What is a HC SR501?
HC-SR501 PIR Sensor detects motion by measuring changes in the infrared (heat) levels emitted by surrounding objects. When motion is detected the PIR sensor outputs a high signal on its output pin. HC-SR501 PIR Sensor has an adjustable delay before firing and adjustable sensitivity.
How do I calibrate my HC SR501?
Adjusting the HC-SR501 You can adjust the sensing distance by rotating the sensitivity potentiometer CW or CCW (see picture above). Rotating the potentiometer clockwise increases the sensing distance to a maximum of 7 meters. Rotating it counterclockwise decreases the sensing distance to a minimum of 3 meters.
What is the output voltage of PIR sensor?
Specifications
| Item | Value |
|---|---|
| Input Voltage | DC 4.5V ~ 20V |
| Static Current | <50uA |
| Output Signal | 0V / 3V (Output high when motion detected) |
| Sensing Range | 7 meters (120 degree cone) |
How does HC SR501 work?
Working of HC-SR501 HC-SR 501 sensor is designed to detect such level of infrared radiation. It basically consists of two main parts: A Pyroelectric Sensor. A special lens called Fresnel lens which focuses the infrared signals onto the pyroelectric sensor.
How much current does a PIR draw?
Generally although a PIR-sensor-based lighting device will turn on when motion is detected, and will turn off when the motion disappears, the device still consumes 1-3 W power when the lamp is off. In our design the device consumes 0.007 W when the light is off, and is not only easy to set up but also inexpensive.
What is the range of HC-SR501?
7 meters
The HC-SR501 has a maximum sensing distance (detection range) of 7 meters. You can adjust the sensing distance by rotating the sensitivity potentiometer CW or CCW (see picture above). Rotating the potentiometer clockwise increases the sensing distance to a maximum of 7 meters.
What is the range of PIR sensor?
Since PIR sensors have ranges of up to 10 meters (30 feet), a single detector placed near the entrance is typically all that is necessary for rooms with only a single entrance.
Which IC is used in PIR sensor?
It seems that most small hobbyist sensors use the BISS0001 (“Micro Power PIR Motion Detector IC”), undoubtedly a very inexpensive chip. This chip takes the output of the sensor and does some minor processing on it to emit a digital output pulse from the analog sensor.
What is the range of HC SR501?