Get out of my chocolates! Stay out of my desk drawer! This little alarm circuit will help to keep your goodies safe - whether it's your secret stash of chocolate in the office, or your diary in the bedroom drawer....
You will need:Tools
Something to case it all in - whatever takes your fancy! (See step 2 for more information on this part...)The education bits
I normally run this project with KS3 students (11-14 year olds), as part of an all-round approach to Design Technology, incorporating systems and control with resistant materials. Dependant on age and ability, all students either make simple wooden casings, using box joints, or we do this as part of a sustainability, and use recycled packaging to house the alarm. This instructable only really covers the circuit itself, there'll be more coming on casings soon.Learning Objectives
all to be able to give examples of the applications of simple electronic components
most should be able to suggest alternative applications for the buzzer and LDR
some may be able to explain how to reverse the action of the alarm (to become dark activated), and spot trends with the use of components.
improve skills with soldering
to be able to suggest interesting and innovative ways of casing the alarm
to consider the user, and target products appropriately