Hacked Gadgets Forum

August 3, 2010

Garage Door Code Opener

at 10:19 pm. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks


Mike Szczys from Jumptuck created this cool circuit a to open his garage door using a small door bell. Many of us know Mike from his work at Hack a Day. I am honored that this design was inspired by my Button Code project! His project is based around an ATtiny13 microcontroller just because that is what he had laying around.

Thanks Mike.

“Here’s how it works:

  • The uC waits for a button press, then flashes the LED to let you know it’s ready for the first number
  • You press the doorbell multiple times until the first number has been reached, then wait for the next LED flash… repeat
  • Once all the digits are entered the uC checks for the proper code and opens the door (or flashes if you didn’t get it right)
  • The code can be changed by pressing a button on the circuit board (button will flash continuously). The new code is then entered the same way as above, stored in EEPROM, and read back to you in a series of blinks.”


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