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 movable 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. Note: This is an educational kit and should not be used to secure anything of value. This product is designed and manufactured in the UK by Kitronik.