I don't know what the fourth one is for, i think the fifth one is voltage, but i don't know what voltage it is.
my mb only has 12v could i solder a resistor to voltage wire to drop it from 12v to 5v?
Alien head led from my old alienware x51 r2It's likely just an RGB LED.
V+ is the Common Anode connection. (Likely 5VDC....possibly 3.3VDC)
B is Blue Cathode connection (through a current limiting resistor)
G is Green Cathode connection (through a current limiting resistor)
R is Red Cathode connection (through a current limiting resistor)
DET appears to be a "Detect" input...."RX" would refer to a receiver signal of some type.
What is this a part of?
Now that I think about what you've said, one could do the PWM as low-side switching on the R, G, and B cathode leads, with the DET wire serving as detection for the presence of the module on the header, or as PWM feedback for the driver.
Still, I'd like to know the value of at least the resistor in the red cathode circuit, as that would give a good idea of the design voltage.
my mb only has 12v could i solder a resistor to voltage wire to drop it from 12v to 5v?Test it with 12VDC, and if it survives....LOL....you could use it on the LED_C1 header. You'll just have to crimp some "Dupont" terminals on the wire ends, and load up a 4-position connector block in the proper order.
my mb only has 12v could i solder a resistor to voltage wire to drop it from 12v to 5v?
Would these work ?You'd actually need to add current limiting resistors to each of the R, G, and B wires, instead of a single resistor to the V+ wire; and the resistors that are already there are probably low-balled for PWM, so we'll just ignore them for the moment.
Without putting the math in here, for red and green, use a 120Ω resistor on each wire. For blue, use a 110Ω in that one. That should get you in the ball park for directly driving them.
For any color you want to increase the brightness of, reduce the value of the resistor in that wire. If you want to decrease the brightness of a particular color, increase the value of the resistor in that wire.
The wiring should look like this?
shouldnt i be able to change it with my mother board's rgb software (RGB Fusion) since its on a led header ?Yup.....That would be my first attempt at hooking it up.
After that, take note of the brightness of each element (it should light-up as nearly white with all leads connected), and adjust the resistances to meet your tastes.
An alternate approach that I didn't think of, before, would be to use 3 - 150Ω to 200Ω trim pots--one in each lead--to adjust the color mix on the fly.
If you haven't already ordered the resistors, then that might be the way to go.
I forget to mention things like that, because I tend to do it without thinking about it; but, yeah. That would be best....heat shrink tubing...
Good deal. It looks like you're ready for your abduction, now.It works ty