Joule thief cfl driver

The approach below is popularly known as jeannas light heres jeannas youtube channel. A highpower joule thief type circuit to drive a 1watt led from a 1. A common 5 mm highefficiency white led d1 is the key component in this design. Joule thief circuit powering a compact fluorescent lightbulb. The present article discusses 3 such circuits, however here we replace. The second winding has been replaced by a pnp 2n3906 and c1. Nov 19, 2011 could be my circuit, but with the battery voltage at 0. Fuji circuit joule thief cfl light video dailymotion.

The transistor does affect how low the circuit runs to. While the simple joule thief is easier to make, one can make the joule thief more efficient use less current, by removing some windings from the inductor that goes to the base of the transistor. In this video i have shown how to make joule thief from cfl simple step by step it can power leds from low voltage source example aa battery. 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. Just take the core from the pcb of a discarded cfl and wind 10 turns of. Jan 23, 2020 how to use an fuji circuit cfl breakover voltage to create a reservoir of higher voltage for charging batteries. Diy joule thief from broken cfl recycling eslams lab. Heres what it looks like if you dont know how to read a. Mar 21, 2015 this joule thief led or high efficiency led with 1.

The npn transistor is a generic surface mount transistor i chose based on its price and similarity to the 2n2222. Charge circuit for 2500mah batteries takes 14hrs using lower current. Pdf joulethief circuit performance for electricity energy. I keep that battery around to find the shutdown voltage of the various joule thieves that i made. How to make joule thief from cfl simple step by step youtube. Instead of using one led i have added 19 for increased brightness. Using the findings from my previous post joule thief measurements. Jan 17, 2016 the circuit is the basic joule thief found easily on the internet with one small change. October 10, 2007 bird603568 sent in this sweet little led hack thatll drive a white led from just 1. The joule thief gets the last few % of the available power out of a almost dead battery. This circuit is also known by other names such as blocking oscillator, joule ringer, vampire torch.

Base resistor i changed the base resistor value from 1k to 6. In the photos below you can see ive put it in a soda can and im using it to read by. This circuit boosts the peltzier output up to 14 volts by. How to make a joule thief circuit that powers a compact fluorescent lightbulb cfl using batteries, in this case the jeannas light approach.

Fuji circuit joule thief led light 2 alternate energy. It was a very small implementation of a typical transformer feedback single transistor invertor. Nov 25, 2016 here a simple 1 watt led driver circuit based on a modified joule thief design, runs on a 1. The extreme joule thief kit utilize a dedicated onboard 1w led driver which can operate from voltages as low as 0. Jul 15, 20 the circuit for rimstars battery powered cfl bulb is a joule thief. Pdf joulethief circuit performance for electricity. Jun 5, 2015 while trying to wind a small toroid transformer to make a joule thief and them a cfl driver, i found my self wit the problem that it is very very hard. A switchmode powersupply boost dctodc converter the proper name for a joule thief is beneficial if it is configured to drive a led in constantcurrent mode while the input voltage can vary over a wide range.

You most commonly see this kind of circuit used to power leds with a dead battery, but there are many more potential applications for a. Mar 10, 2012 a highpower joule thief type circuit to drive a 1watt led from a 1. Also, the electronics has to be removed from the cfl so that the joule thief circuit is powering the fluorescent tubes directly. To make a joule thief battery charger is a quick and easy project. The basic requirement is any npn transistor, a laser diode, a ferrite ring,a. A joule thief is a play on words because it allows you to steal watts from dead or inefficient batteries for many, many seconds, if not weeks. See more ideas about joule thief, joules and motor generator. I am trying to compare using the 2 aaa batteries at about 2. Diy joule thief from broken cfl recycling parts list. Bug zapper circuit mod fuji circuit, joule thief circuit duration. Joule thief eight layer coil lighting cfl off aa battery. A disposable camera flash circuit that i modified to drive a compact w fluorescent bulbnot at full brightness for 56 hours on 2 aa. Dec 25, 2017 i stuck with the bc81725tp npn transistor used in the original multiled joule thief and the joule thief candle since it works and i purchased enough of the them to make hundreds of units. Joule thief circuit performance for electricity energy saving of emergency lamps view the table of contents for this issue, or go to the journal homepage for more 2017 iop conf.

I am in the process of building a battery charger this week and will put data about this project as i charge batteries. Here a simple 1 watt led driver circuit based on a modified joule thief design, runs on a 1. I have run the circuit with different transistors and capacitor values but the results are the same, if i use the 68 pf capacitor and adjust the 10 k pot for a minimum cfl brightness then the battery power consumption. This little joulethief dc upconverter circuit can work from extremely low input voltages and produce a usable electrical potential of 2 to 5 volt output. This joule thief led or high efficiency led with 1. Experiment with joule thief circuit do it easy with. Following the tips outlined below, you can use the joule thief circuit to power a compact fluorescent lightbulb cfl using just some aa batteries.

The most basic schematic for a joule thief circuit this and the next pic are from how to get what you want. There is an onboard potentiometer which can vary the output current of the driver from 0ma to 350ma. I got the concept of this circuit few years back from a led torch, which was powered by a single aa battery. This is a modified version of jeannas joule thief fl driver circuit using a big 314 toroid coil.

That switches the collector circuit repelling the magnet from the coil. The circuit shown in this video is a modified version of lidmotor and jeannacavs which were uploaded on their youtube channels. The joule thief circuit is not very efficient, although it probably will allow you to run longer, because the batteries will still provide enough power for it, even after they fall below 1 vcell. While these circuits are usually used as a demonstration to get every last bit of energy out of a battery with a led. The joule thief kit can also run customer supplied leds with vfwd voltages up to 4. Jan 20, 2020 resistor, cap and bulb size seem to play a big part in the circuit along with tuning for maximum cfl brightness and input power. Very time consuming and i ask my self it have to be a better way to make this.

Patent 3783550 novelty electric motor by roger wayne andrews, jan 8, 1974 includes what amounts to the joule thief circuit, but instead of using a battery it gets the transistor base drive from a magnet moving past a coil. Easy joule thief soldering kit from makersbox on tindie. The best in this case turned out to be 8 loops by 20 loops, with the eight loop end going to the base of the transistor. How to build a joule thief step by step the simplest switching power supply inverter duration. One example you can reference is a video on you tube called jeannes light, or this other one by lasersaber called joule ringer and joule ringer 2. In the big joule theif thread of the energetic forum some wizards are producing light from cfls using only 1. A joule thief is a minimalist selfoscillating voltage booster that is small, lowcost, and easy to build, typically used for driving small loads. In the comments one of my fanstestas 3339 want to build the great joule thief circuit so i made it. How to build a flashlight that runs on dead batteries. This circuit is pretty efficient and it can power a 1 watt white led quite brightly. But sadly i found very soon that most companies charge tens of thousands of dollars for the simplest of the machines. The joule thief fuji circuit cfl remains one of the favorite topics on electronic forums all over the internet. An analysis of a joule thief circuit embedders life.