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Alarm Project Kit

2101 - Alarm Project Kit

Kitronik Ltd.

This kit can be used to make a shed or room alarm when mounted on the top of a door, drawers or any other object with a moveable opening. It can also be used by replacing the micro switch with a magnetic door contact. A micro switch acts as a trigger mechanism and is armed / disarmed by a separate sliding switch. The door's movement is detected by a micro switch mounted onto a door or object with a lid. A timer provides an entry delay during which the system can be disarmed by the slide switch, whilst a separate timer silences the alarm after two minutes. Both timers are implemented via a 556-dual timer IC. The alarm can be further enhanced by using a simple key switch for arming / disarming or by replacing the micro switch with a magnetic door contact switch to activate it. The board, battery pack and buzzer can be placed into a box designed by the student.

Features
Contents:
  • 1 x PP3 Battery Clip Lead (Heavy Duty)
  • 1 x 4xAA Battery Cage with Clip
  • 1 x Miniature DPDT Slide Switch
  • 1 x NE556 Dual Timer IC
  • 1 x IC Socket 14 Pin
  • 1 x Piezo Buzzer (with Drive)
  • 4 x Capacitor, Ceramic, 50V, 10nF
  • 2 x 100uF Cap Low Leakage
  • 3 x 10KΩ Resistor
  • 1 x 220KΩ Resistor
  • 2 x 1.2MΩ Resistor
  • 1 x Micro Switch with Medium Lever
  • 1 x Red 5mm Diffused LED - 275mCd
  • 1 x 330Ω Resistor
  • 1 x Alarm Project Kit PCB
Specifications
  • Kit Type:Project Kit
  • Main Purpose:Audio Control
Parts