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Start working on the basic circuit, and we found that when we pressed the button, there was no sound from the speaker...We were wondering whether the circuit or the code went wrong...Then we used the led to do a test.
Then we figured out there is something wrong with the circuit.
We were stuck on how to design the physical part, the distance between each buttons are too small. Then we decided to solder the buttons.
making the housing box
Making the physical installation
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