USB selector switch

  
To share a regional press like the USB printer, scanner etc. two computers, it is relatively easy. Just connect the two computers on a network device and say the printer as shared. This method however requires the continued operation of the computer we plugged the printer. Solution to above problem is to give the circuit that we present, and has the potential to be transferred to the printer on whichever computer we want, because the printer is connected to one of two computers, but in construction.
USB selector switch - schematic

With lower prices on laptop computers became affordable sailer acquisition and the average Greek. Getting two computers, however, automatically generated and the need to link them with the most common peripherals already available, such as a printer, a scanner, the WEB camera, the ISDN NetMod and others. To select the type of interface with computer peripheral into account that we have the most modern peripherals are interconnected USB, leading us to this choice. As a USB peripheral to mention USB printer. The position may well be a scanner, a camera or other USB device preferably low-speed USB 1.1 (1.5 Mbps), this does not mean it can not work with devices and USB 2.0. Since we manufacture include mechanical parts, perhaps create problems in some regional communication through the floor construction, because of both high speed as this USB 2.0 (480 Mbps) and "noise" generated in the contacts of the relay. According to the block diagram in Figure 1, the printer is connected to computer # 1 and the No. 2 microprocessor computer. When given the mandate by the software construction (USBswitch. exe), is the cross-switching devices and the printer is now No. 2 on the computer and the microcontroller to the computer # 1. The theoretical circuit The circuit consists of a few parts of the microcontroller IC 1 to take control of where it is attached printer, and is responsible for communicating with software the computer through...



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