Between two computers commutator to be used with the printer will activate able which channel is active with LEDs can be seen loop supply does not require the LEDs USB Poarta chi 5Volt works with circuit 1/1 can be printed as PDFs formay the PCB drawing there
USB Printer Sharing Switch
The most common way to a USB printer between two PCs is to use a machine to print server. However, this is not always convenient, because it means that the server PC must always be on, if you want to print something.
Source: http://www.siliconchip.com.au/cms/A_111242/article.html
USB Printer Sharing Switch Circuit pcb schematic alternative link
USB Printer Sharing Switch Circuit ZIP File Password: 320volt.com
Solid State Tesla Coil Project TL494 PWM High-Voltage
TL494 PWM control integrated with the high-voltage applications drive on the floor STW20NB50 MOSFETs used transformer windings information oscilloscope measurements details given me and most of us practice a project that known output transformer is very expensive but the MOSFETs and driver section quite strong other SMPS applications can be useful or less can give you ideas