Subject: Re: Best way to power array of LEDs?
Date: Sat, 5 Oct 2002 8:19:15 -0700
References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <email@example.com> <firstname.lastname@example.org> <email@example.com>
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On Sat, 5 Oct 2002 1:57:01 -0700, Wouter van Ooijen (www.voti.nl wrote
(in message <firstname.lastname@example.org>):
>> The LM317 has a minimum current which may be greater than a single LED
> My datasheet says 10 mA. What kind of LED do you have in mind?
>> the biggest objection to using the LM317 is that they cost a buck or two
> The problem with discussions like this is that the original question
> did not state what the main objective should be:
> - minimal power use
> - minimal cost
> - most simple circuit
> - minimal brightness variation
Probably minimal brightness variation it tops, followed immediately by
reasonable cost. I don't mind spending 10 bucks on support circuitry, if
Power consumption -- less than 75 watts?
Note that this circuit won't be powered all the time, only when the brake
pedal is pressed. Can the LM317 function with minimal propigation delay (ie,
powering up and regulating) every time the pedal is pressed?
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