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Topic: transistor (Read 1 time) previous topic - next topic


Nov 23, 2011, 11:20 pm Last Edit: Nov 26, 2011, 07:05 pm by jaredpi Reason: 1
Hi, I have mastered almost all electronic components that I have come across except the transistor. Will someone please send me a simple circuit that uses a transistor with a brief explanation of why it work and what it does?  
Thank you,
Jared Adams


Check out my experiments http://blog.blinkenlight.net


I have mastered almost all electronic components except the transistor

This reminds me of when I was 9 at school. I thought I had mastered all of math, where as I had mastered all the math I have ever come across, a totally different thing.
So you are OK with the unijunction, the triac, the SCR, the veristor, the quantum tunneling diode, the varicap and FPGA?

Well make a start on transistors here:-


I have mastered almost all electronic components except the transistor.

Way to go, after 30 years I still can't say that, but then I'm a slow learner :)

Rob Gray aka the GRAYnomad www.robgray.com


42 years for me... and I can't say it either.


Now, now, folks... play nice!  <^_^>. At least add some information to the leg pulling!

With the Arduino, transistors seem to be used most often to do the job that might be done with a relay, although a relay can't switch on and off as fast as a transistor can, and that is an issue in some applications, e.g. producong an audio tone. Both can be used to "switch things on and off".

The Arduino can't "switch" a big current, or a voltage of more than 5v (or 3v3 if you're using a 3v3 Arduino)

Sometimes, if the current or voltage is large, and the switching not rapid, a relay is a better "switch"... and relays are more beginner friendly, as long as you include The Diode....



When I was an apprentice (some 50 years ago) one of the favourite tradesmen sayings was "Son, I've forgotten more than you'll ever learn"

It took me a long time to appreciate what they meant and I too am of the opinion that today's "oldies" have probably forgotten more than today's youngsters will ever learn - and if the truth be known, we're still learning - but that might be because we've already forgotten it.

Yes, technology has advanced immensely but regrettably many true craft-skills have been lost, probably forever.

It makes one wonder how massive buildings were erected and empires created with "primitive" technology, slow communication, lack of transport etc


Have a look at:


it finally makes some sense.
a][+ ascii express, 110/300 novation cat, xmodem


[sic] although a relay can't switch on and off as fast as a transistor can [...]

Well, can't agree on this one... what about SSR's ? :D



A Solid State Relay is a (packaged) transistor!
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

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