This Arduino-based night security light can protect your home/office from thieves/intruders at night. The light glows when movement is detected in front of the PIR sensor. Simultaneously, a piezo buzzer also sounds.
Features of the Night Security Light System:
- Automatic Activation: The light turns on when it’s dark and motion is detected by the PIR sensor.
- Duration Control: Upon detecting movement, the light remains on for ten seconds. If motion is detected again within this time, the countdown restarts.
- Daylight Sensing: The system remains off during daylight even if motion is detected.
- Incorporation of a Piezo Buzzer: A piezo buzzer sounds simultaneously with the light to alert during intrusions.
Video Tutorial In English
Video Tutorial In Tamil
The prototype of the Arduino-based night security light system is shown in Fig. 1.
|– BC547 NPN transistor||– Arduino board|
|D1||– 1N4007 rectifier diode|
|Resistors (all 1/4-watt, ±5% carbon):|
|T1, T2||– BC547 NPN transistor|
|CON4||– 2-pin connector|
|CON2||– 3-pin connector for PIR|
|PZ1||– Piezo buzzer|
|– PIR motion sensor|
|– Jumper wires|
|– 12V, 1C/O relay|
|– 60W, 20V AC bulb|