rheostat for led's in a car - Electronic Circuits Projects Diagrams Free

browser90 · 24th November 2007, 07:38 PM

I'm trying to find a rheostat that can dim the LED's in my car. The stock rheostat in the car doesn't work with LED's and they are a little too bright for comfort. What is there to buy that would dim 12volt LED's?

Hero999 · 24th November 2007, 09:52 PM

A PWM controller - a 12V motor speed control is perfect.

browser90 · 25th November 2007, 12:57 AM

Thanks! I'll look into that, or if you have a direct link to one please post it.

Boncuk · 25th November 2007, 12:29 PM

Here is a simple circuit controlling the LEDs PWM.

The frequency is 2.8KHz. If you want e.g. 280Hz just replace C1 by 100nF (now 10nF)

Note: 100% output will be at the lower end of RV1. The circuit controls from zero to constantly 100%. Adjust the current limiting resistor (R3) according to the requirements (no of LEDs in series for instance).

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24th November 2007, 07:38 PM	(permalink)
browser90	rheostat for led's in a car I'm trying to find a rheostat that can dim the LED's in my car. The stock rheostat in the car doesn't work with LED's and they are a little too bright for comfort. What is there to buy that would dim 12volt LED's?

24th November 2007, 09:52 PM	(permalink)
Hero999	A PWM controller - a 12V motor speed control is perfect. __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez

25th November 2007, 12:57 AM	(permalink)
browser90	Thanks! I'll look into that, or if you have a direct link to one please post it.

25th November 2007, 12:29 PM	(permalink)
Boncuk	rheostat for led's in a car Here is a simple circuit controlling the LEDs PWM. The frequency is 2.8KHz. If you want e.g. 280Hz just replace C1 by 100nF (now 10nF) Note: 100% output will be at the lower end of RV1. The circuit controls from zero to constantly 100%. Adjust the current limiting resistor (R3) according to the requirements (no of LEDs in series for instance).