Simple project: Escape room switch locks.

[TilenThaler]

A customer of mine manages a few Escape rooms in Ljubljana, so he occasionally asks me to develop a problem for him.

Recently he needed two simple locks, preferably electronic and they have to be one red, the other blue.

So, I proposed two simple solutions, no programming needed, because that would have made the lock much more expensive.

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[jdurand]

Any problems with the LED blowing from inductive kickback?

Personally I'd either use an AC LED or put a verse biased diode across the LED. I might even put a small capacitor across the LED to slow down the dV/dT from the coil.

[TilenThaler]

Good question.

No, no burnt LEDs yet.