wiring LED's
- Thread starter Lyons
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brendy
RMS Regular
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- bayyngorr in the S4 Avant
you need resistors to sort it, i bought a load of leds and resistors last year for my dash but never got round to it, you need to solder the resistors daisy chained until you get the brightness you want
do a serch on wiring leds on the www i found a couple of decent sites last year..
do a serch on wiring leds on the www i found a couple of decent sites last year..
Bibby
RMS Regular
probaby have the led's soldered in the wrong way, there is a posative and negative side on themthey or 1 of them is probably back to front causing them to not light up the rest of the circuit eiher, depending in what sort of series they are wired, un solder them and wire themdirect to a 9v battery and see which end is the posative, think there is a we flat spot on the leg normally
andy_gdon
RMS Regular
You need a 470 ohm resistor if you are wiring them in series!! Also...they have a negative and positive end (long leg = postive). Are they normal LED's or high power ones? A LED only needs 0.7V to operate, any more and they will fry...never to work again!!
pm me if you need any more help!
pm me if you need any more help!
Bibby
RMS Regular
there are such things as 9 v and 12 v leds also, sounds like he boug the9 volt ones
buff
RMS Regular
or if there blue one's 3 in series = 9v each LED has a max. voltage of 3.7v
Umm surely it depends on what the datasheet of the LED says..andy_gdon said:You need a 470 ohm resistor if you are wiring them in series!! Also...they have a negative and positive end (long leg = postive). Are they normal LED's or high power ones? A LED only needs 0.7V to operate, any more and they will fry...never to work again!!
pm me if you need any more help!
brendy
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- bayyngorr in the S4 Avant
maplins catalogue has most of the specs listed.
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andy_gdon said:
give me some credit, im not that stupid!!
anyway, got i sorted out just after i posted. changed i to parallel first, but even when the switch was on (push to break), the LED's were hot to touch- never good. so i dismantled an old technology project + stole a resistor from it.
the only thing is, you can barely see the bloody things lit up, only when pitch black, with no outside lights on :?
brendy
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- bayyngorr in the S4 Avant
get a lesser rated resistor then, the colour coding on it will tell you what rating your current one is.
andy_gdon
RMS Regular
they shouldnt be dim if you are running them in parallel. that resistor seems very large! What project were you runnin it in? ill have to dig out the resistor colour code chart.
andy_gdon
RMS Regular
its a 1300ohm resistor....much too large. If you cant get sorted text me tonight. I have a load of different sized resistors lying around in my house. Also have LED holders if you need them.
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