You will require the following for this chapter:
- The Raspberry Pi Robot and the code from the previous chapters
 - Two HC-SR04 ultrasonic sensors
 - Male to female jumpers
 - Breadboard pre-cut jumper wires kit
 - Two additional bidirectional level shifters (I2C safe), soldered, as shown in Chapter 9, Programming RGB Strips in Python.
 - Two brackets for the HC-SR04 sensor
 - A crosshead screwdriver
 - Miniature spanners or small pliers
 - The code for this chapter will be available on GitHub
 
Check out the following video to see the Code in Action: