Hi, why transitors have 3 legs?

Jun 29, 2012 310 Replies

spares.

A high school friend ended up being a watchmaker. He showed me some of the "23 Jewel" movements that were in reality, a cheap, standard, 17-jewel movement with six "jewels" taped to the back cover. Then there're the Rolez watches, sold on some of the best street corners in Manhattan.

What's your problem? Little jealous because your mental faculties are no challenge for JK ?

Jamie

JF been hanging on the net for to long.

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Yup, I think his problem is, he still in hippy land!

Jamie

We only referred them as legs in cases that support themselves..

For example:

TO-92, where when solder on the board, they become the supporting member that holds/stands the package. In which case, we may refer to them as legs.

Any other case, where the package does not require the support of the leads as legs, they are then leads or pins.

say it as you may, when some one says legs, I assume a free standing package via it's leads.

Jamie

So a DIP or even an SO package has legs? A QFN must, too. By that reasoning all passives have legs, even SMT. Nope, not buying that difference, either.

Call them legs if you like, but it IDs you as an amateur.

John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

What's the sunflower doohickey?

It was a photo, idiot. The photographer doesn't matter and he did not write the caption either.

I got it from a page about Fairchild semiconductor.

You know... the FIRST IC chip maker.

You lose... again... idiot.

For him it's "if you like", but me and John are "amateurs", right, Larkin?

You are transparent, boy.

So you disclaim knowing everybody here that is playing the game.

?-)

Delay line, first step experiment for a picosecond arbitrary waveform generator. It evolved into this

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and finally this:

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The idea is to sum gaussian impulses, timed by delay lines, to make an arbitrary waveform. Brute force.

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Fun stuff. It's sort of cheating, taking the tail end of Shannon's Sampling Theorem.

John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

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Leads, legs, pins, terminals, dohickies or whatever; the term used don't mean squat so long as clear communication is achieved.

?-)

Not always. Depends on the context.

?-)

Dang. You are really being a pedantic prunt about this.

?-)

Same thing.

Who knows? It's mostly for educational value.

Light meters, otherwise, like I said, probably not much output power from running a low current device in reverse.

Don't you mean valves? :-)

They have pins, not leads. Which of these sounds wrong: "U7 pin 3" or "U7 lead 3" ?

They usually use simple numerical reference designations, i.e. "Q1-1" "U7-3" etc., so your question is specious.

I'm an amateur because, instead of forcing everyone to comply with my version of what's acceptable wording, I discuss the matter with wording already in use in the thread?

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