Sorry, miro, I certainly didn't mean to be insulting or offensive. I just figured that Faisal_saf dropped the link and I wanted to know what site he had found helpful. Nostrafus had already provided a huge link list, and I simply didn't have a better one to suggest. I thought the winks clarified that my little poke was meant to be absolutely friendly.
I google up links when I need references to a specific circuit design, but I don't have (anymore) good link sites for general circuit ideas. I appreciate the many references that all the members here have contributed to this thread that you started, and have bookmarked most of them. Take care, my friend, and good luck in all your endeavours.