Originally Posted by Porkchop2oo2
what do you mean by daisy chain? and yes each led is rated at 20ma and enough resistance to plug it into a 12v source. if i do it from one led to the other wouldnt that be a series circuit causing the led's at the end to be dim or not lit?
yes i have a light fixation ^_^
In series wiring the forward voltage drops are additive, but the current requirement stays the same..........for example, if each red led has a 2 volt forward voltage drop and a maximum 20 milliamps, and you put 2 in series, then you will need 4 volts at 20 milliamps to drive the leds to maximum brightness........If you had 6 red leds in series, then 12 volts at 20 milliamps is required
: Power -> LED1+ -> LED1- -> LED2+ -> LED2- (etc) -> Ground
In parallel wiring, the current requirements are additive, but the voltage drop remains the same; for example, if each red led has a 2 volt forward voltage drop and a maximum 20 milliamps, and you put 2 in parallel, then you will need 2 volts at 40 milliamps to drive the leds to maximum brightness........If you had 6 red leds in parallel, then 2 volts at 120 milliamps is required
: Power -> LED1+,LED2+ (etc) -> LED1-, LED2- (etc) -> Ground
If you had LED's without resistors I would say series them up to 15v (since cars don't always run at 12v and you don't want to blow the whole cluster when it goes above 12v and mine frequently sees 14.8v) then parallel 15v groups together.
With the led's you got your only option is parallel and you'll need 420ma for it to light up fully. I'm sure you could get a circuit board, but you can just go around the cluster connecting all the + with wire and all the - with wire then tapping into the vehicle light source and hope it puts out 420ma.
power -> LED1+ -> LED2+ -> LED3+ -> ... LED21+
LED21- -> LED20- -> LED19- -> ... LED1- -> Ground