Sensing Proximity

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Sensing proximity or distance can be done easily using a variety of different sensors. Most of them output an analog voltage depending on the sensed distance, so they are very easy to incorporate into any project.

Choosing a sensor

For sensing very short (under 1cm), the Optical Detector / Phototransistor can be used.

For measurements up to a foot, an infrared proximity sensor such as the Infrared Proximity Sensor - Sharp GP2Y0A21YK is a good bet.

Over a foot, and under a few meters, an ultrasonic range sensor may be the best bet.


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NOTE: All information contained within this article is pure opinion. Although this article is intended to help people, it may contain faulty or misleading information. This article is not to be considered professional opinion or advice, and is in no way a replacement for reading all safety/instructional documentation. Always remember to protect yourself when handling/using hazardous materials, as well as test new techniques before using them on projects/work intended to be handed in or used.

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