how to DIY undercarridge LED light?

[wyx]

Better way to drop voltage for LED load is to use zener diode. Parallel a specific rating zener diode to your LED array to get constant 6Vdc. Series the whole circuit with an appropriate power rating resistor to limit the total current flow as well as the inrush current. LM317 regulator may be overkill in this application (driving LEDs). Moreover, it will consumes same amount of power as your load is consuming.

 

[yongfei]

wah...u guys really ngeng in DIY.....pui fook pui fook

 

[chilskater]

update please..

after this we do nightrider led..okay?

 

[khguan]

night rider LED can buy the DIY project kit from pasar road... all the components inside already... u just need to think how to wire the LED nicely only...

 

[liauchinfoo]

Hi all, I'm a newbies here.
Dun know there is still any discussion on this topic. I just bought a 12V 8 Super Bright Blue LED, which is water proof to fix it under my Iswara A/B. They say just connect the switch to the dome light, when open door will light up the LED.
I'm thinking of another cool method to light up the LED. When I open my door lock alarm, it will light up, and it will only fade off slowly when I turn my car key to "ON" position.
Any sifu/guru here to shade some light on my idea?

 

[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.