The bend sensor is composed of tiny patches of carbon that change resistance when bent. Its maximum resistance is between 30k and 40k ohms, proportional to how far it's bent. Its nominal resistance is 10k ohms. Resistor and wire assembled, ready for immediate connection to the Make Controller.

The sensor has three wires, which should be connected to the following locations:

• 3.3V (red) to a VIn on the Controller set to 3.3V.
• Ground (black) to a GND connector on the Controller.
• Signal (yellow) to an analog input, 0-7.