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**Arabian_Knight** · 05-02-2006, 01:47 PM

lol piney all im asking you is which is the positive terminal on the bulb housing or if there is a way to see it (not on the diode), you said tria and error. It is true that th threshold voltage of a diode is 0.7 volts but you should never operate at that voltage. The proper function of the LED is at 3V / 400 Ohms according to specs. Dropping a 1.2K resistor is series will get me a total impedence of 1.6K and a voltage of 3V across it. current will be below 20 mA as 12V/1.6KOhms= 7.5 mA which is less that my fuse max. Im still EE, and this is not a matter of material, im asking about the cluster bulb housing, not the diode.

blue orange brown
6 3 x 10

so 630 Ohms which is basically half what I used... different LED different biasing.

05-02-2006, 01:47 PM	#5 (permalink)
Arabian_Knight AK47 Location: Richmond Hill Posts: 3,800 Join Date: May 2005 Last On: 02-09-2008 02:14 AM Vehicle: G35 Coupe 6MT 2nd Vehicle: Swapped 5th gen	lol piney all im asking you is which is the positive terminal on the bulb housing or if there is a way to see it (not on the diode), you said tria and error. It is true that th threshold voltage of a diode is 0.7 volts but you should never operate at that voltage. The proper function of the LED is at 3V / 400 Ohms according to specs. Dropping a 1.2K resistor is series will get me a total impedence of 1.6K and a voltage of 3V across it. current will be below 20 mA as 12V/1.6KOhms= 7.5 mA which is less that my fuse max. Im still EE, and this is not a matter of material, im asking about the cluster bulb housing, not the diode. blue orange brown 6 3 x 10 so 630 Ohms which is basically half what I used... different LED different biasing. __________________ Last edited by Arabian_Knight : 05-02-2006 at 01:52 PM.