Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
i am making a visual zone alarm (led's come on when ever a door or window opens) for my house and i want to hook it up so it makes 1 beep or chirp whenever one of the lights come on. any help would be great.