SubSystem : P4 |
Task
Title:
Theft Alarm |
Name: |
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IP1,
P4, OP1 Modules |
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2, Use two white leads to connect the OP1 module to the Fixed Tone Piezo Sounder (Buzzer). You will then need to use two more leads to connect it in parallel with the L.E.D. To do this "stack" the leads as shown (Make sure the positive and negative connections are made properly). 3, Adjust the 20K variable resistor on the Component Card so that the arrow faces straight down. Its value should now be about 10K ohms. Now use two white leads to connect it to the IP1 module. 4, Connect two crocodile leads to the other sockets on IP1. Clip their ends together when you have done this. 5,
Check your wiring is accurate and then connect the 9 volt power supply. |
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Testing and Investigating: 1, Check the alarm circuit has been correctly wired up by pressing the RESET/ TEST button on module P4. The buzzer and light should operate after it has been pressed. 2, Now unclip the two crocodile clips and see if the alarm is triggered. 3, Attempt to stop the alarm by reconnecting the crocodile clips- Does it? 4, Press the RESET button again to disable the output. 5, Loop a length of wire through the handles of some bags and connect each end to a crocodile clip. Reset P4 and test your burglar alarm using a pair of side cutters to break the wire. Adapt it now to prevent people going in your bag.
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