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A low pulse on this pin (below 1/3 of VCC) sets the internal flip-flop and makes the output go HIGH. When the voltage on this pin reaches 2/3 of VCC, it resets the flip-flop, and the output goes LOW.

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🔐 A password-protected smart door lock system using Arduino, featuring keypad input, LCD feedback, and servo-controlled access. ⚙️ Simulated in Tinkercad and built for real-time security automation ...