You will need:
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.
- 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
Step 1: The circuit
When soldering, please remember to make sure you are in a well ventiled area, and wearing safety glasses and any other protective equipment you are comfortable with (apron or similar).