Week2

We continue to optimize component performance based on the first week.

During the second week, main mission objectives include:


1. Mathematically map the different distances of the ultrasonic sensor to the frequency of sound vibrations

2. Study the communication between secure digital card and board




First, we built the circuit and entered the code into the Arduino Uno board.







We simulated the component circuit connection diagram through simulation to make the circuit more intuitive.








We then researched and tested SD card. By using an SD card to store played strings and then reading them, automatic playback is achieved. But there is a problem with the adjustment process of the SD card. 






Arduino cannot directly read the information in the SD card and requires a new compiler, so this solution was abandoned.



Generally speaking, the progress of the experiment this week was not very smooth. The instability of ultrasonic sensors greatly reduces the effect of sound frequency changes. Based on the first week of experiment, we found that the poor sound quality of the buzzer also affected the experimental results.






The video above records the effect of the sound vibration frequency changing as the distance changes on the ultrasonic sensor part this week. The final sound effect is emitted via a buzzer.




At this point, we have completed the testing and development of all components. Next week we will actually simulate making different instrumental sounds and be able to implement changes in the audio. Looking forward to surprises next week.









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