It’s a short video of a large cylinder with hundreds of contacts and wire brushes arcing while contacting the cylinder. Controls a sign with hundreds of lights. https://www.facebook.com/61561207012586/videos/735904489084480/?mibextid=9drbnH&s=yWDuG2&fs=e
Archive for the ‘Flashers and attention getters’ Category:
2024-12-15 Hot Arcs From Flyback Transformers Play “Take On Me” by Ah-hah
Hot Arcs From Flyback Transformers Play “Take On Me” by Ah-hah. The flybacks are driven by a power amp made for driving these flyback transformers. Looks like just a few turns of 18 AWG wire are wrapped around the bare ferrite cores. A highly effective plasma speaker, better sounding than a Tesla coil. https://www.facebook.com/franzolielectronics/videos/272985324667136/?mibextid=9drbnH&s=yWDuG2&fs=e
2024-03-22 The 555 Chip Under Microscope
The NE555 and some interesting information about it. A YouTube short by @Evilmonkeyzdesignz.
2024-03-09 Big Clive’s Old Tungsten Roadwork Beacon – Barricade Flasher
I built this “tungsten roadwork beacon” as Clive calls it, using the parts given in my schematic (photo below). I didn’t have a 6V, 90 mA lamp, so I simulated it by using three 20 ohm, 1/4 Watt resistors in series, which gives 60 ohms and 100 mA load with 6VDC. For an indicator I
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2024-03-08 Some Rube Goldberg Inventions That Could Make Some Cool Projects
Mostly wood. Short video. https://www.facebook.com/reel/1099537448068091?mibextid=9drbnH&s=yWDuG2&fs=e
2022-02-19 Blinking LEDs Can Look Like They’re On Steady
Blinking LEDs are usually reset by the voltage dropping to zero then coming back on. So if one LED, probably the fastest one, blinks first, all the rest in the series string will be reset, then comeback on again when the fastest one comes back on. So you have essentially a single blinking LED and
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2017-05-04 Interrupting The Supply V to the Oscillator
I was working on the 27 MHz oscillator for testing the regens, and I thought it would be a good idea to turn the carrier off for a small fraction of a second every 1 or so seconds. So I built a two transistor flasher with a third transistor to invert the pulses. Instead of
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2016-08-20 Blue Blinky Gets A Different Timing Capacitor
It has been a long time since I designed Blue Blinky; I just wanted to update it. I have used a 1 uF electrolytic capacitor for the timing capacitor, and it works just fine with the two 680k resistors to give about 1 per second flash rate. I got a bag of hundreds of multilayer
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2014-09-07 Flasher Battery Dies Early Death
I connected a AA cell to a “Pigeons Nest” flasher more than a year ago, and used it as a trip hazard marker when it’s dark. The cell was a Kirkland brand from Costco. This had been running up until the end of August, even though I had noticed some ‘hair’ building up on one
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2014-05-15 RGB Full Multicolor Flashing LEDs
I ordered these from an Amazon seller, Liroyal-led, a few weeks ago in April. It took that long to ship from Hong Kong. They are 50 pcs of Bluecell 5mm RGB full multicolor flashing LEDs. The cost was $3.45 including free shipping. The case is clear epoxy. I looked down inside and saw four chips
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