High Voltage Joule Thief Schematic – In this Youtube video, we see the circuit connected to and lighting a neon lamp. I corresponded with the author and he gave me permission to post the schematic to my blog. Here is the link (it’s a .PDF). High Voltage Joule Thief The author sent me some closeup
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Not long ago I bought a Duracell charger for my cell phone. It has various adapters to fit the different power connectors, in my case it was the Micro USB. I connected my cell phone to it last night and plugged it into the wall, and this morning I went to unplug it from the
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I found a Youtube video with a two transistor circuit (some mistakenly call this a Joule Thief) that is used a a voltage booster to give 9V from 1.5V or 3V. He shows the schematic of the circuit at the end. I had a similar circuit in my late great watonseblog. But I think
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Peter emailed me with a question about Geiger Counters. With his permission, I’ll quote his questions in the paragraph below and answer them following. it´s Peter again – a few weeks ago I purchased a good, sensitive (and fully functional!!) Geigertube for measuring background radiation – the only problem is that it requires 1000 Volts.
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Quantsuff sent me a link to a Youtube video about Electrofishing. He said “Googling on Electrofishing yielded these numbers: 150-300V, 1-4A @ 16pps (15% duty).” Looks like it might be fun to build one of those gadgets. I got a Google Alert this morning about a Joule Thief, if you want to call it that,
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This power supply circuit uses a LM317 or 7805 regulator chip to do the work. The problem is that when the wiper arm of R1 is turned to the position closest to the top, it will short the output to the common or adjust pin. This will cause the R1 pot to overheat and burn
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I drew this up back in 2000 when I was developing a converter to run a 9V transistor radio from 2.4 to 3V. I decided that 9V batteries were too expensive and it would be better to make an efficient converter that would use AA cells or rechargeable AA cells. The converters worked for the
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Holy Smokes! Peanutbutter291’s experiment (Youtube vid) has gone to extremes! There must be way over a hundred dollars in the 11 LED lights, not to mention the socket to outlet adapters, power strip and 3-way taps, which must add up to another $40 to $50. I was at the Big Box store this evening and
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I got an alert with an Instructable question (pardon the poor txtng-like spelling): How would i used a joule theif and power 10 to 50 led on a circuit if i used a 5v power supply or a battery.? I wuld like to make a banner out of leds for my wife and i am
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I got an email from QS showing how he put the buck DC-DC downconverter right at the point where it plugs into the proto board. This is really the way to go to eliminate any IR drops from the resistance of the leads. There are two items which I am concerned about, one being
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