Hi,
I would like to mod my cree-module for my ultrafire wf-500 with a p7. Since I haven't found a cheap driver for it I thought of using a resistor and direct drive.
I'd like to use two 18650s but, unfortunately, my knowledge of electronics is rather small.
Is there a formula to calculate the right resistor value (do I say so?)? And do I need a special one because of the highter wattage?
Regards,
Tom
I would like to mod my cree-module for my ultrafire wf-500 with a p7. Since I haven't found a cheap driver for it I thought of using a resistor and direct drive.
I'd like to use two 18650s but, unfortunately, my knowledge of electronics is rather small.
Is there a formula to calculate the right resistor value (do I say so?)? And do I need a special one because of the highter wattage?
Regards,
Tom