Electronic lock system built with CircuitPython on a Raspberry Pi RP2040, using a 4x4 matrix keypad, LED feedback, and an active buzzer.
python iot microcontroller adafruit embedded-systems led circuitpython buzzer keypad security-system matrix-keypad electronic-lock diy-electronics rp2040 rasperry-pi-pico
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Updated
Jul 2, 2026 - Python