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.
- 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.
- 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.
- PCB Length: 51mm.
- PCB Width: 41.5mm.
- 4 x AA Batteries.
- 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: This is an educational kit and should not be used to secure anything of value.
Teachers can order a sample of this kit (one per school) here. You will need to select the kit from a list of all the sample kits; the stock code for this kit is 2101.
Note: this service is only offered to schools for evaluation purposes only.
This kit is designed and manufactured in the UK by Kitronik.
I need a kit that will give out sound for a siren.
Posted byon Thursday, 13 October 2016
This kit sounds an alarm when the microswitch is moved. I'm not really sure what you have in mind. If you email email@example.com with a little more information about what you want to do we mght be able to suggest something.
Hi, I am looking to build something similar to https://vimeo.com/44786265 but at a much lower cost. This kit seems more suitable. Could you please advise on the components that I would need in order for the alarm to be key activated but only deactivated with a reed switch. I will source the box from elsewhere, but if you would provide a list of the components needed that would be great! I am intending on selling this on my prank website so would look to make a bulk order of components once I have completed one successful build. Thanks Peter
Posted byon Friday, 18 December 2015
Unfortunately it wouldn’t be possible to build that circuit using this kit. Do to the way the circuit has been designed it wouldn’t be possible to have it were it can only be deactivated with a reed switch. We also don’t sell any kits that would do what you require.
How long would this kit take to assemble?
Posted byon Tuesday, 7 May 2013It would take roughly between 10 and 20 minutes depending on how good you are at soldering. Maybe a bit longer if you have not soldered before.
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