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Infrared proximity sensor made by Sharp. Part # GP2Y0A21YK has an analog output that varies from 3.1V at 10cm to 0.4V at 80cm.
The sensor has a Japanese Solderless Terminal (JST) Connector. We recommend purchasing the related pigtail below or soldering wires directly to the back of the module.
Datasheet:
https://acroname.com/sites/default/files/assets/sharp_gp2y0a02yk0f_datasheet.pdf
GP2Y0A21YK - Infrared Proximity Sensor - Sharp
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