LED cir.

Thread Starter

conntaxman

Joined Oct 30, 2009
12
would anyone have or could make a drawing to connect 4 leds in pararell using a LM338 regulator.It can handle up to 5 amp.
The forward voltage is 3.5 current is 700ma and supply voltage is 12vdc.wattage for each led is 3 watts.
Im just looking for a small cir. for this.
tks
John
 

Audioguru

Joined Dec 20, 2007
11,248
The forward voltage of an LED is a range of voltages. It might be 3.2V, 3.5V or 3.8V.

You must use a resistor or a circuit to limit the current. A voltage regulator can be used to power incandescent light bulbs, not LEDs but it can be made into a current regulator.

Don't over-heat the LEDs by running them at their max allowed current unless you separate them and cool them properly.
 
Top