When visiting Lowe's, the other week, I saw a strange electronic safe.
The silvery cover with buttons, etc, could easily pop out, which is what I did, to look at what is inside.
On the inside of the cover, there was a battery compartment, some PCBs, and a telephone style wire going to inside the safe.
My question is this.
Is there some smart circuitry inside the safe, such that the cover only sends electricity and keypad signals to the "brains" inside the safe, and the "brains" decide when to open the lock based on keypad combination.
Or, is it perhaps a bullshit "safe" where the brains are in the PCBs outside and that sends current to the door opener inside through the wire? In this case, the safe could be opened by simply applying battery voltage to the wires going inside, bypassing PCBs.
I know that no one can say for sure. What makes me suspect the latter is that there are basically too few conductors inside a typical telephone wire to send all those keycodes. It can be done, I suppose, but maybe it is not. Any thoughts?
i