HCSR501 HC-SR501 PIR Sensor

HC-SR501 PIR Sensor Price in Pakistan

The HC-SR501 is a passive infrared motion-detection module for Arduino-compatible alarms, automatic lighting and occupancy experiments. It responds to changes in infrared energy caused by a moving person or other warm object across its sensing zones.

Key features

• Listed supply range: approximately 4.5V to 20V DC
• Digital output with an approximately 3.3V HIGH level
• Adjustable sensitivity
• Adjustable output-delay control
• Repeatable and non-repeatable trigger modes selected by jumper
• Listed sensing angle: under approximately 120 degrees
• Listed detection distance: up to approximately 7m under suitable conditions

Setup guidance

Allow the module to stabilise after power-up before adjusting it. Begin with moderate sensitivity and a short delay, then test movement across the intended area. PIR performance changes with mounting height, lens orientation, ambient temperature, airflow and the direction and speed of movement.

Trigger modes

In repeatable mode, continued motion can extend the active output period. In non-repeatable mode, the output completes the selected delay before it can respond normally again. Confirm the jumper labels on the supplied board revision.

For controller testing, connect the output to an Arduino UNO R3 after confirming supply and logic levels. Browse more distance and proximity sensors from Robonation Pakistan.

For reading the output, review the Arduino digitalRead reference.