PROJECTS ELECTRONICS: FUN & FUNDAMENTALS
Key-Card Door Lock
Pick-proof, programmable security without a microcontroller.
TIME: 2 HOURS—2 DAYS COMPLEXITY: MODERATE TO HIGH
Almost anyone can learn to pick a typical door lock. The most common method is to jiggle the tumblers by inserting a tool known as a “rake,” while applying turning force with a tension wrench. When the tumblers are aligned, the cylinder rotates and you can walk right in.
When I first started thinking about a pick-proof electronic lock, I ...
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