Design and construction of sound detector with alarm system
Table Of Contents
- Title pageApproval pageDedicationAcknowledgementAbstractTable of contentsCHAPTER ONEINTRODUCTION1.1 General description of project1.2 Design objectives1.3 Significance of the project1.4 The report layoutCHAPTER TOWLITERATURE REVIEW2.1 Historical background of the project2.2 Theories and models relevant to the design2.3 List and description of the system component2.4 Distinction between the existing method of design and the new approach.CHAPTER THREESYSTEM DESIGN3.1 Description of the system building blocks3.2 System design specification3.3 Block diagram of the system3.4 Description of the overall operation of the system3.5 Component list3.6 Complete circuit diagram of sound detector with alarm system.CHAPTER FOURImplementation testing and resultsCHAPTER FIVECost analysis conclusion and recommendationREFERENCE.
Thesis Abstract
This project is design and construction of a sound detector with alarm system was done primarily to detector sound. It can be use in industrial and domestics. It employ four discreet stages with power supply which power the system.
The 1st block is pick up amplifier containing the microphone and the input which serve as a transformer which the function is to pick up the smallest sound that comes close to the amplifier
The second block is comparator with hysterias. The function as analogue to digital convector and also it help to accumulate amparm sound like sound of the gun short or any other heavy sound
Block three. This is transistor switching this stage consist three bipolar function transistor (BJI) with a decay circuit found using capacitor time constant (T – RC) with a 12v Re let, it output work function is to switch the alarm circuit.
Block four. This is the Alarm circuit, it’s function is the alarm tone. It is an stable mutivibertor that produce 1kH2 tone frequencies which sound as alarm signal with loud speaker which serves as an output transformer.
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