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Need Help with Strobe controller speed

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Ok so i bought this LED 12v strobe controller and it does what i want, flshed 1-1-1 to the left output and 1-1-1 to the right, but it does it slower than id like, so i opened it and it looks like something i could alter, i took pictures and hopefully somebody can interpret this circuit and tell me which capacitor(s) and or resistor(s) to change i also posted a video of how slow it is id like it to flash at the speed of a police strobe

IMG_0494.flv video - Photobucket
 

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homik

New Member
I see there is a trimmer on that circuit (the blue part with a white cap that has a flat-head groove in it) try turning that and see if it speeds up.
 

ronp849

New Member
What is the vertical board on the left hand side - it has several connections to it. The black blob could house an IC controller etc in which case the timing is likely to be in software.
 

Boncuk

New Member
There are two "blind" spots labelled 470Ω, and instead of R9 there is a wire jump.

Track the connections and find out if one of them is connected to the variable resistor.

Check all other resistors being connected to the pot. I'm sure there is a fixed value resistor in series with the pot to limit maximum speed.

Boncuk
 

Mr RB

Well-Known Member
Yep, both the 100k resistor and the wire link (R11) next to it are both in series with the trimpot. If you reduce the value of the 100k cap I'm sure that would speed up the flash rate.

Also the greencap (C2 ?) is attached directly to the trimpot and it very likely it is the timing cap it looks about the right size. You could try reducing the value of the cap.
 
ok so reduce the 100k resistor and the green cap's values? and if i do this what values should i sumstitute, i know theres some sort of formula for this i think lol ne1?
 

Mr RB

Well-Known Member
Try replacing the 100k with a 33k, that should give you 3 times faster flash rate when the pot is turned right up.

Or just replace the cap with one that is 1/2 the value or 1/3 the value, which will give a better adjustment of speed with the pot.
 
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