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TTL and CMOS circuits is the basic digital circuits, and also constitute the basis of the digital system. TTL circuits, limit operating voltage is 7V, …

A cute chick was born.Chicks do not know that behind him a snake already eyeing her.Most of the time I can eat a length of 50. Snake eat a chicken bod …

IC package, but the package of the future will be smaller and smaller, thinner and thinner.Early package to DIP later to SOP, TSOP, TSSOP, QFN, TQFP p …

TTL and CMOS circuits is the basic digital circuits, and also constitute the basis of the digital system. TTL circuits, limit operating voltage is 7V …

Very fun puzzle game, you control a little mouse looking for food, escape map on cats, dogs and other dangerous things. This is an intellectual game.M …