yeah thanx for the repply i was wondering about that +12v and +5v=7v i didnt know wich to use as negative/ground. and yes i have ATX power suply i will buy some resistors tomorrow and give it a try, my biggest concern here was not to fry the heli 4-1 so i will try that and monitor the motor temperature wich i know mine with out motor sink is 130 F temperature after a discharging the 2c li-pos. thanx