Hacked Gadgets Forum

December 8, 2009

Button Code – Single Button Code Entry System

at 2:13 am. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks

 This is a project that I have been working on, it is just completed and ready to go! The video may be a bit dry since it is just going over the features and how to use the controller. If you want to see it interfaced to a rotary phone have a look at around 7:40 minutes into the video.

The Button Code is a system that allows a single button to act as a keypad. The user enters a 4 digit code into the system using button taps. The button can be placed where the public can access it since like a keypad there are many combinations to keep guessers from activation the system. When the correct code is entered a form-C relay is activated (Normally Open and Normally Closed relay contacts). When activated it can either activate for a programmed time or simply toggle the output whenever the correct code is entered.

This simple circuit allow for simple control of things such as:

  • Garage Door Openers – Pulse the door open button for a second to operate.
  • Lighting – Toggle to turn on, toggle to turn off.
  • Door Access – Pulse the door lock for 3 or 4 seconds.
  • Simple Security System – Toggle  alarm power on or off.


To purchase this controller please have a look at our online store.