[sdiy] flashing LED?? blinking led FLED (are they internally similar to a UJT?)

[Terry Bowman]

> On Jun 12, 2024, at 8:11 AM, Ingo Debus via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> Anyone remember self-flashing incandescent lamps? They had a bimetal strip in them. Once heated up, the bimetal interrupted the current, the lamp cooled down causing the the strip bend into the other direction, giving contact again, and so on…


Christmas light collector here. I have quite a few of those. They're becoming much less common these days.

Some of the early midget bulb strings had a flasher with a candelabra base. Some of those were quite chaotic and fun to watch. They would partially close and then start buzzing which caused the bulbs to flicker, making them less bright.


> On Jun 12, 2024, at 12:27 PM, Mr&MrsAccount <hbissell at wowway.com> wrote:
> 
> For you other ancient ones.. Remember they had "flasher buttons" that fit below the bulb in an Edison socket to turn any incandescent lamp into a flasher.  EMI anyone ???

I used one of those every Halloween. I have a big red warning light that says "Laser Radiation Present" and I used one to make it flash. Those things get REALLY hot.


Terry Bowman, KA4HJH
"The Mac Doctor"

https://www.astarcloseup.com

"If only you could see what I've seen with your eyes."—Roy Batty, Blade Runner

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