Kitronik Alarm Project Kit

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 seperate 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 of these 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 & buzzer can be placed into a box designed by the student.

Features:

• Can be enhanced with a key switch to arm/disarm.
• Can be enhanced by replacing the micro switch with a magnetic door contact switch.
• Entry delay for disarming.

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.

Possible applications include:

• Adding an alarm to a cookie/biscuit tin.
• Adding an entry alarm to a door.

Dimensions:

• PCB Length: 51mm.
• PCB Width: 41.5mm.

Requires:

• 4 x AA Batteries.

Resources:

• Click here to download the essential information.
• Click here to download the full teaching resources.

This kit is supplied in a simple grip seal bag.

Note: