Joined: 19 May 2010
Posts: 3973
Location: ipswich QLD
led resistor?
Hi guys
I dont know anything about resistors, but what does it mean when you connect up a resistor/led and it starts out really bright but then fades down to pretty dull in a few seconds...is it burning out? I tried soldering 2 resistors on but that didn't help either.....what is a good strength resistor for a white led running at 12v 20amp? _________________ Miles Blow - Julie Pitts
www.mulesfilm.com.au www.wombokforest.com.au
A fairly safe guide with no other information would be to use a 1kohm resistor. This is safe for most superbright LEDS @ 12v. The amps the supply power is capable of is irrelevant, but you can choose how much current to drive the LED with by selecting the right resistor. _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Thu Jan 24, 2013 11:29 am
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
If you put enough voltage up em they change colour before they die.
(greens go yellow)
though thinking about it, that may just have been the inside glowing thermally....
try something like this
http://led.linear1.org/1led.wiz
and add a bit to what it says to use _________________ Mechanical engineers build weapons, civil engineers build targets
Thu Jan 24, 2013 11:34 am
miles&Jules Experienced Roboteer
Joined: 19 May 2010
Posts: 3973
Location: ipswich QLD
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