Technical requirements
To complete the hands-on experiments in this chapter, you will require the following:
- The Raspberry Pi robot and the code from the previous chapters.
 - Two HC-SR04P, RCWL-1601, or Adafruit 4007 ultrasonic sensors. They must have a 3.3 V output.
 - A breadboard.
 - 22 AWG single-core wire or a pre-cut breadboard jumper wire kit.
 - A breadboard-friendly single pole, double toggle (SPDT) slide switch.
 - Male-to-female jumpers, preferably of the joined-up jumper jerky type.
 - Two brackets for the sensor.
 - A crosshead screwdriver.
 - Miniature spanners or small pliers.
 
The code for this chapter is available on GitHub at https://github.com/PacktPublishing/Learn-Robotics-Programming-Second-Edition/tree/master/chapter8.
Check out the following video to see the Code in Action: https://bit.ly/2KfCkZM