Subsystem: P4 |
Task
Title:
Theft Alarm |
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Latch
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Introduction and Aims
To create an alarm system that is triggered by a wire or contact being broken. This is similar to the type of alarm used in shops to protect valuable electrical items - such as computers. Once triggered, this system will remain activated and not turn off until it has been manually reset by pressing a button.
Modelling the System/Circuit There are different ways to model and test circuits before components are soldered to a P.C.B.. Modelling is an important stage as it helps you spot any problems and make modifications more easily. Method 1: Breadboard Using this method, components are pushed into the interconnected holes as shown in the diagram below. The lines shown, indicate which holes are internally connected. Method 2: Computer Simulation To begin, ask your supervisor if circuit simulation software is available on your PC. This method allows you to build up your circuits quickly and cheaply in a virtual environment but will not give you hands-on experience of the components you will be using when finally soldering your P.C.B.. Method 3: Using OnTrack modelling hardware
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