Hey , i am facing a similar problem , i have given a 5volts (stepped down from 12 volts ) to the board , the 9g servo runs properly but i have a 60g avionic servo , if i connect it in the same way and try ,the servo starts once and then stops , also can someone explain the improper rotation with these servos , i am really out of ideas and a bit frustrated .( i used the library , sweep sketch )