indicator flashing speed

[captain_chaos]

I've changed my front indicators over to LEDs and they work, but flash at a faster pace. Is there a requirement for the rate they flash at? If so how do I slow them down? Resistors or new relay?

[MattF]

Believe you can get a specific relay for them, or just bung some resistors on.

[mud skipper]

I've changed my front indicators over to LEDs and they work, but flash at a faster pace. Is there a requirement for the rate they flash at? If so how do I slow them down? Resistors or new relay?

i believe its supposed to be 40 flashes a minute, but im usually wrong

[captain_chaos]

Believe you can get a specific relay for them, or just bung some resistors on.

any ideas as to what size resistors?

[MattF]

any ideas as to what size resistors?

Snatch or Andy should know the specifics. They sorted Snatch's out last year.

[Apache]

*all figures are assumptions, but this will hopefully help you work out what you need*

Whats an indicator bulb wattage? 12W? That means 1A current at 12v - slightly less with engine running (14.4v)

Therefore assuming your LEDs draw 100ma, you need to draw around 900ma through resistors in order to get the correct flash rate. For 12V this is around 13 ohms. Buy a value close to this. You need to sink similar wattage so buy aluminium heatsinked ones of around 20W to give you some headroom and bold them to the chassis somewhere.

[MattF]

*all figures are assumptions, but this will hopefully help you work out what you need*

Whats an indicator bulb wattage? 12W? That means 1A current at 12v - slightly less with engine running (14.4v)

Therefore assuming your LEDs draw 100ma, you need to draw around 900ma through resistors in order to get the correct flash rate. For 12V this is around 13 ohms. Buy a value close to this. You need to sink similar wattage so buy aluminium heatsinked ones of around 20W to give you some headroom and bold them to the chassis somewhere.

Did you get those to work correctly on Snatch's eventually then, or was an alteration required?

[captain_chaos]

cheers guys, will go shopping for resistors now

[That Ruddy Squirrel]

Jason,

I use these



Trev

[captain_chaos]

Jason,

I use these



Trev

cheers trev

[Apache]

Yup, thats the fellas.

Dunno if thats cheap or not. It's years since I last bought power resistors... If you've got a Maplin nearby you could have a look...

[captain_chaos]

Yup, thats the fellas.

Dunno if thats cheap or not. It's years since I last bought power resistors... If you've got a Maplin nearby you could have a look...

tried maplins, no luck so have bought the e-bay ones

[muller1]

Indicator Flasher speed.

By law under construction and use rules indicators are required to flash between 60 and 120 flashes per minute.


Mike

[Apache]

Yeam, Maplin are a bit cack for components these days.