Eightbit

I did the math, you need a 280 ohm resistor to make it work in line. However it needs to dissipate more wattage than most single resistors will. I chained 3 100 ohm 1/4 watt dissipation resistors in series in the 12V supply line. All test fine on the 12V supply from the PSU, haven't used the header yet as I'm still building but I believe it should be fine.