Technical requirements 

In the practical part of this chapter, you’ll use the Circuit Playground and Gemma M0 boards and create flex sensors. You’ll also connect a flex sensor and servo motor to the same circuit. To follow along, you’ll need the following items for the circuits. You can choose or swap items out from the following list:

• A Circuit Playground/Gemma M0 board and a micro USB cable
• Various flex sensors and a stretch sensor
• Conductive fabrics/textiles
• Velostat resistive plastic
• A 10KΩ resistor
• A servo motor
• The Arduino IDE: https://www.arduino.cc/en/software