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When it encounters an obstacle in the detection direction (reflecting surface), the infrared rays are reflected by the receiving tube.
After the comparator circuit is processed, the green light is on, and the digital signal output signal output interface (low 0 V signal), the detection range is adjusted by the potentiometer knob, the effective range is 2~30 cm, and the working voltage is 3.3 V-5V.
It has the characteristics of small interference, easy assembly and convenient use. It can be widely used in obstacle avoidance robots, avoiding cars, counting pipes and black and white line tracking.
1. When there is no obstacle signal on the front of the module, the output OUT port is continuously high (5V). When the module detects an obstacle in front of the signal, the green indicator light and the OUT port on the optical circuit board will continue to have a low output (0v) signal. The module detects a distance of 2~30cm, the detection angle is 35Â°, and the sensing distance can pass through the potentiometer. Clockwise potentiometer adjustment to increase the sensing distance; clockwise potentiometer to reduce the detection distance.
2. Active infrared reflection detection sensor, so that the target of reflectivity and shape is the key to distance detection. The black detection range is the smallest, the largest white; the small area away from the object, the large area distance.
3. OUTPUT port output sensor module can be directly connected to IO port microcontroller, or can directly drive 5V relay; connection: VCC-VCC; GND ground; OUT-IO
4, the comparator uses LM393, stable.
5, can use 3.3V-5V DC power module. When the device is powered on, the power indicator is red; Instructions for use: External 3.3 V-5 1.VDC V voltage (can be directly connected to a 5 V microcontroller or a 3.3 V single chip) 2. GND 3 External GND. Small digital output interface board (0 and 1)