Engine control switch for a battery-operated electric tool

The arrangement (1) has a semiconductor switch (9) e.g. n-channel MOSFET, interconnected with another semiconductor switch (11) in a form of a half bridge (21), and a toggle switch (15) forming another half bridge (23). A control electronics circuit (7) e.g. microcontroller, is arranged to control the switches. The half bridges are interconnected such that an electric motor (13) is operated in a bridge section (25). The electronics circuit controls the semiconductor switches by pulse width modulation. The electronics circuit selectively controls the motor in a rotary direction. An independent claim is also included for a method for controlling an electric motor with a circuit arrangement.