Featured on Hack a Day.
I got a friend who works for small start-up in a rented office. His problem is that they have only a single remote control to operate the parking lot gate. They needed a device that will allow them to open the gate by using the cell phone.
I built a device that connects to a phone line and to a standard remote control. The device is actually a “docking station” for the remote control. When a ring is detected the device will “press” the gate-open button on the remote control.
This is how it's set-up in the office: and this is how it's used:
This is how the remote control looked like when I got it, before the modification:
I modified the remote control by adding a 2-pin port to the RC, one wire connected to each button terminal: The remote control ended up looking pretty nifty:
First thing I tested the circuit idea: