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:
This is an educational kit and should not be used to secure anything of value.
Documents & Downloads
- 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.
Shipping rates Australia wide and New Zealand
FAQ:
- How do I estimate shipping for my order?
- Add products in the shopping cart and head to the checkout page to estimate the shipping.
Dispatch time
Unless expressly agreed otherwise with you, we will not commence delivery of an order until we have received cleared payment of the purchase price in full.
All orders placed before 11 am AEST (Monday to Friday) will ordinarily be processed on the same day.
We will endeavour to ship the Products by the applicable time indicated on the website, but all times are indicative only. All shipping times are dispatch times only, and actual delivery dates will depend on the shipping method chosen, delivery address and delivery service provider.
Note- Please make a note during purchase if you require any item urgently. However we cannot guarantee that we will be able to comply with any request.
*Go to Australia post delivery time calculation to get various Australia post service in your area please use our shipping postcode Thomastown, 3074 as the "from" address - https://auspost.com.au/parcels-mail/delivery-times.html?ilink=tools-open-deliv-times.
We ship all products throughout mainland Australia, Tasmania and New Zealand - Including Darwin, Melbourne, Sydney, Tasmania, Adelaide, Brisbane, Perth, all metro and regional areas but do not deliver to areas in Australia where the Australia Post delivery network is not available.
Check Express shipping delivery coverage area at - http://auspost.com.au/parcels-mail/delivery-areas.html
Receipt of deliveries
Deliveries to post office boxes are not permitted where delivery is by courier. If delivery is by courier and nobody is available at the delivery address to accept delivery when delivery is attempted then the courier may either:
- leave the relevant parcel at the unattended address (the courier will do so if specified in your delivery requirements); or
- re-attempt delivery at a later time or date, in which case we may charge you an additional re-delivery fee.
Note that if a delivery is left unattended at the shipping address and is subsequently stolen then the theft is your responsibility, not ours.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.