astable multivibrator to drive inductor and use its magnetic field collapse to light up an LED in rapid short pulses but I got more than I bargain for and the LED lit up with high frequency in 10s of kHz range - pretty much like a Joule Thief circuit. You can get parts from old CFL to build this, the capacitor capacitance is not critical, although you can find 22nF (223) and 47nF (473) capacitors in any CFL electronic ballast, I even tried two 1,2nF high voltage capacitors used to turn on the tube between two filaments that worked well on this circuit but the LED was little bit dimmer, the inductor is 1,3 to 3 mH range, few turns on a toroid doesn't work on this, but the ballast and some bobbin type filter inductor from CFL does well, but test the pinout and condition of the transistors before reusing these, as sometimes the pinout on these (13001, 13002, 13003, 6823D) is base-collectoremitter instead of emitter-collector-base and sometimes the transistors die during bulb EOL. So this is a share of the result, you can use this schematic to build your own version. CC-BY 4.0 - Attribution (use permitted). The transistors on the schematic is 13003's, but any NPN should work. You can use PNP transistors also, but you need to reverse the power supply and the LED. Related Instructables Sequencial ritmico com Joule Thief (video) by antonlgm Joule Thief LED Night Light by ledartist 3W LED Strobe Joule Thief 2 AA Batteries and Joule Thief 10x10 LED Lamp by bneo99 by hanlin_y DIY How To Make Joule Thief With ( Diagram And Full Detail ) by zhyar4kurd Stealing a joule thief from a cheap solar garden light by masynmachien Advertisements Comments 2 comments Add Comment DIY Hacks and How Tos says: Sep 24, 2015. 5:38 AM REPLY Nice joule thief MartinL10 says: Thanks. http://www.instructables.com/id/15V-to-LED-Voltage-Converter-aka-Joule-Thief/ Oct 1, 2015. 3:00 AM REPLY
