Arduino DUE + SRF02 ultrasonic

Ultrasonic Range Sensor

Photo

I2C protocol3.3 volts5 volts

Sensors are an important component of building a robot. Knowing the distance to an obstacle in front of the robot is extremely useful. For example to avoid a collision. An electronic compass and GPS is not sufficient to avoid a collision. I have thus experimented with several distance proximity sensors.

The Arduino DUE has pins 20 and pin 21 for the i2C SDA and SLC connectors.

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Sketch