This tutorial will help you modify an old analog camcorder and convert it into a Night Vision device.
If grid power were to go down, think of how many towns/cities would be thrown into complete darkness once the sun set.
Think how, during a blackout, your local street becomes an eerie curtain of darkness.
After modification, you could even craft a hidden set up outside your home to monitor any unwelcome visitors that are curious on who's (and what's) inside your home.
Do you have an old analog camcorder at home? If not, they are super cheap and full of handy electronic components.