Pulsating LED

[Shai Szep]

Hi all,

I have an 82 coaster and I put together some day driving lights. Problem is, they pulsate. With my limited knowledge, I think I need a Capacitor in parallel, though I wouldnt have a clue as to what value Id be looking for? I looked around and it seems like Id need to read a whole book on Caps to understand them. So I was wondering if someone could at least give me the equation? I dont have the head for in depth learning at the moment sadly...

Thanks

 

[Marvo]

What components did you use in the lights? Why do you think you need a capacitor?

 

[telectrix]

use 'em for trafficators.:49:

 

[shanky887614]

Hi all,

I have an 82 coaster and I put together some day driving lights. Problem is, they pulsate. With my limited knowledge, I think I need a Capacitor in parallel, though I wouldnt have a clue as to what value Id be looking for? I looked around and it seems like Id need to read a whole book on Caps to understand them. So I was wondering if someone could at least give me the equation? I dont have the head for in depth learning at the moment sadly...

Thanks

are they bright enough at there lowest brightness or diming very low?

sounds like you havent got a steady voltage

 

[Shai Szep]

I understand a capacitor can flatten out unsteady current...

They are plenty bright! I just not to smooth out the current.

 

[telectrix]

a capacitor will have no effect on a supplied d.c. voltage. it will only smooth out irregularities on a voltage derived from a.c.

 

[Farmelectrics]

check your connections

 

[Shai Szep]

I tried a clear good earth and a second voltage supply. To no avail! So if capacitors will only smooth out ac, then what will smooth out dc?

 

[davesparks]

DC should already be smooth, if it isn't the power supply needs looking at

 

[shanky887614]

it sounds like the voltage is fluctuating up and down. a voltage regulator would work

 

[Shai Szep]

It even flickers without the alternator running. Though it works fine on a 12v battery :/
I tried a voltage Reg, no help...