At the first glance, the encoder motors look like normal electric motors designed for a voltage of 9 V and a power intake of max. 0.5 amperes. However, the encoder motors can do much more: In additional to a connection for the motor’s power supply, they also include a socket for a 3 pin connection cable that can be used with the so-called encoder to assess the rotary motion of the motor. The encoders on fischertechnik encoder motors generate three impulses per rotation of the motor shaft. And because these encoder motors also have a gearbox with a transmission ratio of 25:1 (“25 to one”), one rotation of the shaft from the gearbox is equivalent to 75 impulses of the encoder.
