The circuit described here is an electronic combination Security Code Lock. It opens only when you press four keys in the correct sequence (referred to as a code) out of a total of eight keys installed at your entrance door. If you press the wrong key sequence, the circuit resets, and the lock will not […]
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Credit- EFY. Distributed by Department of EEE, ADBU: https://tinyurl.com/eee-adbu
Curated by Jesif Ahmed
