how to DIY undercarridge LED light?

[minikar]

Can any1 tell me where to get 12V LED? last time I asked at Jln Pasar, nobody know PM me.

liauchinfoo: u just need to rewire ur alarm unit to the light. To add to the coolness, buy a delay switch at Jln Pasar, so ur light ON for awhile (several tenth seconds) b4 it switch off, light all the BIG car.

 

[liauchinfoo]

minikar: Thanks. I bought it for RM25 with 8 LEDs and the wire harness. If you want to know just PM me lar...BTY, any detail guide on how/which wire to connect to my alarm? at which part/location of the car?
For the delay switch, how much? Penang can found? Is it a delay relay type of switch? Need to add a capacitor and diod to protect it? Any fuse needed?

 

[minikar]

Trace the wire from the alarm unit to your car's city light/ signal light, rewire it to you light. Your car alarm unit normally is under dashboard, driver side.... , normally there is a red LED and a alarm disable switch coming out from it.

Bout the delay circuit, I recom u buy the DIY kit from electronic shop, it costs arount rm30. Selling in Jln Pasar, Penang should hv.

 

[jeffrey24]

hi hi...newbie here...just a question to khguan sifu, i bought the night rider DIY set from psr road....notice that it only receive 9V ,as i want to connect the wire to the Autogauge meter that having 12V ....how to "bring" down the voltage so that the LED set won't burn out? wat electronic component that i need....?? TQ TQ......

 

[minikar]

Well, to answer that you need to know how much power ur thing consumes (ampere).

What to add to reduce the curent, still a debate. You can add either:
1. Resistor
2. Diode
3. Zener diode
4. Transistor
5. Transformer

Actually all the answers are correct, the consideration is how long u will operate ur night rider eye each time? If long, you might need to consider option 3, 4...5 coz ur circuit get heat over long period of operation

 

[jeffrey24]

Thanks for ur explanination ....minikar.... but i've ask several shop at jln psr regarding "bring" down the voltage......all of them also dunno.....

 

[minikar]

My experience, i f u wanna get technical info, dont go to the main road shop asking the showing 1/4 balls person, go 2 the shop at the sideroad that do repair as well, the uncles hv more technical knowhow.