The $3.00 sprinkler timer

John writes –

A few years ago we built a large cover over our back deck, and shortly thereafter put up a few hanging baskets for flowers. Here (in Arizona) the summers are hot enough that you have to water the baskets at least twice a day to keep the flowers alive. The problem: I forget. Miss watering for one day and there are three hanging baskets of dead and dried flowers. Trust me, I’ve got three years of dead daiseys under my belt here, and Lisa doesn’t let me forget it. Obviously we need an automatic sprinkler system.

Hacker’s Bench : The $3.00 Sprinkler Timer – Link.