Buzzer locker?

Description:

This simulates a locker in which that the piezzo-buzzer will beep in a higher frequency (means that it reads the correct values) if the right combination of values of potentiometer is set, else it will beep in a lower frequency (wrong value is read)

Materials:

- Arduino

- Potentiometer

- Speaker

Arduino Code:

https://hkn.eecs.berkeley.edu/~hilfialkaff/files/buzzer_lock.pde

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