Hi, why transitors have 3 legs?

I know your intellectually challenged so I'll attempt to keep it at a level you can better understand.

Dingleberry.

Jamie

Kind of pointless to use lead-free considering what's inside the RTGs.

--
Keeping with the terminology used in this post, "legs" is equivalent
to "leads", the point being that in the phototransistor described, as
in an LDR, there are only two electrical connections available to the
outside world.

Does the tab on a TO-220 count as a leg?

obviously relevant fact, and he reacts as if he is being personally attacked - at some level he must realise how stupid he is, and he's too stupid to avoid admitting it.

--
PKB
Answering an over 600 line post with 5 lines, and not trimming, is
hardly productive.

--
Did you miss that he comprehended what Sloman was pointing out and
judged in favor of his point?

On a sunny day (Sun, 1 Jul 2012 12:19:47 -0700 (PDT)) it happened Father Haskell wrote in :

It is not only tin, but also cadmium, and zinc, that grows whiskers. Maybe more?

238PuO2

Alpha emitter. Paper bag should keep everything inside. Not fissile.

As long as you don't actually ingest any ;-)

--
"For a successful technology, reality must take precedence 
over public relations, for nature cannot be fooled."
                                       (Richard Feynman)

You can make one by filing off the end of a metal can

2N2222, exposing the now unsealed junction to light. Practical use requires gluing on a dust-proof window, which makes the TEP cheaper. Or, you can use an LED. They're capable of generating 1 volt if pointed directly at the Sun, though probably at very low current.

--
It should be: "I know you're"...

You must live in a small, isolated neighborhood if you can say that with a straight face. Art

They apparently did since they are failing due to tin whiskers.

MY point was that they should have stuck with leaded solders. Your remarks leave unclear what the point you are trying to make is.

--------

While Larkin again attempts and fails at coming up with an error he can attack those who have him pegged with:

-------- Which brings us back to your again 100% correct "correction":

Larkin gets PWNED AGAIN!

--
Indeed. ;)

http://www.google.com/search?aq=f&sugexp=chrome,mod=18&sourceid=chrome&ie=UTF-8&q=transistor+legs

The Cadmium alloys of the 50s did NOT pose 'whisker' problems for the industry. They SOLVED problems.

It took idiots crying "carcinogen" about what happens when they lay their grubby hands on plated items to get them banned. Same thing with Berylium Oxide ceramic heat sinks. You can touch it, but do not touch it to an open wound or to your circulatory system. Basically just don't touch it!

Cadmium alloys had benefits not whiskers. PURE Cadmium surfaces exhibit crystalline growths.

There is no Zinc in space devices, idiot.

I remember the transition and the LOSS of solderability on potentiometer leads, etc. in the industry, and I was in QA at a major mfgr at the time (Lear Seigler)

You have to admit that his sig fits him perfectly though.

He'll never get what you just told him.

Must be those "highlands" where he is considered to be so "technical".

Mr. Larkin is so dumb, he cannot even have a leg up on a dung beetle.

Oh... that's right... he IS a dung beetle.

Hey, Jackie, do you refer to transistor leads, or IC pins, as "legs" ?

Do you say "it's a 16-leg DIP" ? Insects have legs. I've only heard amateurs say stuff like that. I've never seen a datasheet or appnote refer to "legs." Of course it doesn't matter; you can say "spindles" or "shanks" if it makes you happy.

Maybe JF refers to transistor leads as "legs."

--

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

I don't think I've ever seen a datasheet that referred to a semiconductor with "legs." Have you?

--

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