If you’re an automotive enthusiast of taste, you can’t stand the idea of fitting a janky aftermarket stereo into your nice, clean ride. Flashy, modern head units can spoil the look of a car’s interior ...

This project illustrates a LAN using a web browser to control an Arduino-based stereo audio switch. In the design, a 5V DPDT relay is used along with an Ethernet-capable Arduino and a few 3.5mm stereo ...

As you can see in the schematic the 12V battery (or use other voltages) is connected with the plus at terminal T1 and minus at terminal T2. The contact 1 and 4 are connected together as 2 and 3 are ...