The Hc Sr501 PIR Motion Sensor Datasheet is the key to understanding and effectively utilizing this ubiquitous and affordable motion detector. This document provides essential information about the sensor’s specifications, operating characteristics, and application circuits. Grasping the details within the Hc Sr501 Pir Motion Sensor Datasheet enables hobbyists, engineers, and makers to integrate this sensor into a wide array of projects, from simple security systems to advanced home automation solutions.
Deciphering the Hc Sr501 Pir Motion Sensor Datasheet and its Applications
The Hc Sr501 PIR (Passive Infrared) motion sensor is a small, low-cost device that detects movement by sensing changes in infrared radiation emitted by objects in its field of view. The Hc Sr501 Pir Motion Sensor Datasheet is your guide to harnessing this technology. It details crucial parameters such as the sensor’s operating voltage (typically 4.5V to 20V), current consumption (very low, usually less than 60uA at 5V), detection range (up to 7 meters), and detection angle (around 100 degrees). Understanding these parameters is vital for proper integration and optimal performance.
The datasheet also explains the function of the sensor’s three pins: VCC (power supply), OUTPUT (signal), and GND (ground). The output pin goes HIGH (typically 3.3V) when motion is detected and LOW when no motion is detected. The duration of the HIGH signal is adjustable using the two potentiometers on the sensor. One potentiometer adjusts the sensitivity (detection range), while the other adjusts the time delay (the duration of the HIGH signal after motion is detected). Typical pin configuration includes:
- VCC: Power supply (4.5V-20V)
- OUTPUT: Digital output (HIGH/LOW)
- GND: Ground
Applications of the Hc Sr501 are widespread. It is commonly used in:
- Security systems to detect intruders.
- Automatic lighting systems to turn on lights when someone enters a room.
- Motion-activated cameras to capture images or videos of moving objects.
- Gesture recognition projects.
For instance, you could set up a simple alarm system. When motion is detected, the sensor triggers an alarm sound or sends a notification to a smartphone. The delay potentiometer allows the user to set the duration of the alarm. A simple representation is shown below:
| Feature | Description |
|---|---|
| Detection Range | Up to 7 meters (adjustable) |
| Operating Voltage | 4.5V - 20V |
| Output Signal | 3.3V HIGH when motion detected |
Now that you have a better understanding of the Hc Sr501 PIR motion sensor, it’s time to dive deeper! Refer to the official datasheet for a comprehensive overview of its specifications and operational characteristics. The datasheet contains all of the information needed to implement it correctly.