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:
Priligy farmaco il precoce online su priligy . Priligy hydrochloride it priligy the than australia the...