Must be those new white LEDs. Never used them.
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Must be those new white LEDs. Never used them.
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Hi, Trent
Buuuuuut,
you forgot the BC 337 base is @ 5v level !!!
so, Emitter is @ 4.4v !
4.4 - 3.2 -3.2 = - 2v !!! LOL
The leds NEVER give any light !!! ...
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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It's an NPN transistor, meaning the base must be at 0.6V greater than the emitter in order for it to turn on. I too fail to see how it would ever switch on if those LEDs are in fact 3.2V types.
Last edited by T.Jackson; - 15th October 2007 at 11:56.
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Hi Guys,
The circuit as I posted works fine with more than 5 volts on the base of the transistor, fully bright LEDs.
Yesterday, I did a new PCB with the BC337 placed between cathodes and ground and now they work just fine with the PIC.
Thanks for your help! Btw, I'm a software guy, sometimes electronics beats me.
Daniel.
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Hi Guys,
I owe you a pic and a video of the final product, a "neon light" for my street R/C car...
I made two of them, one for each side... Maybe I will make one for the front and one for the back with less LEDs...
The software is not finished yet, just a test to see how it works... The idea is to generate different patterns according to the throttle/break signal given to the servos...
Regards!
Danie.
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