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Grayscale Sensor Photosensitive Resistor Light Sensor Analog Electronic Board Line Finder Tracking Module Compatible for Arduino Uno R3 Robot Smart Car DIY Kit - Relkin, GR4 Relkin GR4 Grayscale sensor is an analog sensor. It can be compatable with the arduino sensor expansion board v5.0 And sense the different colors of the ground or the desktop and generate corresponding signals It can realize interactive works related to color, and can also be used as grayscale recognition of the field sensor or uno smart robot car The power supply needs to be the same as the controller, usually 3.3V or 5V Package: 4pcs Grayscale sensor

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