Homemade Garage Door Sensor

How many times have you accidentally left you garage door open all night, revealing all the tools, bikes, and other stuff are available to thieves – who might even enter your home via the door from your garage. It’s not uncommon. But now, there’s a new homemade “Hey dummy, you left your garage door open” reminder system!

At a cost of less than $40 this is a really clever idea.


An open switch activates a small but annoying light in the master bedroom. If the garage door is open, you’ll see it at night when you turn out the lights when you turn into bed. It’s unobtrusive, but extremely functional!

Take a look!

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