Transistor circuit

electronic novice

Member

• Jan 11, 2012

• #1

Hi. I'm looking for a simple circuit diagram that requires three transistors as main component. Thanks.

 

Last edited: Jan 11, 2012

S

simonbramble

Active Member

• Jan 11, 2012

• #2

What do you want the circuit to do?

 

electronic novice

Member

• Jan 11, 2012

• #3

anything

 

S

simonbramble

Active Member

• Jan 11, 2012

• #4

this was one of the first circuits I ever built:
https://resoundingthemuse.blogspot.com/2011/02/transistor-oscillator.html
You can make the circuit oscillate fast (and hence create a sound). this requires it to oscillate over about 100Hz. Or you can make it oscillator slow and flash some LEDs.

There should be plenty of stuff out there telling you how it works.... and you have a spare transistor left over...

 

electronic novice

Member

• Jan 11, 2012

• #5

I could only see 2 transistor being used there.

 

MrDEB

Well-Known Member

• Jan 12, 2012

• #6

just add the third to the output seems easy?

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Jan 12, 2012

• #7

I use three transistors in my current convertor...

 

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alec_t

Well-Known Member

Most Helpful Member

• Jan 12, 2012

• #8

How about this?
https://www.electro-tech-online.com/threads/cell-phone-parts.459/

 

ghostman11

Well-Known Member

• Jan 12, 2012

• #9

one the members here (colin55) has a site with a ebook on it that has 200 (i think) transistor circuits. i once had a quick scan thru it and i am pretty sure there is a touch switch swith circuit there that uses 3 transistors. if not i am sure somewhere in that ebook is a circuit you could use https://www.electro-tech-online.com/custompdfs/2012/01/101-200TransistorCircuits.pdf

actualy the book i have linked 2 appears to be book 2! there is also a book 1 on the site so around 400 transistor circuits!!!! just had a quick peek through book two and there are plenty of circuits that should fit the bill! good luck let us kbnow how you get on

 

Last edited: Jan 12, 2012

electronic novice

Member

• Jan 17, 2012

• #10

many thanks

 

electronic novice

Member

• Jan 19, 2012

• #11

is there any available 17v DC supply?