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Topic: What transistors have around a 2-3v turn on (Read 851 times) previous topic - next topic

fillbob1

Thank you!
I'm trying to make some LEDs blink to the music right from the speaker to make a cool LED show.
Would/should I use transistors, MOSFITS or something else?
I plan on just using transistors should campasistors be used too, I don't really know
but what would the scamitic look like?

please help!!
Thanks!

majenko

In what way do you want the LEDs to blink?  How are you thinking of connecting them up to the sound source?


Grumpy_Mike

In reply to the title all bipolar transistors turn on a 0.7V.

In reply to the body:-
http://www.arduino.cc/playground/uploads/Learning/solenoid_driver.pdf
Just put your LED and resistor in place of the solenoid.

Nick Gammon

http://www.thebox.myzen.co.uk/Tutorial/LEDs.html

Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

fungus


Thank you!
I'm trying to make some LEDs blink to the music right from the speaker to make a cool LED show.
Would/should I use transistors, MOSFITS or something else?


It depends on how complicated you want to make it.

You can get LED driver chips that do it quite easily:

eg. http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1313&_nkw=KA2284&_sacat=0&_from=R40

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

retrolefty

Quote
should campasistors be used too


I don't think campasistors are due to be invented until sometime next decade.  ;)

Lefty

Docedison

@ Lefty... That was covered in the NDA you signed.., You'll be hearing from the Secret Police.. Secret Division...

Bob
--> WA7EMS <--
"The solution of every problem is another problem." -Johann Wolfgang von Goethe
I do answer technical questions PM'd to me with whatever is in my clipboard

majenko


@ Lefty... That was covered in the NDA you signed.., You'll be hearing from the Secret Police.. Secret Division...

Bob

If they're that secret, he won't be hearing from them.  No one will.

Shhhh.....

BulletMagnet83


Quote
should campasistors be used too


I don't think campasistors are due to be invented until sometime next decade.  ;)

Lefty


I dunno... some of the tropical fish caps look pretty camp to me ;) FABULOUS colours.

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