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Arduino DTMF audio code locker

Device listens for dial tones from mobile phone and unlock locker.

sziklaiSziklai
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This device listens for dial tones from any mobile phone via a microphone.
No special apps are required on the phone - just the built-in dialer.
When the correct code sequence is received, the lock pin goes high and unlocks the locker.
If the code sequence is the master code, you can change the unlocking code.
Both codes are 6 digits. Standard 0 to 9 * and # tones can be used without any app.

More details on github.

DTMF_locker_bootloader.hex

Firmware

hex - 25.27 kB - 01/19/2025 at 13:33

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  • 1 × adruino (atmega328)
  • 1 × microphone with amp
  • 1 × RGB led
  • 1 × electromagnetic locker with driver

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