Kart/sensor board

End of turn switch

The end of turn switch is located in the I/O board's middle row. It is the 4-pin connector closest to the 5-pin connector. The switch cable is to be connected as:

cable	pin
green	5 V power supply
yellow	input

The input has a pull-down resistor. Closing the switch brings a logic '1'.

Hall sensors

The sensor connectors are located in the I/O board's middle row. The sensor cable is to be connected as:

cable	pin
red	3.3 V or 5 V power supply
brown	sensor signal
black	ground

Ultrasound ranger

The sensor connectors are located in the I/O board's middle row. It is the single 5-pin connector. The sensor cable is to be connected as:

cable	pin
red	5 V power supply
yellow	measurement start (trig)
green	echo signal (distance)
black	ground

Proximity sensors

The sensor connectors are located in the I/O board's side row.

The sensor cable is to be connected as:

cable	pin
orange	3.3 V power supply
yellow	SDA
green	SCL
blue	ground

LED outputs

The board has 4 LED outputs which can also be used for other purposes, such as buzzers.

The outputs have a common power supply, 2 resistor mount holes and a 2-pin LED connector located on the I/O board's bottom row.

The power supply is connected directly to the 12 V battery packs. The resistor is connected between the power supply and the LED. The LED is connected between the resistor and the ground.