My (infra-red) Remote Control unit, made some 25 years ago, uses this 12 button remote to control a variety of stuff in and outside the house.
I want to add a new function: toggling a security light near my shed workshop. Although I have a couple of buttons still unused, I want to avoid the hassle of fresh wiring and holes drilled through two walls.
One of the existing devices is a 'Shed Chimer. Key #3 sends a 14V DC pulse to the shed while held (typically by my wife to get me back in the house). So my idea is to use that. Three or more input pulses within say5 seconds would generate a brief output pulse. I would then use that as input to my light-triggering circuit. The only drilling would be through the wood side of the shed.
I'm a bit rusty so would much appreciate any circuit logic suggestions please, ideally using my old CMOS devices (4001/4011/4013/4017/4016/4066, etc).
Terry, East Grinstead, UK