At the end of the day I was always checking the overhead garage door on my house to make sure it was closed. I decided to install a flashing LED light that would let me know when it was open. This has saved me many trips down the steps from upstairs to check the garage door before going to bed at night.
Step 1: Tools and Materials
- Blinking red LED from Radio Shack.
- SPDT Switch with 3/4" Roller Lever from Radio Shack.
- Miscellaneous DC Wall transformer.
- A resistor for the LED.
- A piece of scrap aluminum.
- Miscellaneous wood screws and machine screws as needed.
- Miscellaneous two conductor light gauge wire.
The tools I used on the project were as follows:
- Cordless drill
- Hacksaw to cut aluminum material for brackets
NOTE: If you plan on using any tool for a project please make sure you are familiar with the tool and all of the dangers associated with it. If you are not familiar with a tool then you should ask someone who is to show you the proper way to use it. A lot of communities have classes at local colleges on the proper use of tools and machinery. There are also local woodworking clubs that offer classes at very reasonable rates for beginners. I highly recommend using these resources for your safety and for the most efficient use of the tool.
Always wear eye and hearing protection.
Always work safe with the proper safety equipment and guards on your tools.
Step 2: Determine Where to Install the Garage Door Switch
The switch is wired to the Normally Closed contacts so that there is no through circuit when the switch is depressed while the garage door is in the open position and the LED doesn't receive power. In order to do this I had to add a piece of aluminum on the top edge of the garage door. When the garage door closes the aluminum moves into position against the roller on the switch. When the garage door is open the lever is released and the switch goes into the closed position and power is supplied to the LED.
I made the mounting plate for the garage door out of some extra pieces of aluminum that I bent in a vide and then cut off with a hacksaw. They aren't pretty, but they work great.
Step 3: Determine Where to Install the LED Indicator Light
The box is also located on a common wall to the garage so I didn't have to run the wires very far.
The security box also has enough room in the back of it to fit the LED and the light can shine out through a few of the vent openings in the side of the box. When the garage door is closed and the LED isn't flashing then there is no way to see the LED.
Step 4: Find an Outlet to Power the LED
I used a cheap 3 volt wall tranformer from left over from another project.
Step 5: Run the Wiring Between the Light, Switch and Outlet
Make sure you use a resistor with the LED. You will need to determine the best resistor for the LED that you are using. I am not going to go into the specifics on that here as there are tons of tutorials on Instructables and other places on the internet. Here is a link to an online LED calculator.