1. Schematics All circuits need –Schematic –Parts list –Layout diagram –Circuit description

5. This is a schematic Layout on schematic does not equal layout on board Communicates interconnections and function

6. These are not schematics

7. Common Symbols Scherz, Practical Electronics for Inventors (2000)

8. Hints for Schematics Use computer, or draw freehand with graph paper underlay Draw components first, then make connections Space components, no crowding Label all parts Signals flow left-to-right Look in books for examples Align wires horizontally or vertically All wires are straight lines All lettering block caps Include a title block Supplement with a bill of materials

9. Dos and Don’ts NO YES Grounds point down Avoid crowding Labels and values

11. Freeware computer packages Circuitlab.com (super easy!) www.expresspcb.com Eagle Light, www.cadsoft.de

12. ExpressPCB Demo