24 Feb
2010
24 Feb
'10
2:40 p.m.
Hi
I was thinking about the capacitor dropper for the LED.
One could add yet another diode and a capacitor that would be
large enough to absorb any inrush if turned on at peak.
You'd put the new diode in series with the LED and
the capacitor in parallel with the LED. The other
back diode would go across both the LED and new diode.
Dwight
From: cclist at sydex.com
To: cctalk at classiccmp.org
Date: Wed, 24 Feb 2010 14:17:19 -0800
Subject: Re: OT: white LEDs (was: Re: Solderless breadboarding (and 68010 vs
Using capacitive reactance to drop AC line voltage is still alive and
kicking in this design for a PWM controller, where a PIC is run from
line current. At the very least, I'd add a fuse to keep the fire
danger down:
http://tinyurl.com/ygr9vz7
--Chuck
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