Dongle switch

Software suppliers have adopted a number of different systems to protect their products against illegal copying. The dongle (also written as 'dongal') is a user-friendly solution which acts a kind of 'key' plugged on to the printer port connector, sitting between the PC and the printer. In some cases, a printer connected like that but otherwise switched off may cause strange effects inside the dongle. Disconnecting the printer or switching it on then appears to be the only alternative to keep the software going. The dongle switch presented here solves the same problem quickly, automatically, and in a much more elegant way.