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[DPRG] 555 PWM resistor capacitor calculation
Subject: [DPRG] 555 PWM resistor capacitor calculation
From: DeltaGraph at aol.com
DeltaGraph at aol.com
Date: Thu Feb 21 19:04:31 CST 2008
How many LEDs or how much current?
I found this link real quick.
_http://www.kpsec.freeuk.com/555timer.htm_
(http://www.kpsec.freeuk.com/555timer.htm)
Maybe try searching for "driving led 555 high current"
Talks about sourcing or sinking 200mA directly with 555.
I you need a lot more current, the MOSFET used in DPRG is a real nice way to
go.
The above search quickly located example circuits using common NPN
transistors.
Ron
**************Ideas to please picky eaters. Watch video on AOL Living.
(http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/
2050827?NCID=aolcmp00300000002598)
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