9 volt to 3 volt circuit help needed

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sciford
Posts: 1284
Joined: Sat Jul 13, 2002 3:19 am
Location: Isle if Portland, the Jurassic Coast, England

9 volt to 3 volt circuit help needed

Post by sciford »

I have a simple, 3 volt strobe circuit that uses the old LM3909 component. I put it together years ago. Is there any way I can get this to work on a 9 volt wall wart voltage? Just adding a resistor in the forward 9 volt path doesn't do it. Any information would be greatly appreciated. Thanks :)
"Still crazy, after all these years". (P. Simon)
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TimeScape
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Joined: Sat Oct 05, 2002 3:38 pm
Location: Ottawa

Post by TimeScape »

Voltage regulator... :D

Check this article out.

http://www.egr.msu.edu/classes/ece480/c ... onNote.pdf
Never try to teach a pig to sing.... it wastes your time and annoys the pig.
Ant
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Post by Ant »

Hey Chris- any reason you don't want to use batteries? The 3909 was specifically for low power drain circuits.... runs great on batteries.
sciford
Posts: 1284
Joined: Sat Jul 13, 2002 3:19 am
Location: Isle if Portland, the Jurassic Coast, England

Post by sciford »

Thanks Timescape for that information. :)
"Still crazy, after all these years". (P. Simon)
sciford
Posts: 1284
Joined: Sat Jul 13, 2002 3:19 am
Location: Isle if Portland, the Jurassic Coast, England

Post by sciford »

Hi Ant, yeah, I originally built it to run off 3 battery powered volts...But the rest of the kit I want to run it with of is wired at 9 volts...needed to light the 9 volt led strips. It took me a while and a bit of internet searching but I did manage it in the end this afternoon - I wired 5 LED's in series in front of the flasher unit input. This provides enough resistance to drop the voltage and still keep the strobe effect of the led's intended to be momentarily lit (my current Sith Infiltrator build).
Cheers
:)
"Still crazy, after all these years". (P. Simon)
Ant
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Post by Ant »

Ah that makes sense then!

And a creative solution!
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