Two-way selector module with servo.

Two-way selector modules with servo.

The dimensions fit Fischertechnik. The servo setup is made in such a way that it cannot get stuck with a powerup. Sometimes this small servo goes out of position when applying the power supply voltage. There is extra space here. The flipper arm can easily be placed in 3 positions. This way you can select left, right or stop. The previously made optical detector also fits directly on this module. This way you can count the number of marbles.
The control is done via I2C. In my I2C with FPGA I have 32 servo outputs. The TXT-Controller controls the position via the I2C connection.