In this post, we’ll teach you how to make a simple electronic lock using a good ole 555 timer. The concept is very simple. We wire an IC 555 in monostable mode and connect three switches in series between trigger(2) and GND. Only when all the switches are active, will the IC activate. Also connect [...]
In this post, we’ll teach you how to make a simple electronic lock using a good ole 555 timer. The concept is very simple. We wire an IC 555 in monostable mode and connect three switches in series between trigger(2) and GND. Only when all the switches are active, will the IC activate. Also connect three switches in parallel between reset(4) and GND. If any of these switches are active, the circuit will reset and never activate.
If the switches are scrambled on a keypad, the circuit will activate.
The output from 3 can be taken to activate a motorised lock or as a trigger for some other circuit.
The circuit design is shown below
Leave Your Response