Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
@KlausST and betwixt: I don't follow the suggestion about LEDs being multiplexed, but the idea about using an LDR makes sense to me. Possibly it could be shielded from ambient light by positioning a dark-walled hollow tube over it so you could aim the device directly at the button.
Answers to...
A friend who has lost his sight wants to be able to record music using a digital mixer that has buttons with small LED lights that indicate when the functions controlled by the buttons are active. I would like to make him a small handheld device that would emit an audible signal when some kind...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
