This test might be manufactured utilizing just a single 4-position DIP switch, however the idea is simpler to comprehend if two switch congregations are utilized. The thought is, one change acts to hold the right code for opening the lock, while the other switch fills in as an information section point for the individual attempting to open the lock. All things considered, obviously, the switch get together with the "key" code set on it should be escaped seeing the individual opening the lock, which implies it must be physically found somewhere else from where the information passage switch gathering is. This requires two switch congregations. In any case, in the event that you comprehend this idea unmistakably, you may assemble a working circuit with just a single 4-position switch, utilizing the left four switches for information section and the correct four changes to hold the "key" code.
For additional impact, pick diverse shades of LED: green for "Go" and red for "No go."
PARTS AND MATERIALS
- 4001 quad NOR gate
- 4070 quad XOR gate
- Two, eight-position DIP switches
- Two light-emitting diodes
- Four 1N914 “switching” diodes
- Ten 10 kΩ resistors
- Two 470 Ω resistors
- Pushbutton switch, normally open
- Two 6 volt batteries
SCHEMATIC DIAGRAM:
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