5252f chip how to#
5252f chip pdf#

In the symbol, the part with the arrow is the вЂњemitterвЂќ, the вЂњcollectorвЂќ is the end above it, that also connects to the LED, and the вЂњbaseвЂќ is the wire leading off to the left, between the collector and emitter. One other detail that you may need to know is the symbol and pinout of the 2N3904 transistor. The other two wires from the toroid go to the resistor and to the intersection of the transistor with the LED. This goes to the positive end of the battery. In the circuit diagram for the Joule Thief, the common point of the toroid is the connection at the top of the hand-wound ferrite toroid, in the upper right of the diagram.

This is the вЂњcommonвЂќ point of the coil windings. Take one wire from each pair of different color and attach them together.

Note that we have two pairs of wires: one coming out the front, and one coming out the back. Keep winding until you fit as many turns as will fit in a single layer around the toroid, typically 7-10 turns with thin insulated wire.Д¬lip the wire leads down. Keeping the two wires together, make a few more turns through the center. Keeping the two strands together, wrap them around and through the toroid again. Take the two strands of wire through the center of the toroid. To wind your own coil, start with two colors of insulated wire and a bare ferrite toroid. ItвЂ™s a little hard to see through my fingers in the video, so hereвЂ™s the detailed view of the coil and winding your own.ДЇirst, here is a selection of ferrite toroids, inductors, and transformers that are suitable for using to make a Joule Thief.Дepending on the type that you start with, you may be able to use the existing wires or need to take them off and wind it yourself.

5252f chip how to#

However, in the video we show you how to make it big, large enough (1) to make with clumsy hands and (2) that you can see what weвЂ™re doing.ДЄfter the jump, some detailed photos of how the coil is wound in case you need more detail than in the video. The original site where we learned about the Joule thief shows you how to make a miniature version of this circuit, such that you can fit it in a tiny flashlight. To learn how to make one, watch the video, which is available in a variety of formats. ThatвЂ™s well below the point where your other toys will tell you the battery is dead, so it can steal every last joule of energy from the battery (hence the name). Not only does it work with a brand new battery, but it works until the battery is nearly deadвЂ“ down to 0.3 V. But using the Joule Thief, it works like a charm. But a 1.5 V battery like a AA cell simply will not work. Normally, if you want to light up a blue or white LED you need to provide it with 3 вЂ“ 3.5 V, like from a 3 V lithium coin cell. So whatsa Joule Thief? ItвЂ™s a little wisp of a circuit that allows you to drive a blue or white LED from a low voltage.

5252f chip pdf#

The PDF file that goes with the podcast is here (450 kB PDF file). In this weekвЂ™s Weekend Projects video podcast, Make MagazineвЂ™s Bre Pettis and I show you how to make a Joule Thief.