Passive InfraRed (PIR), PIRs are basically made of a pyroelectric sensor, which can detect levels of infrared radiation. Everything emits some low level radiation, and the hotter something is, the more radiation is emitted. The sensor will under typical conditions, detect a human being moving around within approximate 10m from the sensor.
This is an average value, as the actual detection range is between 5m and 12m. The range is typically sufficient for the majority of interior spaces. Some garages may be large enough that one sensor cannot cover that whole area – we suggest testing this in the actual environment if there’s any doubt.

The sensor has a horizontal 110° vertical 60° field of view. The main blind spots are above, below or behind the sensor itself. A visible PIR motion sensor can be a great deterrent to intruders – but on the other hand, skilled intruders can avoid obviously visible sensors.

1. HC-05 – Bluetooth
2. Mpu 6050 accelerometer-gyroscope- -module
3. Flame-sensor
4. Rotary-encoder
5. Force-sensor-fsr400
6. Current-sensor-acs712
7. Flex-sensor
8. IR-sensor-tcrt5000
9. Pulse-sensor-pin
10. Color-sensor-tcs230
11. SD-card-module
12. Oled-with-arduino
13. Addressable-rgb-led-strip-ws1812
14. Relay-module
15. TFT-1-8-display-st7735r
16. 8×8-dot-matrix-display-max7219
17. Smoke-sensor-mq-2
18. Ultrasonic-sensor-HC-sr04
19. PIR-motion-sensor-hc-sr501
20. Tilt-sensor-sw-520d
21. Microphone-sound-sensor
22. Reed-switch-reed-sensor
23. Rfid-reader-Em18
24. Rfid-tag
25. RTC-real-time-clock-ds1307
26. Temperature-sensor-ds18b20
27. Moisture-sensor
28. Rain-sensor
29. Pressure-sensor
30. Accelerometer
31. MOC-3021-circuit
32. DHT11-DHT22-temperature-and-humidity-sensor
Installing PIR sensors:
1.Installation height is about 2.2 meters above ground.
2.Do not install the PIR sensors in direct sunlight or near any device which emits heat or cold.
3.Replace the batteries regularly.
How to test PIR:
• Collect 1.5V x 3 batteries or 5v DC power supply.
• Connect +Ve supply terminals to PIR- Positive pin.
• Connect -Ve supply terminals to PIR- Negative pin
• Connect a LED Anode to PIR Output Terminal in series with 220 Ohms Current limiting resistor with power supply ground or negative.
Result: Any objects detected by PIR, the LED goes ON its output.
On board setting: when detected any objects
1. The output goes High (setting is in high)
2. The output goes Low (setting is in Low)
Technical Details:
• Power Supply: DC9V (inner 9V battery)
• Static Current: ≤100mA
• Transmission Current: ≤20mA
• Frequency: 433MHZ
• Transmission Distance: less 80M
• Detective Speed: 0.3 ‐ 3m/s
• Detective Distance: 5 – 12M
• Detective Range: Horizontal 110° Vertical 60°
• Working Condition: Temperature –10℃ ℃ + 40
• Humidity ≤ 90 rh.

About the Author


Hello! My Dear Friends. I am Subramanian. I am writing posts on androiderode about Electronics testing and equipments.

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