I’ve talked about this before: the Joule Thief has certain vulnerabilities that need to be considered when making a new design. Suppose we build a simple conventional JT, with a single LED and a 1.5V battery. The coil has two windings, each the same number of turns, probably wound bifilar – the windings are wound
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One of the favorite devices of the ¨free energy¨ experimenters is the disposable camera flash. These circuits can be obtained for free from the local stores that process the disposable camera pictures (I got mine from Rite-Aid). However if you don´t wan to ask your local store for some free ones, you can buy them
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In the RegenRX2 RegenRX Yahpoo group, an overflow group for RegenRX, WU2D posted RegensWU2D (a PDF file), showing two two transistor regenerative receivers. The first one, “Bipolar Two”, shows the schematic for a two transistor receiver using a NTE108 for the regen front end and a 2N3904 for the audio amplifier. The NTE108 is a
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I assembled a two transistor LED driver buck converter for dropping the 12V input down to the 3.2 volts needed for the LED. My problem seems to be that the circuit wants to act like a simple 22.2 mA current limiter, as if I took out the inductor and capacitor (the D1 is reverse biased
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From Watsonseblog Jan 2010: Very odd LED dropping resistor – edible! There are several others of the same genre on Youtube but this one has LEDs. Cool, an edible resistor! I remember that the stores sold a hot dog cooker that was just s simple box with a drawer and electrodes. It took about a
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This circuit was posted to the files section of the Yahoo group Joulethief (you may need to join to see this). I´m going to try to attach the pic but I couldn´t do it earlier, You might also be able to see the picture here. I built four versions of this circuit and made some
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I was reading a post from a school teacher about wanting a subject for the class project. Bingo, I thought of something that had not really come up before: “How much does it cost to make a Joule Thief?” I guess it would be best to start with a BOM, or Bill of Materials. The
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The 2N2222 and 2N2222A comes in, and has always come in a metal can package. The manufacturers came out with an equivalent that was much cheaper because it does not have the metal package, it’s a regular TO-92 epoxy package. The 2N2222 and 2N2222A specifications require a metal can package, so the manufacturers named the
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It will work with a few hundred millivolts.DAMASCHKE-064a-97ia-jmd
I see a number of good designs for vacuum tube (thermionic valve) regenerative receivers in the Yahoo group Regenrx. Tubes are hard to obtain and notoriously inefficient; reasons why they would be my last choice for a receiver. But one area they have a big advantage is for use in a ham or SWL receiver
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