The HC-SR04 ultrasonic ranging module is a fantastic addition to any robot project. Its a very simple and cheap way to track a robots progress (assuming we have fixed reference points) over a reported range of 2-400cm with accuracies of 3mm possible. It's also a great way to add object avoidance to ...By: jazzycamel
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from Instructables: exploring - technology - robots http://ift.tt/1EeRVx9
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