So recently there was a tornado watch storm that hit 90mph in my area late night/early morning. My ADHD son was going nuts as he is afraid of the dark.
I did some research into emergency lighting and found most required to be hard-wired into my home's wiring (at a cost of $200+ an hour for electricians to do, its not in my budget).
So I remember going through some basic electronics book when I was younger and remember some basic circuitry that stays 'open' when there is a current provided (low) and is 'closed' when the current cuts out.
I found a cheap $5 outlet tester in home depot which has a few LEDs on it to let you know if the outlet is active and correct and I believe I can use the use the 'active' state of those LEDs to provide this signal to keep a circuit open until power loss occurs.
So my question is, (as my memory fails me) how would I construct this, as I only remember it having something to do with a very basic transistor or MOSFET (or both?)... The LED light would be battery powered (like a work light)
Your advice and thoughts?