Welcome to our shop! The grayscale sensor is an analog sensor that can perceive different colors and generate corresponding signals when used with the sensor expansion board v5.0. It includes a white high brightness LED and a photoresistor for gray value testing based on the strength of light. With its 3 pin design (power positive VCC, power ground GND, and signal terminal OUT), it can be directly connected to the analog interface of the controller. This grayscale sensor has multiple uses, including color-related interactive works, line following sensor, and football robot field gray recognition. To use the sensor, simply connect it to the controller according to the program and observe the value output by the serial port under different grayscale values. Item Type: Grayscale Sensor Working Voltage: 3.3V or 5V Working Current: <20mA Operating Temperature Range: -10℃-70℃ Detection Resolution: 10% Interface Type: Analog signal output Board Size: Approx. 24 x 21mm / 0.9 x 0.8in Interface Definition: OUT: Signal Output VCC: Power (VCC) GND: Ground (GND) 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.