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Ecu Led Voltage

monzo
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monzo Rookie

monzo

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G'day guys.

The LED has blown in my ECU, have another ECU to replace the LED with but wondering if anyone knows the voltage that goes to the LED as I have a 12V led and was going to piggy back off the existing setup to then remote mount it.

Also, anyone in Brisbane good with a soldering iron to change out the LED's for me, beer economy.

Cheers.

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zoomzoom Mentor

zoomzoom

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Why is it a special LED? Is it not just a regular 5mm moulded acrylic LED? If its red they have a forward voltage around 1.8V. Billions of them in the world, no need to hack up existing parts.

If I understand right, you want to use an actual manufactured LED bulb? The only LEDs with forward voltages of 12v are big 10w + LED chips used in floodlights.

If so, I doubt you would be able to power it from the circuit directly. If it only powered a small LED, thats around 10mA. Also without knowing what circuitry powers the LED (eg constant current driver) drawing too much current could destroy an irreplaceable chip.

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monzo Rookie

monzo

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Why is it a special LED? Is it not just a regular 5mm moulded acrylic LED? If its red they have a forward voltage around 1.8V. Billions of them in the world, no need to hack up existing parts.

If I understand right, you want to use an actual manufactured LED bulb? The only LEDs with forward voltages of 12v are big 10w + LED chips used in floodlights.

If so, I doubt you would be able to power it from the circuit directly. If it only powered a small LED, thats around 10mA. Also without knowing what circuitry powers the LED (eg constant current driver) drawing too much current could destroy an irreplaceable chip.

Thanks for the reply. I've got little 12V led's that come from jaycar.. must have circuitry in it to make it 12V.

http://www.jaycar.com.au/Active-Components/Optoelectronics/LED-Modules/12V-Mini-Chrome-Bezel---Red/p/SL2644

i'll scrap the idea of running a remote one off it then.

any chance you're in Brisbane?

Edited by monzo
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zoomzoom Mentor

zoomzoom

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Lol I am a bit far south. But you could learn a lot by measuring with a multimeter. You could try desoldering the current LED and probing the voltage for starters (but you would also need to check it while powering an LED too). It sounds like you don't have any electronic tools like a soldering iron, but its a worthwhile skill to invest in.

Also keep in mind: do you know for sure the LED is blown? The LED may be a red herring and some other part of the circuit is non functional.

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monzo Rookie

monzo

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Lol I am a bit far south. But you could learn a lot by measuring with a multimeter. You could try desoldering the current LED and probing the voltage for starters (but you would also need to check it while powering an LED too). It sounds like you don't have any electronic tools like a soldering iron, but its a worthwhile skill to invest in.

Also keep in mind: do you know for sure the LED is blown? The LED may be a red herring and some other part of the circuit is non functional.

Hope it's just the LED. The ECU does work fine in all aspects just no functioning LED. I'll test the voltage tomorrow before I head to Jaycar to make sure it's a blown LED and have the voltage required then as well. Was hoping someone might have the voltage it is to avoid this.

I can solder wires together but when it comes to desoldering/resoldering circuit boards i'd prefer to leave it to someone who has done heaps of them before as I don't want to wreck the ECU I have.

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