Arduino Circuit with Color and Ultrasonic Sensor July 22, 2014 2500 × 1875 Python with Arduino LESSON 4: Expanding your Virtual World This is our circuit with the HC-SR04 ultrasonic sensor and the TCS230 Color Sensor This circuit combines the arduino microcontroller, the HC-SR04 ultrasonic sensor and the TCS230 color sensor to create a really cool virtual world.