Door Opening Alarm (Hall Sensor)
Review: 5 - "A masterpiece of literature" by , written on May 4, 20020
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Door Opening Alarm (Hall Sensor)

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  • Product SKU: LGKT123
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₹ 349 ₹ 449
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Highlights
  • Product Code: LGKT123
  • Technical Support: upto 30mins Video support
  • Handmade
  • Make in India
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  • 20% Deposit before shipping
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Details
  • Unsoldered PCB and all components to be soldered on PCB.
  • Includes all ICs, Connector wires and Hall Sensor.
  • Documentation: PCB Specifications Component list, and Circuit diagram.
  • Power Supply: No battery included, Includes 12 Volt DC adapter with the kit.
  • Video tutorial is available on YouTube.
  • One set of the readymade in working condition.
  • Includes all ICs, Connector wires and Hall Sensor.
  • Documentation: PCB Specifications Component list and Circuit diagram.
  • Power Supply: No battery included, Includes 12 Volt DC adapter with the kit.
  • Video tutorial is available on YouTube.

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Specification

Description

This simple Kit door-opening alarm uses a hall sensor to produce sound when someone opens the door. The circuit can be installed at a workshop, office, or home for security purposes. The 3-terminal hall sensor is easily available in the market. When the door is closed, neither the buzzer sounds nor LED glows. But when the door is opened, the buzzer sounds and LED glows.

Hall sensor MH183 is a magnet-operated solid-state sensor. When the magnet is brought near the sensor, its output goes low. This low output is amplified by the NPN transistor. NPN transistor inverts the operation. The magnet should be fitted on the moving part of the door and the sensor at the door frame. When the door is closed, the magnet comes close to the sensor and the alarm is off. But when the door is opened, the alarm makes a sound. The Door Opening Alarm Sensor buzzer can be replaced with a 5V relay to control a mains alarm. 

Block Diagram

Physical Attributes

  • Dimensions (cm) L x W x H : 20 x 15 x 5
  • Weight (gm): 200

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Customer Reviews

Based on 3 reviews
67%
(2)
33%
(1)
0%
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A
Arnab Kumar Das
its Amazing

Very good & Amazing working project & kit

N
Nishal N. Shettigar
Nice

Working Ok

R
Rishanbor Khyriem
Well !

Good one, easy to assemble. working properly. For best sensing, cover the sides of Hall Sensor.