Assignment ) Develop a Sensor Circuit using commodity components
The first part of the assignment is to design a prototype of home security system with passive proximity sensor, light sensor, temperature sensor and examine its performance.
Note: You have to demonstrate the working of the circuit by the deadline. Report will be submitted with the second part of the assignment.
Youare to design the security system with the proximity, light and temperature sensors. All sensors should be incorporated in one big circuit and if any sensor senses an intruder then it should trigger an alarm. The alarm could be flashing of LED or a speaker in the prototype circuit. The circuit should be designed and demonstrated . You should have a schematic of your circuit during demonstration. This prototype circuit will be used in the wireless part of the assignment. Therefore, you should keep it in a safe place for later use.
The report should address following topics
- The role of Encoder and Decoder in this circuit?
- Legal implication of using 433MHz band?
- The distance coverage of the wireless node with provided components
- How to increase the range of wireless node and discuss the improvements for this circuits
The report should also provide the recommendation as how to implement your prototype circuit in real time to provide home security. The justification for real-time circuit should be in terms of extra components, voltage and current requirements. In addition, state issues related to the practical implementation of the system and provide the possible solutions.