BLDC/3 phase motor driver with Arduino

[sirbow2]

hey, ive been trying this too, but i cant get it to work. look here please: arduino forum /topic,84313.0.html

[arnokleine623]

StijntjheYT so if you want to drive just one way you can use 3

[StijntjheYT]

@arnokleine623 No, a brushless dc motor has 3 coils/phases/wires. Do some googlin' ;-) I had to figure it out myself too.

[arnokleine623]

why you can't use 3 transistors

[StijntjheYT]

@arnokleine623 Because you need to independently control which direction the current flows per coil/phase.

[fredlllll]

is there a shematic of the transistor circuit? i want to drive a 3 phase motor with my arduino too, but i grilled some transistors last time =(

[StijntjheYT]

@fredlllll It are just 6 NPN's, made three half-h-bridges from it, one for each phase.

[fredlllll]

@StijntjheYT what? XD sorry but that doesnt says anything to me =/ i got an arduino, which provides 3 phases, so 3 pins switching from low to high. when hanging the motor directly to the arduino it turns very slow.