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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

footprint in protel 99

footprint usually refers to the package size..
the package size of a 7805 is usually a TO-220 ..
a TO-220 is a standard three terminal power transistor size ( with a tab)..
 

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