10 Leds For Status

i have a alpine sec-100s currently with one led, and i want to have ten total. in the manual it says i can only have 5 in series and not in parallel. how can i have all 10 working? props for any help

With only 12V driving the LEDs you probably won't be able to drive 10 LEDs with a series hookup to full brightness, because that only gives each LED 1.2V, which isn't enough.

If you want to drive 10 LEDs, you'd have to break up the connections into at least two strings, with 5 on each side, and you'll need to use an external current source circuit, since your module only outputs a fixed current at 12V.  You can use a few transistors in a current mirror configuration for that-

Are you sure you're hooking up your 5 LEDs in series, when you say they don't light up that way, but one LED does?  It has to be end to end, and make sure they're all pointing in the same direction, because if you have one of them backwards, they won't light up at all. 

Make sure the LEDs you're trying to use are bare LEDs also; if they have built in dropping resistors and are intended to be driven by 12V directly, it won't work in the series configuration you're using. When your one LED is on, measure the voltage across it to see what you get; it should be under 3V.

it was 10 leds and a circuitboard to make it scan when 12volts was supplyed, some one gave it to me and the cicuitboard was fried so i wired them up without it. they are bare leds.dualsport how can i make that external current source circuit.

thanks