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DIY Science Projects

Magnetic alarm

Why not build a magnetic alarm to protect your room or your drawers from any intrusion !

 

This project is an electronic device which detects the proximity of a magnet. If the magnet is moved away, the alarm will ring.


Difficulty
Medium
Duration
2h
Rating
3/5
Price
~ 15 CHF
Testimonials
0

Material
Tools
Blueprints&Plans
Building
Bend the legs of the transistor as shown on the photo. Insert the transistor into the strip of connectors as shwon on the photo.   Insert it the right way up (flat side up)   ... Insert the 3.9 K ohms resistor as shown on the photo and screw the connector indicated with two dots ..   the ...Insert a 10K Ohm resistor as shown on the photo and screw the connector with no dots. Solder the end of the 6cm wire with the reed switch as shown on the photo.   If you don't have a soldering iron, you can ...Insert the reed switch as shown on the photo. Tighten the 2 screws involved. Drill a hole at 2cm from the top of the box lid and pass through the buzzer wires.   Glue the buzzer just below the hole. Connect the wires of the buzzer to the strip of connectors as shown on the photo.   Follow the colours of the ... -Connect the two 12 cm wires to the strip of connectors : Red = Terminal 4 (: :) and black = Terminal 1 (.)   Screw the 2 ... Insert all the elements into the box and paste the strip of connectors into position as shown on the photo.   Close the ...
How to use
Links&References
Date30.04.2013
AuthorEmmanuelle
Organizationinfo-energie
TranslatorMartin
Final purposeCommunicate, transmit information
FieldElectrical/Electronical circuit, Robotics
Languagefrançais deutsch english
Licence