How to Record the Screen on Your Windows PC or Mac.How to Convert YouTube Videos to MP3 Files.How to Save Money on Your Cell Phone Bill.How to Free Up Space on Your iPhone or iPad.How to Block Robotexts and Spam Messages.Take a piece of that wire you had earlier and solder it to the transistor's emitter. Solder the positive side of the LED to the collector as well, and solder the negative side to the emitter.Īll that's left to do now is solder an extension wire to the negative side of the LED. Take the other single wire from the toroid, and solder it to the collector of the transistor. Solder the other end of the resistor to the middle lead of the transistor. Take one of the wires coming from the toroid that is alone that is, not twisted together with another wire. You don't have to, but it makes it easier to solder. They explain it very well.įirst, take the two outer leads of the transistor and bend them outwards a little ways, and bend the middle lead backwards. You can follow these written instructions, or take a look at the pictures. You could put it on a board if you like, but in this Instructable, we're going to free-hand solder it. Now we are going to solder the whole thing together. Twist them together, and then you're done with the toroid. Strip some insulation off the wires, then take a wire from each side, making sure they are of the OPPOSITE COLOR. Once you wind around the whole toroid, cut off the extra wire, making sure you leave a couple of inches for soldering. Make sure the turns are spaced evenly around the toroid. Even if you can fit more, don't put more on. Ideally, you want about 8-11 turns on your toroid. It will still work if they are kind of loose, but it is better to have them tight. Keep winding, making sure you wind the coils tight. Don't twist the wires make sure that two wires of the same color are not right next to each other. Thread the twisted end through the toroid, then take the other two ends (Not twisted together) and wind it once around the toroid. You don't have to do this, but it makes winding a little easier. Take your two strands of wire, and twist the ends together. You can find toroids in computer power supplies, or you could buy them at your nearest RadioShack. Old computer motherboards, XBOX and X360 motherboards have them (don't take them unless it's dead!). Toroids are donut-shaped objects like in the picture, and can be attracted by a magnet. I found mine in an old computer power supply, and it works fine for me.
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