Eagle简易教程

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1、AtasteofEagleCADSDP‘06MattBrennanNote:thiswillbebestviewedinslide-showmodemattb@ieee.org30March2006Terms•Footprint:whatapartlookslikeontheboard•Airwire:alineinthelayoutindicatingaconnectionneedingtobemade•Silkscreen:notationonPCB(noconnection)•Net:connectionsbetweenagroupofpinsControlPanelr-clic

2、knewprojectr-clicknew->schematicMakingapart•Symbol+Footprint=Device•DevicesgointoschematicCreate/EditDevice,Footprint,SymbolCommandbarNameLayerPinsSymbolLayerValueLayerIncommandbar:copyso08@40xxso08ConnectdeviceAddsymboltodeviceMakenewpackage,ConnectsymbolpinsChoosefootprinttofootprintpadsSaveli

3、brary,and“use”itthroughcontrolpanelIfyoudecidetomakeyourownfootprint:•Remembertomarkpin1onsomethingthatwillbeprinted•Put>NAMEand>VALUEontherespectivelayers•Printthefootprintinactualsize,lineuptheparttomakesureyougotitrightSchematicEditorToolbarAddpartName:itworksonwires,tooSmash:movepiecesofpart

4、Designrulecheck:DOITLabel:wires,againSomeusefullibraries•rcl–resistors,caps,inductors•con-lstb,con-lsta–standardconnectors•con-subd–DB-#connectors•con-coax–SMA,etc•linear–op-amps•solpad–extraneousconnectionsLayout•Red:top•Blue:bottom•Green:through-hole•White:dimensions&silkscreen•Canadjustdimens

5、ionsw/MoveLayoutToolbarRouteUn-RouteRatsnest–redrawairwiresAutoRoute–notallit’scrackeduptobeDRC–Set&Checkclearances/layersDRC-LayersSetup:(1*16)Setup:(1*2+15*16)TwoLayersFourLayersDRC-Clearances•Specifiedbyboardhouse•Larger=>Cheaper•6/6issmall,upto10/10+•Careful:someSMTpackagesrequiresmallcleara

6、nces!Alsocheck:minimumdrillsize.12.5issafeGridNormalsnapSnapwhileholding‘alt’AlsosetgridinAutorouteoptions:smallergridgivesroutermoreflexibility,buttakeslongertorouteRouting•High-currenttracesshouldbeWIDE=>lessresistance=>lessvoltagedrop•Routepower&groundfirst,“byhand”•EspeciallyifyouareusingSMD

7、parts,READthelayoutsectionofthedatasheet–Anecdotal:DC-DCconverterscanfryiftheirpassivecomponentsaretoofaraway,ortracesaretoosmallCAMProcessorAirwires(NOTconnectedyet)Topwires(red)Polygontool•Forlargecopperareas.Drawpolygon,n