Ultrasonic Distance Sensor HC-SR04 5V Version 21938 Once the basic shapes have

Once the basic shapes have been mastered

and anyone who needs to create visual aids or diagrams

3 flash card sets

variable speed and low weight ensures perfect control

Ideal for small water features or plant watering systems

Ultrasonic Distance Sensor HC-SR04 5V Version 21938 Once the basic shapes haveAdd obstacle detection to your robotics, electronics, or Arduino project. This module has been specially selected to work on the voltage range typically found with the Arduino range of products. This economical sensor provides 2cm to 400cm of non contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC SR04 module includes an ultrasonic transmitter, a receiver and a control circuit. There are only four pins that you