A very simple but highly efficient combination lock circuit is shown in the figure. Any type of on/off switches can be used, varying from commercially available inexpensive types to more sophisticated ...

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A wireless lock that's easy to use in daily situations without any fuss. Access can be shared with other people. Status and location of locks can be tracked in the app. Smart fail-safes. Works across ...

This simple code lock circuit described here is of an electronic combination lock for daily use. It responds only to the roght sequence of four digits that are keyed in remotely. If a wrong key is ...