How do I make a circuit that acts like a set of radio buttons, i.e only one LED can be selected at a time. Answered
I'm trying to make a timing light for use in toastmasters and would like to know of any IC's that can help me out. I've already come up with 2 possible solutions, but both seem more complicated than necessary.
All I want is to have 3 LEDs with 3 associated push buttons. Any time an LED is selected via a button, any LED that was already on turns off, so that only one LED is on at a time. A rotary switch would be perfect for selecting one LED at a time, however I am looking for a low profile solution, and also something that can be used with one hand while attached to a small light weight device.
It seems like there should be an IC for this, but I don't have much experience with them and don't know what this functionality is called. Any advice is appreciated.
Edit: I'll also mention that I'm looking for a solution under $50 and that uses parts that I can source locally (both possible solutions mentioned above meet these requirements so I'm not very flexible on this).