what resistor? electricals, helps me out

Dnyce · 03-22-2011, 05:00 AM

so, im doing some custom light work, and i got a led sequential integrated taillight. only problem is the signals dont light up sequentially unless i use two resistors (see pic). problem with that is
1) the light only came with two resistors, and i would need four, two per side. 2) they get hot, and so i hear, burn out frequently.

solution-get one resistor that has a rating equal to the two resistors.
or something else you guys come up with...

id guess since i need two 20w 5ohm resistors per side, one 2.5ohm resistor would do the trick, but does the wattage stay the same?

ive read that a no load flasher slows down the led blinkers, but where is it wired? inline with each side? or its a replacement for the flasher relay in the harness somewhere?

Dnyce · 03-22-2011, 08:39 PM

Anyone??

Trip · 03-22-2011, 09:15 PM

Do you have LEDs on the front as well?

3 ohm 50w is a pretty typical power resistor. Just get two of those.

What kind of bike is it? They sell LED flasher relays for pretty cheap now that have OEM connectors so you can skip wiring.

Such as this one: http://www.customled.com/products/fl...sher_relay.htm

Gas Man · 03-22-2011, 11:56 PM

Superbrightleds.com is my fav place to get LEDs

http://www.superbrightleds.com/cgi-b...html%23flasher

Dnyce · 03-23-2011, 11:37 AM

its a 2000 gsxr 750
leds on the front too, but with the last integrated tail i had, didnt need a resistor or anything. this one i do. ill check out the flasher

Particle Man · 03-23-2011, 04:48 PM

I'm gonna go with "Use a round one."

caveman · 03-23-2011, 06:11 PM

First off the drawing you have there shows the resistors in parallel. If they were in series I would say they are 10Ohm and you need a 10 ohm....

however, having forgot the formula for parallel resistors (somethin bout inversion...i'm sick and don't have all my facilities but if you were to get say one a 7 ohm you may have the issue licked.

just remember when you are in parallel like that they aren't actually that strong and that also may be causing your heat issue.

Get a circuitry for dummies book that will help.

Dnyce · 03-23-2011, 06:51 PM

The ohm part is right mathematically, 2.5
I just wasn't sure on the wattage. But I got it now, I just have to find them. Don't want to order online tho, want it now. If I can't find a led flasher, I'll use a 40-60w resistor as suggested by trip and some others I asked. I'll post pics when done, I think it looks cool

Gas Man · 03-23-2011, 10:54 PM

if you don't lube the konutter valve, you are screwed.

Kerry_129 · 03-24-2011, 04:14 PM

Tridon EL13 is a common electronic ('no-load') flasher available at pretty much any parts store. Way better solution (and cheaper, unless using the shitty ceramic radio shack ones) than installing 'load' resistors (heater elements - prone to failure & a kludge solution).

Just replace the OE flasher relay w/ it. Only caveat is needing to crimp generic spade-terminals on the wiring harness after identifying ground, + in & + out (+ in/out may not matter, don't recall).

03-22-2011, 11:56 PM	#4
Gas Man Trip's Assistant Join Date: Feb 2008 Location: Imported from Detroit Moto: 2009 HD Street Classic Posts: 12,149	Superbrightleds.com is my fav place to get LEDs http://www.superbrightleds.com/cgi-b...html%23flasher __________________ -Chris "Why pay somebody else to fuck up your bike?" Run Amsoil Product

03-23-2011, 11:37 AM	#5
Dnyce flyin high Join Date: Mar 2008 Location: cali Moto: 10speed huffy w/cards in the spokes Posts: 2,318	its a 2000 gsxr 750 leds on the front too, but with the last integrated tail i had, didnt need a resistor or anything. this one i do. ill check out the flasher __________________ "Racing Is Life, Everything Before and After is Just Waiting" Steve McQueen

03-23-2011, 04:48 PM	#6
Particle Man Custom User Title Join Date: Nov 2008 Location: Central NY Moto: 2003 SV650S Posts: 14,959	I'm gonna go with "Use a round one." __________________ I'm not "fat." I'm "Enlarged to show texture." Handle every stressful situation like a DOG: If you can't eat it or hump it, pi$$ on it & walk away.

03-23-2011, 06:11 PM	#7
caveman mmmm, Beeeer Join Date: Jun 2009 Location: South of the D Michigan Moto: 08 HD Ultra Posts: 582	First off the drawing you have there shows the resistors in parallel. If they were in series I would say they are 10Ohm and you need a 10 ohm.... however, having forgot the formula for parallel resistors (somethin bout inversion...i'm sick and don't have all my facilities but if you were to get say one a 7 ohm you may have the issue licked. just remember when you are in parallel like that they aren't actually that strong and that also may be causing your heat issue. Get a circuitry for dummies book that will help. __________________ Heres my 10¢, my 2¢ are free. Caveman

03-23-2011, 10:54 PM	#9
Gas Man Trip's Assistant Join Date: Feb 2008 Location: Imported from Detroit Moto: 2009 HD Street Classic Posts: 12,149	if you don't lube the konutter valve, you are screwed. __________________ -Chris "Why pay somebody else to fuck up your bike?" Run Amsoil Product

03-22-2011, 08:39 PM	#2
Dnyce flyin high Join Date: Mar 2008 Location: cali Moto: 10speed huffy w/cards in the spokes Posts: 2,318	Anyone??

03-23-2011, 06:51 PM	#8
Dnyce flyin high Join Date: Mar 2008 Location: cali Moto: 10speed huffy w/cards in the spokes Posts: 2,318	The ohm part is right mathematically, 2.5 I just wasn't sure on the wattage. But I got it now, I just have to find them. Don't want to order online tho, want it now. If I can't find a led flasher, I'll use a 40-60w resistor as suggested by trip and some others I asked. I'll post pics when done, I think it looks cool

03-24-2011, 04:14 PM	#10
Kerry_129 Semi-reformed Squid Join Date: Nov 2008 Posts: 531	Tridon EL13 is a common electronic ('no-load') flasher available at pretty much any parts store. Way better solution (and cheaper, unless using the shitty ceramic radio shack ones) than installing 'load' resistors (heater elements - prone to failure & a kludge solution). Just replace the OE flasher relay w/ it. Only caveat is needing to crimp generic spade-terminals on the wiring harness after identifying ground, + in & + out (+ in/out may not matter, don't recall). Last edited by Kerry_129; 03-24-2011 at 04:16 PM..