๐ ๏ธ MAKER GUIDEApr 24, 2026โขโฑ๏ธ 1 min readโข๐ณ๐ต Tested in Nepal
Magnetic Reed & Hall-Effect Window Entry Alarm System
Secure residential doors and windows with concealed Hall-effect magnetic sensors and loud buzzer alarms that trigger immediately upon breach.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
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Estimated Total (5/5 items):
NPRย 1,030
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NPRย 140
NPRย 750
NPRย 40
NPRย 50
NPRย 50
Magnetic Reed & Hall-Effect Window Entry Alarm System
Detect window breaches instantly using the 3144 Hall Effect Magnetic Sensor Module with an Arduino Nano and Active Buzzer powered by a 9V battery.
Hardware Bill of Materials:
- Magnetic Sensor: Hall Effect Magnetic Sensor Module A3144 with Comparator LM393
- Microcontroller: Arduino Nano V3.0 Solderless
- Audible Siren: Active Buzzer (5V)
- Power Supply: 9V Battery + 10CM DC 9V 5.5*2.1mm Battery Button Power Plug
Circuit Pinout & Wiring Connections:
| 3144 Hall Module Pin | Arduino Nano Pin | Function / Description |
|---|---|---|
| Hall Sensor VCC / GND | 5V / GND | Magnetic Switch Power |
| Hall Sensor Digital OUT (DO) | Pin D2 (INT0) | High when Magnet Removed (Window Opened) |
| Active Buzzer (+) | Pin D8 | High Decibel Entry Alarm Siren |
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