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.
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.
Allows for a variety of mains transformers for different world voltages. Buy who uses modems anymore? Most mains supplies these days are switching, and allow for a range of input voltages and line frequencies.
Usually they do this so that they can use a smaller wall-wart for a given power output. Also, by putting the filter caps and the rectifier inside the modem, you can easily have both positive and negative supplies while using a standard 2 wire plug.
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