This is a photo of an ancient Dressen Barnes power supply from the 1950s. It uses germanium transistors throughout. Some of them are located on the other side of the board, and the only thing that can be seen are the nuts holding them down and the two holes where the leads pass through. Some
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Have you read the Joule Thief topic in Wikipedia? I think it’s poorly written and lacking in comprehensive information,. It reminds me of the blind men and the elephant: one blind man felt the elephant’s trunk and said the elephant is like a snake; another blind man felt the elephant’s tail and said the elephant
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Check this out. Want to make a million dollars? Just start selling short USB A female to A male adapters that have only the power pins connected so that only power connects to the phone. Like, why didn’t someone think of this before?
Boffins = scientists in UK speak. http://www.theregister.co.uk/2012/03/14/neutrino_comms_demonstration/ People don’t realize that the Sun generates a huge amount of neutrinos, and every second, 65 billion of the little particles shoot through the area the size of your little fingernail, no matter where you are, because neutrinos go through the earth (and you) like it wasn’t (and
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This is a new one for me. Ten thousand dollars starting bid for a lot of obsolete ferrite core memory beads, made in East Germany. Maybe someone might be able to afford the shipping, if they live in Germany. You had better hurry up and bid before someone else gets them. 🙂
I received a Google Alert for a Joule Thief schematic. They said that it is self resonant, but in order to be self resonant, there must be a tuned circuit with a capacitor and inductor. It’s really quite simple. There is no capacitor, there is no tuned circuit, and the circuit is not self resonant.
Quantsuff sent me an email with this link, a for real COP > unity device. Well, I’m not so sure. You see, if it has to be used with the external heat contributing to the light output, then it really isn’t greater than unity, it’s just drawing energy from an external source. TANSTAAFL. I had
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I looked at the photo in the Yahoo Group Joule Thief, and saw that it was working, but then I noticed that the BC337 transistor looked like it was backwards. I had to look at it again to make sure that I was seeing it correctly. Yup, it looked like it was in backwards, but
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I found an invention that I think is worthy of investment. The guy has a really amazing invention, and needs the money to get started. And it has to do with LEDs – cool! Actually, you don’t have to invest much, a dollar or more, or buy the T-shirt as I did, or more if
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The Antique Telephone Collectors Association annual show took place yesterday at Placentia Presbyterian Church, Placentia CA. I got a few good pics of the stuff. Those blue and white roundish “Public Telephone” signs are selling for $500 to $1000 apiece. Just think of all the money one could make if they had collected a bunch
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