A built-in potentiometer allows users to fine-tune the sensing distance. Turning it clockwise typically increases the range, while counter-clockwise decreases it. Performance Considerations
The IR LED emits a 38kHz–56kHz modulated signal (though many clones use continuous IR). The phototransistor detects reflected IR from an obstacle. The LM393 comparator compares the phototransistor’s voltage to a reference voltage set by a (blue box on the board). When reflected IR exceeds the threshold, the output goes LOW. fc 51 ir sensor datasheet hot
Don't forget to calibrate the onboard potentiometer. If the LED isn't turning on when an object is close, use a small screwdriver to adjust the sensitivity until it triggers at your desired distance. A built-in potentiometer allows users to fine-tune the
Use the onboard potentiometer to adjust range. Turn clockwise to decrease sensitivity (avoid false triggers from walls or floors). The phototransistor detects reflected IR from an obstacle
