The HC-SR501 is a low cost sensor which can be used to detect the presence. This sensor can be used with any platforms like Arduino, Raspberry, PIC, ARM, ESP8266, ESP32, Arduino. You can adjust the sensing distance of the HC-SR501 by rotating the sensitivity potentiometer CW or CCW Rotating the potentiometer clockwise increases the sensing distance to a maximum. Rotating it counter clockwise decreases the sensing distance to a minimum.This potentiometer can be used to adjust the time that the output stays HIGH for after motion is detected. At a minimum, the delay is 3 seconds and at a maximum, it is 300 seconds or 5 minutes. Turn the potentiometer clockwise to increase the delay and counter clockwise to decrease the delay.
| Dimension | 3.2cm x 2.4cm x 1.8cm |
| Working voltage | 4.5V - 20V |
| Current drain | <60uA |
| Voltage Output: High/Low level signal | 3.3V TTL Output |
| Detection distance | 3--7M(can be adjusted) |
| Detection range | <140° |
| Delay time | 5-200S(can be adjusted, default 5s +-3%) |
| Blockade time | 2.5 S (default) |
| Trigger | L: Non-repeatable trigger H: Repeat Trigger (default) |
| Work temperature | -20-+80°C |
| Trigger Method | L unrepeatable trigger / H repeatable trigger |
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