This is a continuation of the 2013 Dec 18 blog. It was getting too long, and so is this blog. Update Dec 24 – I searched for high current pulse gen schematic using Google and I didn’t come up with anything near enough to what I’m looking for. I saw a lot of high tech
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I got a frigid greetings by email from Kirk, where it’s a bone-chilling -20 deg. F in Winnepeg, CA. He’s building a similar device to find a misplaced object. I have a few other Ideas I’d like to go over. The Blue Blinky uses a Joule Thief circuit, which works with any color LED
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Last month, on Oct 23, I connected a fresh LR44 button cell up to one of my two transistor flashers. It ran up until Nov 18 for a total of 26 days. That’s about 624 hours. Assuming that the LR44 has about 150 maH capacity, then the flasher is drawing about a quarter of a
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I added a 1 Farad capacitor to the Xee2 flasher circuit I blogged. I left the 10000 microfarad capacitor connected, but this is only 1 percent of the 1 Farad capacitor so it really doesn’t make any difference. I used my LED task light to illuminate the 4 LEDs and charge the capacitors. I connected
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My recent two blogs on powering a flasher with four red LEDs used a flasher made by modifying a Joule Thief. It works fine, but it requires a toroid core and wire; the flasher I blogged earlier does not require any inductor. It is a switched capacitor or charge pump,. and it works okay with
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In my earlier blog, yesterday I discussed using a 1 Farad capacitor to hold enough charge to run the flasher for several hours, from dusk to midnight or later. I checked Mouser’s parts and found a 1F 2.5V capacitor from Bussman for about 2 dollars in single unit quantities. Kind of expensive but cheaper in
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I’ve seen a lot of Xee2’s xee2vids on Youtube, but I don’t remember seeing this one before. It’s dated Sept 2011, so it’s more than 2 years old. The Joule Thief flasher obtains its power from four red LEDs connected in parallel, which are used as solar cells and charge a 10 thousand uF capacitor.
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