Hi,Boncuk, Search for Primo PDF, & DOWNLOAD THE FREE TRIAL version,I was so impressed with it,I subscribed to the full version.The system installs as a printer,in your printers & faxes folder,and when you press print,it gives you option to select it;1st create printable files (keep them in a seperate folder to find easy) press print,& primo will give you the choice which files to "merge together)you should not have any problems uploading the PDF,If you have trouble uploading BIG files,try "Yousendit Express" o.k. the IC for the PWM is LM324N,it's a 14 pin chip & very cheap to buy,
allways install it on a 14 pin socket.the Mosfets are of your choice,just go for a high power N Channel version. the PDF I've posted is one of my early attempts,now I've seen it again,I will create a better one: good luck;