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Malalkin

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About Malalkin

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  1. Just a phone. Like my old Nokia phone from the 2000s, no special features, nothing fancy; just something I can toss in the glovebox and use if I get stranded. There's a charging port in the glovebox, so no need to worry about the battery dying. Apparently the 3G towers in my area are shutting down next year, so I'll need something that can meet the current standards. Where can I get a very basic, cheap, fundamentals-only emergency phone? Everywhere I look, I can't find something basic. All I've turned up so far is some cheap 'Alkatel Go Flip' which looks like it wo
  2. Didn't know about most of those things. Although the second image is a ferrite core (it's just wrapped in plastic). Thanks for the link. To be clear, I am trying to build something of a boost converter, just one that doesn't destroy itself. My previous project was a 555 timer creating a square wave which went into a small 300:1 transformer and then a voltage multiplier network to yield about 200 volts. It was ridiculously large and inefficient.
  3. Now the ratio is 4:9 on a torroid, but the output is still 1:1. Although there's very little copper in play.
  4. Here's basically the schematic from wikipedia: The windings on the transformer are the same resistance so it's probably 1:1, but anything I found online didn't seem to specify anything about winding ratios for joule thief devices. Do I need a different transformer/coil then?
  5. I mostly wanted to just build a joule thief to prove a point, but I was thinking in the future I could play around with it and try boosting the output enough to charge a 200V capacitor using a dead battery
  6. I'm using only electronics I pulled from an old TV. I followed the schematic from wikipedia as well as I could, and I'm about 90% sure the coil is going in the correct direction. But for some reason if I feed it 1.4V, I get 1.4V out (before the diode, so my capacitor only charges to 1.1V after the diode). Transistor: C945P (tried swapping the transistor to no avail); looking on the flat side, the pinout is emitter-collector-base. Resistor: 810 ohm Inductor: I don't know what the inductance is, but there's a '12' written on the side and the top has the numbers 47E00-01
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