Power from PC parallel port


Posted on Aug 4, 2012

PC parallel port was never designed to provide any output power to divices connected to it. it was only designed for connecting printer to your PC. But in this weird PC business everything changes. Suddenly the parallel port have become a port where you can connect very wide selection of devices like software protection dongles, removable disks, modems, network adapters, printer sharing units, parallel port extenders, soundcards, electronic telecard readers and many homebuilt circuits.



Most of those external circuit have their own power supplies. You can consider external power supply with some devices not very useful because that transformer is usually bigger than the device itself and you have yet another transformer wint it`s wi




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