FAO Cashy

General Bike chat
User avatar
Max
Posts: 878
Joined: Fri Mar 12, 2004 10:12 am
Location: Pembrokeshire

FAO Cashy

Post by Max »

Are these the indicators you is using ???

http://www.motrax.co.uk/Index_pages/acc ... arrows.htm

I assume short ones for the back, did you change the front ones as well ? if so did you have to use the long ones to reach out from the plastics ?? Also did you require resisters ? Sorry about lots of questions its just I is really stoopid.

Max

I tried sending a pm but I seem unable to send them properly, cause I am crap.
User avatar
cashy
Posts: 50
Joined: Sat Jun 19, 2004 8:29 pm
Location: cheshire

indicators

Post by cashy »

Morning Max, or is it afternoon ! :oops:

Yep they are the babes, look great still trying to sort out photos of them on the bike they are fitted to the rear, short stem carbon, didnt fit the resistor thing that says it comes with cus it doesnt so they just flash a bit quicker, on other posts I have seen this might make it a MOT fail, but that goes with the exhausts, number plate etc anyway.

Cheers

Daz.
User avatar
Max
Posts: 878
Joined: Fri Mar 12, 2004 10:12 am
Location: Pembrokeshire

Post by Max »

They look tidy, so I shall be hitting the card then.

Max
User avatar
cashy
Posts: 50
Joined: Sat Jun 19, 2004 8:29 pm
Location: cheshire

indicators

Post by cashy »

max,
I am crap with computers cant understand how to get photos onto a reply etc, send me your email address and I will send photos that way. :oops:
User avatar
cashy
Posts: 50
Joined: Sat Jun 19, 2004 8:29 pm
Location: cheshire

indicators

Post by cashy »

I am stupid, just checked PM file and you have sent email already, sending photos now!
User avatar
cashy
Posts: 50
Joined: Sat Jun 19, 2004 8:29 pm
Location: cheshire

indicators

Post by cashy »

back to square one email failed delivery just returned on my computer, email, tinernet it'll never catch on!
MDJ
Posts: 227
Joined: Thu Apr 22, 2004 9:56 am
Location: Worcester park, surrey, London

Post by MDJ »

I have flat led ones at the front, my old bulb indicators are on the end of their wire, stuffed inside the fairing which lights up the rad when indicating 8) apparently the previous owner did this to even up the charges or summit so they'd flash slow?
Anyone know if I fit led to the rear would the whole shebang still work? :?
I got knocked down, but i'll get up again and you'll never ever keep me down!
User avatar
Max
Posts: 878
Joined: Fri Mar 12, 2004 10:12 am
Location: Pembrokeshire

Post by Max »

A resistor should do away with the need for extra bulbs behind the rads, When I get round to purchasing the indictors I shall try various resistors and see what size they should be.

Max
User avatar
Stormin Ben
Posts: 1234
Joined: Sun Dec 01, 2002 12:23 am
Location: Birmingham

Post by Stormin Ben »

Max wrote:A resistor should do away with the need for extra bulbs behind the rads, When I get round to purchasing the indictors I shall try various resistors and see what size they should be.

Max
From what I remember of my physics A-level
Volts = Amps x Resistance
Watts= Volts x Amps

So Resistance = Volts squared / Watts
Volts = 12v
Watt = 21w (indicator bulbs)

Resistor = 144/21 = 6.85 Ohms


But thats if they're wired in line with the new indicators
I remember something about wiring them in parallel (across the terminals) to equalise the resistance but my brains turned to mush on that bit :(


Ben
User avatar
Pete.L
Forum Health And Safety Officer
Posts: 7305
Joined: Fri Sep 26, 2003 5:09 pm
Location: Bristol

Post by Pete.L »

Keep going Lads. Nearly there :lol:
Don't forget to work out the wattage of the resistor. Too skinny a one and it'll burn up

Pete.l
MDJ
Posts: 227
Joined: Thu Apr 22, 2004 9:56 am
Location: Worcester park, surrey, London

Post by MDJ »

Wring in parralel halves resistance...
I got knocked down, but i'll get up again and you'll never ever keep me down!
User avatar
Max
Posts: 878
Joined: Fri Mar 12, 2004 10:12 am
Location: Pembrokeshire

Post by Max »

From what I remember of my physics A-level
Volts = Amps x Resistance
Watts= Volts x Amps

So Resistance = Volts squared / Watts
Volts = 12v
Watt = 21w (indicator bulbs)
From what I can remember all the above is based on ohms law, but also I am pretty sure bulbs aren't ohmic conducters ????????

If the LEDs are as normal red ones then the resistor would go in series I would of thought to increase the load.
User avatar
Max
Posts: 878
Joined: Fri Mar 12, 2004 10:12 am
Location: Pembrokeshire

Post by Max »

Just in case anyone is still interested I had this reply today from Motrax
HI there,

The resistors you would need would be 25 watt and 6 ohms.

You would need 1 on each indicator and yes the y would be in parallel.

I have recently received 2 samples of 3.9 ohms meaning you would only need on per side, but have not tested these as yet.

I have a strong suspicion that these will do the job.

Regards
Anthony
So Ben was right at 6 ohms and in parallel

Max
User avatar
cashy
Posts: 50
Joined: Sat Jun 19, 2004 8:29 pm
Location: cheshire

flashy things!

Post by cashy »

All this is far too technical for a mear idiot, so when anyone has tried and tested these for the front and rear LED's please let me know, and I'll get my biker mate to fit them, its great what you can get someone to do for a bacon buttie on a saturday morning!!!! :wink:
User avatar
Max
Posts: 878
Joined: Fri Mar 12, 2004 10:12 am
Location: Pembrokeshire

Post by Max »

If anyone one still cares, I have bought LED's for the front and back. I got a bag load of resistors from RS (http://rswww.com).

The std indicators blink somewhere between 70 and 80 flashed per min on my bike, so thats what I aimed for.

For a single LED indicator as tony from motrax said a 6.8 ohm resistor accross the terminals (in paralell) returns the flash rate as above. He was also right that for LED's front and back a single 3.9 ohm resistor does the job.

I used a 17 W resistor at 6.8 ohms and a 50W resistor at 3.9 ohms. the 17 is possibly small and a 25 W would be better. Beware though if the indictors are left on for more than a minute or 2 the resistor gets quite warm. I plan to use the 3.9 on each side and mount it to the frame under the seat. These resistors also are about 2'' long.

hopefully this is the page

http://rswww.com/cgi-bin/bv/browse/Modu ... kNo=160837
Post Reply