resistor yes or not?

[Jussek]

heya chaps

A quick one.

I'm rebuilding the Tiki tiger, it's armed with an Elmod Rev E brain... it crossed my mind to make a DIY convoy light, but I'm not sure if it's necessary to use a resistor for the LEDs, or the Elmod is already ready to provide the relevant voltage

The elmod manual reads:

• One or two red LEDs for combined rear and brake lights. The rear light is controlled together with the front light. The brake light is active independently of the state of the main/rear light.

• All light outputs are short circuit protected and current limited.

but as I'm very electrichandicapped, I am not sure if the last sentence is the reply I'm looking for...

I would appreciate if anyone can help this old chap in this doubt

[Pavel]

To avoid being gnawed by the worm of doubt, measure the voltage on the contact where the standard LED was inserted....
if the voltage does not exceed 3 Volts, then you can connect the LED without a damping resistor.
If 5 Volts, then a voltage damper is required, which you can calculate.
It is enough to type in the search engine, "Calculator for connecting LEDs"


https://ledcalculator.net/#p=7.4&v=1.8&c=20&n=1&o=w

[Jussek]

Thanks Pavel