Calibration setup for HC-SR04- Sharp GP2Y0A02YK0F - VL53L0X

# A calibration setup
Allows simultaneous testing and calibration of proximity sensors [HC-SR04](http://bit.ly/2JJiXH0), [Sharp GP2Y0A02YK0F](http://bit.ly/2t33HKz) and [VL53L0X](http://bit.ly/2lgDpAw)

For more details on the sensors, these articles might interest you
- [Test and calibration of the Sharp IR GP2Y0A02YK0F](https://diyprojects.io/proximity-sensor-a02yk0-test-calibration-sharp-gp2y0a02yk0f-asian-clone/)
- [Comparative study of the 3 sensors. Example of a project to measure th