F16: Door Alarm System
Contents
Project Title: Door Alarm System
Abstract
Our project would use a motion detector and light sensor on the SJOne board to control the output of a speaker. If the someone opens the door during daytime, the speaker would output a song as a welcome. However, if the door opened at night where there’s no light, the speaker would output an alarm because there might be thieves coming in during midnight.
Objectives & Introduction
The objective of this project to create a realizable indoor anti-theft system. The system is able to detect the people's motion by using the motion sensor, and judge the current brightness by using the on-board light sensor.
In order to accomplish the objective, we need to the following things:
> Modified the Pulse-Width Modulation(PWM) source code to allow the speaker to play a song. > Figure out how to amplify the sound signal. > Using the ADC code to receive the signal from motion sensor.
Team Members & Responsibilities
- Bowei Zhang
- Program the speaker.
- Programming the ADC code.
- Testing the software.
- James Huang
- Improve the playing song algorithm.
- Design the hardware connection between MCU and external parts.
- Programming the ADC code
Schedule
Show a simple table or figures that show your scheduled as planned before you started working on the project. Then in another table column, write down the actual schedule so that readers can see the planned vs. actual goals. The point of the schedule is for readers to assess how to pace themselves if they are doing a similar project.
| Week# | Date | Task | Completion | Comment |
|---|---|---|---|---|
| week1 | Oct31 - Nov4 | Project Plan & ordering parts | Incompleted. | Haven't ordered the parts. |
| week2 | Nov 7 - Nov11 | Circuit Design & Writing Software (part 1) | Completed | Finalizing the idea. |
| week3 | Nov14- Nov18 | Circuit Design & Writing Software (part 2) | Incomplete | Speaker with low volume. Consider ordering Amplifier. |
| week4 | Nov21- Nov25 | Finish Testing | In completed | Motion Senor came with damage. Ordering new one. |
| week5 | Nov27- Dec2 | Project Report | Completed | Working on Report. Waiting for sensor. |
| week6 | Dec 3 - Dec9 | Cont. Testing & finish project report | Incomplete | Waiting for Motion sensor. Consider moving to plan B. |
| week7 | Dec12- Dec16 | Cont. Testing | Completed | Report finished. Testing sensor. |
| week8 | Dec17- Dec19 | Finish Report & Testing | Completed | Done |
Parts List & Cost
| Part Name | Quantity | Cost | Notes |
|---|---|---|---|
| SJone Board | 1 | $80 | SJone Board |
| Speaker module | 1 | $2 | Buzzer |
| SD card | 1 | ~$10 | |
| LEDs | 4 | <$1 | |
| Motion Sensor | 1 | $15 | Detector |
| Signal Amplifier | 1 | $1 | 2N3904 |
Design & Implementation
Block Diagram
The following figure is the system level design of our project.
Hardware Design
Discuss your hardware design here. Show detailed schematics, and the interface here.
Hardware Interface
Pulse-Width Modulatio(PWM)
- As the Figure 1 showed,we connected the speaker with an 2N3904 Amplifier, and then connected it to the on- board PWM Pin (pin2.0)directly. When the speaker output condition is triggered, pin 2.0 will send a PWM signal to the amplifier and it will be amplified to allow the speaker output louder.
Analog to Digital Converter(ADC)
- In order to receive the data from motion sensor, we connected it with the on-board ADC pin (pin 2.6), the ADC pin will send a 20us trigger signal to trigger the sensor, and then the sensor will return an analog signal. By decoding the signal, we will able to know did the sensor detect something or not.
General Purpose Input/Output (GPIO)
- The General Purpose Input/Output(GPIO)Pin is used to control the LEDs.
Software Design
Show your software design. For example, if you are designing an MP3 Player, show the tasks that you are using, and what they are doing at a high level. Do not show the details of the code. For example, do not show exact code, but you may show psuedocode and fragments of code. Keep in mind that you are showing DESIGN of your software, not the inner workings of it.
Implementation
This section includes implementation, but again, not the details, just the high level. For example, you can list the steps it takes to communicate over a sensor, or the steps needed to write a page of memory onto SPI Flash. You can include sub-sections for each of your component implementation.
Testing & Technical Challenges
Describe the challenges of your project. What advise would you give yourself or someone else if your project can be started from scratch again? Make a smooth transition to testing section and described what it took to test your project.
Include sub-sections that list out a problem and solution, such as:
My Issue #1
Discuss the issue and resolution.
Conclusion
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Project Video
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Project Source Code
References
Acknowledgement
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References Used
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Appendix
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