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What do you have against PUTs? I think I may have one UJT, I ran across something and just looking at it I was thinking about picking up some of those. You can do a pretty good simulation of them with

On my server I'm pretty sure I have the "GE Glow Lamps" manual. If it's not on my web site I can put it up there. I remember that company, though it's been a really long time since I've thought of

That's funny because my first exposure to a dictionary was one from Encyclop?dia Britannica -- and the associated set of encyclop?dias didn't give me much training in American spelling either.

It seems that DIAC could be seen as two Shockley diodes connected in anti-parallel.

Polychlorinated biphenyl is often called PCB. Scary stuff according to the Wikipedia article about it.

bbbOn Mon, Nov 4, 2024 at 05:58 PM, wn4isx wrote: I think you mean *PCP* , not *PCB*.? PCBs are mostly harmless - although they might not react too well with multi-KVs unless they are clean.? PCP,

Thanks for reminding me. It is about 40 years old so that is a very good possibility. Bertho Sent: 4 November, 2024 17:59 To: [email protected] Subject: Re: [electronics101] LED Flasher circuit

This thread brings back many memories about strobe tubes. Decades ago, I used to work on big industrial YAG lasers. The YAG bar was strobed by an intensely bright light flash for producing the laser

I used to know, but perhaps I am wrong, that the "avalanche mode" has a negative resistance after breakdown. It is not the case for "zener mode". So, if the junction BE of a transistor at breakdown

I never heard of an NE-1, which I thnk you've mentioned more than once. I know NE-2 (wire leads), NE-51 (bayonet base) and the H (high brightness versions) of these. I also recall NE-45, which was a

I seem to recall a part that was popular back when, called the "LDR-25", the letters standing for Light Dependent Resistor. And the numbers meaning that the thing could dissipate 25 watts? There were

They still seem to be fairly reasonably obtainable from various chinese sellers, on ebay, etc. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this

An important distinctions, there. Neither have I. I do remember them showing up in various magazine articles, though. One that comes to mind was by Don Lancaster and had the diode stimulated at some

I hadn't really thought of CdS as a semiconductor... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be

Your comments remind me of using the avalanche mode to drive MHz ultrasonic transducers over 40 years ago. The DC supply was about 300 V and the pulses in the ns range. I controlled the base voltage

wn4isx wrote: Why not? Whether you call it "avalanche mode" or "zener mode", for most of us engineers that is less important than the fact that it breaks down due to reverse voltage across the

If I'm not mistaken, these days CdS photocells may be hard to come by.? They are toxic (HIGHLY toxic, I am told) and I think have been banned for a while now in most parts of the world. Bummer. Andy

wn4isx wrote: Note, by the way, he is talking about a *Shockley* diode -- *NOT* a *Schottky* diode.? They are rather different beasts, named for different physicists. I never ran into a Shockley

FYI - The first time I saw this effect described as if it was a "new" (previously unknown) effect, it was in a Youtube video where they had access to a curve-tracer and other lab equipment.? The fact

I am guessing that the reason for building that circuit, was to see that it does what they say - not to make a LED flasher per se.? It exploits a rarely utilized (and usually but not always harmless)