Electronics and Computer Systems Engineering
DESIGNSPARK GUIDE
TUTORIAL 1 – SCHEMATIC DESIGN
THIS IS A BEGINNER’S GUIDE TO PCB DESIGN USING DESIGNSPARK PCB AND IS GEARED TOWARDS THE FOLLOWING INDIVIDUALS:
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POSSESS AMPLE THEORETICAL ELECTRONICS KNOWLEDGE
HAS LITTLE OR NO PCB DESIGN EXPERIENCE
HAS LITTLE OR NO DESIGNSPARK EXPERIENCE
DESIGN SPARK IS A PCB DESIGN PROGRAM PROVIDED FREE OF CHARGE BY RS COMPONENTS.
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DOWNLOAD IS AVAILABLE FROM
– HTTP://WWW.DESIGNSPARK.COM/PCB
DOWNLOAD THE FILE (SIZE 60.3MB)
CREATE AN ACCOUNT
INSTALL
THEN ACTIVATE YOUR INSTALLATION
DESIGNSPARK PCB
CURRENT VERSION IS V4.0 (RELEASED THIS WEEK, WE ARE STILL RUNNING 3.0 IN THIS LAB).
NOTE: THIS TUTORIAL SHOULD WORK WITH VER3 OR VER4, SO FEEL FREE TO INSTALL THE LATEST AT HOME ON YOUR OWN PC,
PLEASE DON’T INSTALL VER4 ON A CLASSROOM PC AS LICENCING/ACTIVATION WORKS DIFFERENTLY ON CAMPUS. WE WILL LIKELY
UPDATE TO VER4 DURING THE TERM.
DESIGNSPARK PCB IS A FREE PROFESSIONAL PCB DESIGN SOFTWARE, ENABLING ELECTRONIC DESIGN ENGINEERS TO TAKE THEIR
DESIGNS FROM CONCEPT TO PRODUCTION.
KEY FEATURES:
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USE SPICE SIMULATION TO EXPORT YOUR NETLISTS TO SEVERAL POPULAR SIMULATION TOOLS INCLUDING LTSPICE AND
TINA
CALCULATE IMPEDANCE, CAPACITANCE AND HEAT DISSIPATION WITH THE DESIGN CALCULATOR
GROUP MULTIPLE ITEMS IN YOUR DESIGN SO THAT THEY ACT AS ONE ‘UNIT’ WITH THE GROUP FUNCTION
VIEW YOUR PCB LAYOUT WITH THE 3D VIEWER
SUPPORT UNLIMITED PCB LAYERS AND UNLIMITED SHEETS PER PROJECT
NO LICENSE RESTRICTIONS OR TIME LIMIT ON LICENSE
GENERATES INDUSTRY STANDARD GERBER FILES, EXCELLON, DXF, IDF AND MORE
SYSTEM REQUIREMENTS:
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WINDOWS XP OR LATER
1 GHZ OR FASTER PENTIUM CLASS PROCESSOR OR BETTER
256 MBYTE RAM
100 MBYTE HARD DISK SPACE (INSTALL + USER FILES)
SCROLL WHEEL MOUSE RECOMMENDED
ADOBE® READER® 8 OR ABOVE
INTERNET CONNECTION TO RECEIVE UPDATES AND ONLINE TECHNICAL SUPPORT
INSTALLATION:
 DESIGNSPARK PCB IS FREE TO DOWNLOAD AND INSTALL.
 ONCE INSTALLED YOU WILL NEED TO ACTIVATE IT TO ENABLE THE ABILITY TO SAVE YOUR WORK.
 ACTIVATION IS FREE HOWEVER YOU WILL ALSO NEED TO CREATE A FREE ACCOUNT ON THE DESIGNSPARK WEBSITE
HTTP://WWW.DESIGNSPARK.COM
 IF YOU INSTALL DESIGNSPARK ON MORE THAN ONE COMPUTER YOU WILL NEED A SEPARATE ACTIVATION FOR EACH PC.
 SORRY BUT DESIGNSPARK IS WINDOWS ONLY, NO MAC OR LINUX VERSIONS ARE AVAILABLE.
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GETTING STARTED
START THE SOFTWARE BY CLICKING
START
ALL PROGRAMS
DESIGNSPARK
DESIGNSPARK PCB
THE DESIGNSPARK DESKTOP
WHEN YOU RUN DESIGNSPARK, THE MAIN APPLICATION WINDOW APPEARS. YOU CAN OPEN ANY NUMBER AND COMBINATION OF
DIFFERENT DESIGNS AND LIBRARY ITEMS TOGETHER IN THIS.
THE PICTURE BELOW SHOWS YOU THE MAJOR FRAMEWORK FACETS BY NAME SO THAT AS THEY ARE USED IN THIS
TUTORIAL YOU WILL UNDERSTAND WHAT IS BEING TALKED ABOUT.
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TOOLBARS
DESIGNSPARK IS INSTALLED WITH A SET OF COMMONLY USED TOOLS ON THE TOOLBARS FOR YOU TO USE.
GENERAL TOOLBAR
SCHEMATIC DESIGN TOOLBAR
PCB DESIGN TOOLBAR
IF YOU HOVER THE MOUSE OVER THE TOOLBAR BUTTONS A
SMALL TOOLTIP IS DISPLAYED SHOWING THE BUTTON FUNCTION
AND ITS KEYBOARD SHORTCUT IF ONE IS DEFINED.
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CANCELLING COMMANDS
ALL DIALOGS AND COMMANDS CAN BE CANCELLED AT ANY TIME BY CLICKING THE <ESC> KEY ON THE KEYBOARD.
SOMETIMES THIS WILL NEED TO BE CLICKED A COUPLE OF TIMES IF YOU ARE ‘DOWN’ IN A SUB-MENU OR LOWER LEVEL OPTION.
SHORTCUT KEYS
AS WELL AS THE TOOLBARS, DESIGNSPARK HAS THE ABILITY FOR YOU TO PROGRAM
YOUR KEYBOARD FOR COMMONLY USED OPTIONS OR COMMANDS. THIS MEANS
THAT ONCE PROGRAMMED, YOU CAN PRESS A KEY OR KEY COMBINATION TO ENTER A
FUNCTION OR OPTION. FOR EXPERIENCED USERS, THIS MAKES THE PROGRAM'S
OPERATION FAR MORE EFFICIENT.
WHEN DESIGNSPARK IS INSTALLED, YOU WILL FIND A SET OF SHORTCUTS DEFINED
FOR YOU. A FULL REPORT OF ALL THE ASSIGNED KEYS CAN BE OBTAINED FROM THE
HELP MENU AND SHORTCUT KEYS… OPTION.
A DIALOG IS DISPLAYED TO ALLOW YOU TO CHOOSE HOW THE SHORTCUT KEYS ARE
REPORTED.
UNITS:
THE UNITS OPTION ON THE SETTINGS MENU IS USED TO DEFINE THE UNITS
AND THE PRECISION AT WHICH THE CO-ORDINATES AND LENGTHS
DISPLAYED IN THE DIALOGS AND EDITED BY YOU ARE DISPLAYED. THE BASIC
WORKING UNITS CAN BE CHANGED USING THE UNITS: DROP DOWN LIST.
FOR EACH TYPE OF UNITS, YOU CAN SPECIFY A PRECISION:. THIS IS THE
NUMBER OF DECIMAL PLACES DISPLAYED; THE VALUE IS SIMPLY ROUNDED
TO THE NEAREST LAST DIGIT.
GRIDS:
GRIDS ARE USED IN DESIGNSPARK FOR DEFINING THE POINTS OR STEPS
THAT ITEMS WILL SNAP TO WHEN THEY ARE PLACED AND FOR VISIBLE
REFERENCES IN THE DESIGN. FOR THIS, THE GRIDS DIALOG ON THE
SETTINGS MENU
CONTAINS TWO SETS OF GRID TYPES: WORKING GRID AND SCREEN GRID.
THE WORKING GRID PAGE WILL ALLOW YOU TO DEFINE THE GRID USED
FOR PLACEMENT OF DESIGN ITEMS DURING MANUAL INTERACTION. THE
WORKING GRID IS NOT VISIBLE BUT THE SCREEN GRID (WHICH IS VISIBLE)
CAN BE THE SAME VALUE, HENCE MAKING IT APPEAR TO BE VISIBLE.
THE SCREEN GRID PAGE IS USED TO DEFINE THE DISPLAY OF 'DOTS' TO
GUIDE YOU WHILE DESIGNING. SIZE STEPS:
IS USED TO DEFINE THE ‘PITCH’ OF THE GRID AND USES THE SECONDARY
COLOUR TO DISPLAY THEM. THE PRIMARY
COLOUR IS USED TO DISPLAY ANOTHER GRID BASED ON A 10 TIMES LARGER
SIZE THAN THE SECONDARY GRID.
THE VISIBLE CHECK BOX ENABLES THE GRIDS TO BE DISPLAYED ON OR OFF,
THIS CAN BE SET AT ANY TIME IN
THE DESIGN USING THE SHORTCUT KEY <G>.
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SNAPPING TO GRID
THE SNAP MODE SHORTCUT CAN BE DISPLAYED DURING EDITING BY SELECTING THE DIRECT
KEYBOARD COMMAND <CTRL-G>. BY SELECTING THE SNAP MODE SETTING YOU CAN USE
PREDEFINED MULTIPLES OF THE WORKING GRID TO MOVE ITEMS FOR EXAMPLE.
SHORTCUT MENUS
THE RIGHT HAND MOUSE BUTTON CAN BE USED EXTENSIVELY THROUGHOUT DESIGNSPARK TO DISPLAY SHORTCUT MENUS, THESE
ARE ALSO KNOWN AS CONTEXT MENUS. THESE MENUS CAN BE ACCESSED DURING AN OPERATION AND CONTAIN A SET OF
RELEVANT 'CONTEXT' COMMANDS.
ONCE FAMILIAR WITH THE SYSTEM, YOU CAN ACCESS THE SHORTCUT MENUS BY RIGHT CLICKING DIRECTLY ON THE ITEM AND
PICKING THE OPTION FROM THE MENU.
UNDO/REDO:
DESIGNSPARK CONTAINS UNLIMITED MULTI-LEVEL UNDO AND REDO CAPABILITIES FOR USE THROUGH THE PRODUCT.
UNDO CAN BE USED TO REVERSE THE LAST OPERATIONS THAT HAVE BEEN COMPLETED. UNDO CAN BE USED
SEQUENTIALLY TO UNDO MORE THAN ONE OPERATION. IT CAN ALSO BE A USEFUL AND FLEXIBLE TOOL TO INTERACTIVELY
TRY DIFFERENT ITERATIONS OF AN OPERATION, MANUAL COMPONENT PLACEMENT FOR EXAMPLE.
UNDO AND REDO ARE INVOKED USING THE STANDARD WINDOWS SHORTCUT KEYS <CTRL-Z> (AND ALT-BACKSPACE)
AND <CTRL-Y> RESPECTIVELY. THESE ARE ALSO AVAILABLE ON THE EDIT TOOLBAR AS BUTTONS. REDO IS ONLY
AVAILABLE ONCE AN UNDO HAS BEEN PERFORMED, UNTIL THEN, IT REMAINS ON THE MENU BUT IS GREYED OUT AS
UNAVAILABLE. THE NUMBER OF UNDO LEVELS CAN BE SET IN THE PREFERENCES DIALOG.
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PROPERTIES OF ITEMS:
EACH ITEM IN THE DESIGN CONTAINS A SET OF CHARACTERISTICS WHICH CAN BE VIEWED OR EDITED USING THE
PROPERTIES OPTION. SOME ITEMS WITHIN THE DESIGN ARE MADE UP OF SEVERAL ENTITIES, EACH OF WHICH IS
INDIVIDUALLY SELECTABLE AND HAS ITS OWN PROPERTIES THAT CAN BE VIEWED.
ITEM PROPERTIES CAN BE VIEWED BY SELECTING THE ITEM AND
CLICKING ON THE PROPERTIES OPTION FROM THE SHORTCUT MENU. IT
IS QUICKER THOUGH TO SELECT THE ITEM AND CLICK THE SHORTCUT
KEY <ALT-ENTER>.
THE EXAMPLE LEFT SHOWS THE COMPONENT PAGE PROPERTIES OF A
PCB COMPONENT PAD. YOU’LL NOTICE THAT OTHER PROPERTIES OF
THE COMPONENT ARE AVAILABLE, SUCH AS COMPONENT AND
COMPONENT VALUES.
STATUS BAR:
THE STATUS BAR AT THE BOTTOM OF THE DESIGN WINDOW DISPLAYS USEFUL INFORMATION ABOUT THE DESIGN ITEM
SELECTED. MORE DETAILED INFORMATION IS ALSO AVAILABLE BY SELECTING THE ITEM AND USING THE PROPERTIES
DIALOG FROM THE SHORTCUT MENU.
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DOCKABLE WINDOWS AND BROWSERS:
AS PART OF THE DESIGN TOOLSET, YOU HAVE A NUMBER OF BROWSERS AVAILABLE THROUGH THE INTERACTION BAR.
THE INTERACTION BAR IS AVAILABLE THROUGH THE VIEW MENU AND
INTERACTION BAR <F9> OR BY RIGHT CLICKING THE MOUSE OVER ONE
OF THE TOOLBARS OR MENU BAR AND SELECTING IT FROM THE
SHORTCUT MENU.
EACH INDIVIDUAL BROWSER CAN BE OPENED BY SELECTING ONE OF THE
THREE TABS AT THE BOTTOM EDGE OF THE BROWSER. YOU CAN ACCESS
LAYERS (IN PCB ONLY), COMPONENT BIN (IN SCHEMATICS ONLY),
GOTO AND ADD COMPONENT OPTIONS.
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SCHEMATIC DESIGN TUTORIAL:
DURING THE TUTORIAL WE WILL CREATE A SCHEMATIC DESIGN; THIS IS SIMILAR TO HOW IT SHOULD LOOK WHEN
FINISHED (THIS IS FROM A DIFFERENT SOFTWARE PACKAGE SO IT DOES APPEAR QUITE DIFFERENT).
THIS TUTORIAL WILL WALK YOU THROUGH ALL THE ASPECTS OF DRAWING THIS AND ADDING THE DETAIL AS YOU GO.
THE DESIGN CONSISTS OF THREE PARTS;
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THE FIRST IS THE MICRO-CONTROLLER CIRCUIT AT THE TOP.
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BELOW THAT WE HAVE THE USB CONNECTION CIRCUIT.
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AND TO THE RIGHT THE OUTPUT LED CIRCUIT.
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STARTING A NEW SCHEMATIC
> TO START A NEW SCHEMATIC DESIGN OR A PCB DESIGN
FROM THE FILE MENU, CLICK NEW (SHORTCUT KEY <CTRL-N>)
CHECK THE SCHEMATIC DESIGN BUTTON AND THE USE TECHNOLOGY FILE BUTTON. THE DEFAULT.STF TEMPLATE WILL
HELP YOU GET STARTED QUICKER, SELECT THIS FILE. MORE DETAIL ABOUT TECHNOLOGY FILES IS AVAILABLE IN THE
ONLINE HELP.
CLICK THE OK BUTTON TO START A NEW SCHEMATIC DESIGN.
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YOUR DESIGNSPARK WINDOW WILL LOOK LIKE THIS READY TO START:
ADDING COMPONENTS:
> TO ADD A COMPONENT
THERE ARE TWO METHODS FOR ADDING COMPONENTS; WE WILL USE THE INTERACTION
BAR TO START WITH, YOU CAN ALSO USE THE ADD COMPONENT OPTION AS WELL.
THE INTERACTION BAR HAS AUTOMATICALLY BEEN STARTED WHEN CREATING A NEW
SCHEMATIC DESIGN. IF IT HASN’T, CLICK THE <F9> SHORTCUT KEY TO DISPLAY IT.
SELECT THE ADD COMPONENT BROWSER TAB AT THE BOTTOM OF THE INTERACTION
BAR.
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FROM THE LIST OF AVAILABLE LIBRARIES, SELECT THE RESISTOR.CML LIBRARY.
CLICK ON THE SMALL DOWN ARROW TO REVEAL THE DROP DOWN LIST AND THEN
MAKE THE SELECTION.
THE COMPONENT LIST WILL BE POPULATED WITH COMPONENTS. SELECTING THIS
LIBRARY WILL AUTOMATICALLY SELECT THE FIRST COMPONENT IN THE LIST AS
WELL.
THE FIRST IN THE LIST IS A 7 RESISTOR NETWORK COMPONENT.
SCROLL DOWN THE LIST OF COMPONENTS USING THE VERTICAL SCROLL BAR.
YOU CAN ALSO CLICK IN THIS LIST AND TYPE THE FIRST AND SUBSEQUENT LETTERS
AND NUMBERS OF THE ITEM REQUIRED.
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KEEP SCROLLING DOWN UNTIL YOU CAN SELECT THE COMPONENT R 0.1W SMTF 10K.
THIS IS A 10KΩ 0805 SURFACE MOUNT RESISTOR WE NEED 3 OF THESE.
A PREVIEW OF BOTH THE SCHEMATIC AND PCB SYMBOLS WILL BE DISPLAYED (THE PCB
SYMBOL IS TOP MOST IN THE PREVIEW).
ONCE YOU HAVE THE CORRECT COMPONENT, YOU CAN ADD IT BY SELECTING THE
SYMBOL PREVIEW AND DRAGGING IT INTO THE DESIGN. YOU CAN ALSO ADD THE
COMPONENT BY SELECTING AND DRAGGING ITS NAME.
THIS IS A ONE-SHOT PROCESS. IF YOU WISH TO ADD MORE OF THE SAME TYPE, DRAG
ANOTHER FROM THE BIN. THE COMPONENT IS CURRENTLY ON THE END OF YOUR
CURSOR. TO PLACE IT IN THE DESIGN, CLICK THE LEFT MOUSE BUTTON ONCE.
YOU NEED 15 RESISTORS IN TOTAL FOR THE FINAL CIRCUIT, 3 OF WHICH ARE 10KΩ.
NOTICE FULL NAME/DESCRIPTION OF THE DEVICE IS SHOWN ALONG WITH THE VALUE. WE CAN CHANGE THAT BY
DOUBLE CLICKING ON THE DEVICE.
UNSELECT THE COMPONENT,
PIN NAMES AND PIN NUMBER
BOXES.
SELECT THE VALUES TAB AND
CLICK IN THE VALUE BOX.
CLICK <OK>
YOU SHOULD NOW HAVE R1, A 10KΩ RESISTOR WITHOUT ALL THE EXTRA TEXT.
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YOU NEED 2 MORE 10KΩ RESISTORS ALSO 0803 PACKAGE.
CLICK TO SELECT R1, PRESS THE <CTRL-C> KEYS ON YOUR KEYBOARD AT THE SAME TIME TO COPY THE RESISTOR R1.
NOW PRESS <CTRL-V> TO PASTE A COPY OF THE RESISTOR INTO THE DESIGN.
YOU WILL SEE THAT AN IDENTICAL COPY OF R1 HAS BEEN MADE AND IS NAMED R2. REPEAT THIS TO PLACE R3.
NOTE# THESE ARE STANDARD WINDOWS COMMANDS.
YOU SHOULD NOW HAVE 3 RESISTORS ON YOUR SHEET. WE NEED 12 MORE, ALL ARE 0805 RESISTORS THE VALUES
REQUIRED ARE 2 X 27Ω AND 10 X 330Ω.
FIND THESE IN THE LIBRARY AND PLACE ONTO THE SHEET, USING THE METHODS ABOVE (COPY PASTE ETC. WHEN MORE
THAN ONE IS NEEDED).
YOU SHOULD NOW HAVE A GROUP OF 15 RESISTORS ON YOUR SHEET.
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NEXT WE NEED 1 X 0.01μF (OR 10nF) AND 7 X 0.1μF
(OR 100nF) 0603 CAPACITORS.
FIND THE CAPACITOR.CML LIBRARY.
AT THE TOP OF THE LIBRARY SHOULD BE A DEVICE WITH
A NAME OF 0603YC104KATDA.
0603 BEING THE FOOTPRINT NAME AND 104 BEING
THE VALUE. 10 AND 4 MORE ZEROS IN PICO FARAD.
100,000pF OR 100nF OR 0.1μF
PLACE ONE OF THESE ON YOUR SHEET AND THEN
DOUBLE CLICK IT TO EDIT THE DISPLAYED NAME AND
VALUE.
DESELECT THE COMPONENT BOX, THEN CLICK THE
VALUES TAB.
NOTICE THAT UNLIKE THE RESISTOR WE DON’T HAVE A VALUE WE CAN SELECT TO DISPLAY; WE NEED TO CLICK ON THE
ADD BUTTON TO BRING UP THE VALUE DIALOG (WELL IF YOU LOOK LONG AND HARD ENOUGH YOU DO, BUT THIS WAY IS
EASIER).
CLICK ON THE DROP DOWN ARROW THEN SELECT VALUE.
TYPE THE REQUIRED VALUE OF 10nF INTO THE VALUE BOX AND CLICK
OK.
MAKE SURE YOU CLICK IN THE VALUE CHECKBOX AND THEN CLICK OK.
YOU SHOULD END UP WITH A SCHEMATIC COMPONENT THAT LOOKS
LIKE THE IMAGE BELOW AT RIGHT.
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REPEAT THE PROCESS TO CREATE A 0.1μF VERSION OF THE
SAME PART, PLACE IT THEN COPY AND PASTE 6 MORE OF
THESE ONTO THE SHEET.
YOU SHOULD NOW HAVE 1 X 10nF AND 7 X 0.1μF 0603
CAPACITORS AS BELOW.
THIS LEAVES US WITH 1 MORE CAPACITOR, A 4.7μF POLARISED TANTALUM WITH A 1206 FOOTPRINT.
WE NEED ANOTHER LIBRARY INSTALLED FOR THIS, SO WE WILL COME BACK TO THIS SOON.
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>TO PAN & ZOOM IN THE DESIGN:
TO VIEW THE RESISTORS CLOSER, ROLL THE MOUSE WHEEL BUTTON FORWARD TO ZOOM IN. IF YOU ZOOM IN TOO FAST
(AND TOO FAR), ROLL THE MOUSE WHEEL BUTTON BACKWARDS (SLOWLY). IF YOU ZOOM TOO FAR EITHER WAY, PRESS
<A> ON THE KEYBOARD TO VIEW ALL AND THEN ZOOM IN OR OUT AGAIN. SHORTCUT KEYS ARE ALSO AVAILABLE FOR
ZOOM IN <Z> AND ZOOM OUT <U>.
YOU CAN ZOOM WHILE THE COMPONENT IS ACTIVE ON THE END OF YOUR CURSOR.
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SCROLL WHEEL RECOMMENDED
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WHEEL ROLLED BACKWARDS = ZOOM OUT
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WHEEL PRESSED DOWN AND RELEASED = SINGLE PAN
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WHEEL ROLLED FORWARDS = ZOOM IN
ZOOM OUT TO GIVE YOURSELF SPACE AROUND THE RESISTORS IN WHICH TO PLACE MORE COMPONENTS.
>TO SWITCH OFF THE DISPLAYED GRID:
IF YOU DON’T WANT TO SEE THE DISPLAYED GRID DOTS, YOU CAN TURN THEM OFF. CLICK <G> TO TOGGLE THE GRID
OFF. PRESS THIS KEY AGAIN WILL SWITCH IT BACK ON AT ANY TIME.
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>TO ADD THE LED’S:
HEREIN LIES ONE MAJOR ISSUE WITH EVERY PCB DESIGN PACKAGE, “NOT ALL PARTS ARE IN THE STANDARD LIBRARIES”.
THE DESIGN CALLS FOR 10 SMT LED’S WITH 0603 FOOTPRINTS. IF YOU LOOK AT THE STANDARD LIBRARIES YOU WILL
FIND BOTH A 3 AND A 5MM PTH LED BUT NO SMT LED’S. IF HOWEVER YOU HAVE A LIBRARY NAMED “SPARKFUN
DESIGNSPARK LIB.CML” THEN YOU WILL HAVE SEVERAL LED FOOTPRINTS AVAILABLE TO YOU (“SPARKFUN IS AN ONLINE
RETAIL STORE THAT SELLS THE BITS AND PIECES TO MAKE YOUR ELECTRONICS PROJECTS POSSIBLE”).
IF YOU HAVE NEVER VISITED THE SPARKFUN WEBSITE, GO ON AND CHECK IT OUT www.sparkfun.com
IF YOUR COPY OF DESIGNSPARK IS MISSING THE SPARKFUN LIBRARIES, YOU CAN GRAD A COPY FROM THE NETWORK
STUDENT L: DRIVE
L:\Electronics\H081 Design PCBs\DesignSpark\Libraries\Sparkfun
OR FOLLOW THIS LINK
https://www.dropbox.com/sh/uil55p5uq5b2fzs/oIZ5-mucw3
YOU WILL NEED ALL 6 FILES PLACED INTO THE LIBRARY FOLDER ON YOUR PC.
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“Libraries/Documents/DesignSpark PCB/Library” (Windows7),
“C:\Documents and Settings\All Users\Documents\DesignSpark PCB\Library” (Windows XP),
Sparkfun DesignSpark Lib.cml
Sparkfun DesignSpark Lib.psl
Sparkfun DesignSpark Lib.ssl
Sparkfun DesignSpark Lib.cmx
Sparkfun DesignSpark Lib.psx
Sparkfun DesignSpark Lib.ssx
THIS SHOULD COVER MOST OF THE COMPONENTS NEEDED TO FINISH THE TUTORIAL; HOWEVER WE WILL MAKE SOME
COMPONENTS FROM SCRATCH LATER ON TO USE IN BOTH THE ASSIGNMENT AND FINAL PROJECT.
SAVE YOUR WORK AT THIS AND RESTART THE PROGRAM, HAVING PLACED THE LIBRARIES INTO THE CORRECT FOLDER IT
USUALLY TAKES A RESTART BEFORE YOU CAN SEE THE NEW LIBRARIES.
>NOW WE CAN ADD THE LED’S:
CLICK THE ADD COMPONENT BUTTON ON THE
TOOLBAR, SHORTCUT KEY <F3>.
THE ADD COMPONENT DIALOG WILL DISPLAY [ALL
LIBRARIES] IN THE LIBRARY PATH. WE WILL USE THE
FIND OPTION TO LOCATE BOTH OF THESE COMPONENTS
IN THE LIBRARY.
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> TO SEARCH FOR COMPONENTS IN THE LIBRARY:
FROM THE ADD COMPONENT DIALOG, CLICK THE FIND
BUTTON.
FOR THE NAME SELECTION, CHOOSE CONTAINS FROM THE
DROP DOWN LIST. IN THE TEXT ENTRY, TYPE LED. THIS WILL BE
ENOUGH TO GET NEAR A NAME TO THEN MATCH WHAT WE
NEED.
IF WE WANTED TO NARROW DOWN THE SEARCH WE COULD
TYPE LED0603 INTO THE SEARCH FIELD.
THIS WOULD NARROW DOWN THE SEARCH, HOWEVER
SOMETIMES EXTRA DETAIL DOESN’T HELP THE SEARCH.
ONCE YOU FIND THE DEVICE YOU CAN CLICK THE ADD BUTTON
ON THE ADD COMPONENT DIALOG.
ONCE THE LED HAS BEEN PLACED ON THE SHEET YOU WILL
NOTICE IT ONCE AGAIN SHOWS TOO MUCH DETAIL IN THE
NAME.
ONCE AGAIN DOUBLE CLICK IT TO BRING UP THE PROPERTIES
AND UNTICK THE COMPONENT, PACKAGE, PIN NAMES AND PIN
NUMBERS CHECK BOXES. YOU SHOULD END UP WITH JUST THE
LED SYMBOL WITH THE DESIGNATOR LED1 BELOW IT.
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USE THE COPY PASTE AS WE DID BEFORE TO PLACE 9 MORE LED’S ON THE SHEET.
>ADD THE FINAL CAPACITOR
THE SPARKFUN LIBRARY ALSO HAS THE 4.7μF CAPACITOR WE NEED.
SCROLL DOWN TO FIND THE CAP_POL1206 COMPONENT, SELECT AND
PLACE ONTO THE SHEET.
ONCE AGAIN IT DOSEN’T DISPLAY AS WE WANT SO WE NEED TO CHANGE
IT.
DOUBLE CLICK TO EDIT, UNSELECT THE COMPONENT AND PACKAGE BOXES.
SELECT THE VALUES TAB, CLICK ON ADD, SELECT VALUE FROM THE DROP DOWN AND ENTER 4.7UF
INTO THE VALUE.
YOU WILL NOTICE THAT SELECTING THE VALUE CHECKBOX
DOSEN’T DISPLAY THE VALUE AS IT DID BEFORE.
THERE IS ONE MORE STEP WE NEED TO DO TO MAKE IT
DISPLAY.
DOUBLE CLICK ON THE DESIGNATOR TEXT C9 AND A SLILTLY DIFFERENT DIALOG BOX WILL DISPLAY,
THIS DIALOG HAS AN EXTRA TAB TO THE LEFT OF THE COMPONENT TAB LABLED TEXT. SELECT THIS
TAB AND CLICK IN THE VALUES BOX TO SELECT IT. THE VALUE WILL NOW DISPLAY.
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>ADD THE USB SOCKET (TYPE B PTH SOCKET)
USE THE SAME METHOD AS ABOVE FOR THE
LED BUT SEARCH FOR USBPTH (WE COULD JUST
SERACH FOR USB BUT THE LIST OF ITEMS FOUND
WOULD BE LONGER).
>THE REST OF THE PARTS
THIS LEAVES US WITH THE 2 X IC’S, 1 SWITCH AND 4 SETS OF HEADERPINS.
WE WILL PLACE THE 2 IC’S AND THEN GO ON TO PLACE THE SWITCH AND COVER THE HEADERPINS LAST.
NOTE# THE HEADERPINS ARE NOT IN THE STANDARD OR SPARKFUN LIBRARIES SO WE WILL NEED TO CREATE THEM
OURSELVES.
>ATMEGA8-16AC
http://www.atmel.com/Images/doc2486.pdf
ALTHOUGH WE WANT AN ATMEGA8-16AC IF YOU USE THE LIBRARY SEARCH AS WE DID
BEFORE YOU WILL ONLY FIND A ATMEGA8-8AC THE DIFFERENCE BETWEEN THEM IS THE
CLOCK SPEED IT RUNS AT. THE 8AC VERSION RUNS AT 8MHZ THE 16AC RUNS AT 16MHZ.
BASICALLY THE SAME COMPONENT AS FAR AS OUR CIRCUIT GOES SO THIS WILL WORK NICELY.
SELECT AND ADD TO YOUR SHEET.
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>NOTES:
THE INFORMATION BELOW IS FROM PAGE 285 OF THE CURRENT ATMEGA8 DATASHEET. FROM THIS YOU CAN SEE THAT
THE DIFFERENCE BETWEEN THE ATMEGA8-8 AND 8-16 IS THE CLOCK SPEED IN MHZ (WELL THERE IS ONE OTHER
DIFFERENCE AND THAT IS THE L FOR LOW POWER, THE 8-8 CAN RUN ON LOWER POWER).
OUR PROJECT CALLS FOR AN ATMEGA8-16 WITH A 32A (TQFP), FOOTPRINT. EITHER THE AU OR AUR WILL WORK
HOWEVER WHEN ORDERING PARTS LIKE THESE, THE AUR STANDS FOR TAPE AND REEL, WHICH REQUIRES ORDERING
SEVERAL THOUSAND AT A TIME, THE ATMEGA8-16AU CAN BE ORDERED IN SMALLER QUANTITIES.
>FT232RL
http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232R.pdf
USE THE LIBRARY SEARCH AS WE DID BEFORE AND SEARCH/FIND FOR A FT232RL,
THIS SHOULD FIND 2 VERSIONS IN THE SPARKFUN LIBRARY, EITHER WILL DO BUT
SELECT AND PLACE THE 2ND ONE OF THE 2.
>NOTES:
THE INFORMATION ON THE NEXT PAGE IS FROM PAGE 23 OF THE CURRENT FT232RL DATASHEET, YOU WILL NOTICE IT
GIVES US A SUGGESTED CIRCUIT CONFIGURATION, THIS IS PRETTY WELL HOW WE WILL LAY THIS SECTION OF THE CIRCUIT
OUT IN OUR SCHEMATIC. MOST COMPONENT MANUFACTURES SUPPLY THIS SORT OF INFORMATION FOR THERE DEVICES.
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>YOU SHOULD NOW HAVE SOMETHING LIKE THIS ON YOUR DRAWING SHEET.
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>FINAL PARTS
WE STILL NEED 1 SWITCH AND 2 CONNECTORS TO FINISH THIS OFF.
A 1 X 10PIN DIL (OR 5PINS X 2ROWS), AND 4 X 10PIN SIP HEADERS HEADER.
THESE SEEM HARDER TO FIND IN BOTH THE STANDARD AND SPARKFUN LIBRARIES HOWEVER THIS IS MAINLY DUE TO NOT
KNOWING WHAT TO SEARCH FOR.
THE ATMEGA8 IS PART OF THE ATMEL AVR MICRO CONTROLLER FAMILY, THERE IS A STANDARD IN CIRCUIT SPI
PROGRAMMING CONNECTION GENERALLY USED WITH THESE, WHICH IS 2 ROWS OF 5PINS.
SEARCH THE LIBRARIES FOR A NAME CONTAINING EITHER AVR OR SPI ONLY THIS TIME SELECT THE NUMBER OF PINS
CHECKBOX AND ENTER IN 10 AS THE NUMBER OF PINS.
NOTICE THIS FINDS 10 DIFFERENT VERSIONS OF THE SAME
DEVICE, IF YOU HIGHLIGHT ONE OF THE FOUND DEVICES AND
HAVE THE PREVIEW BOX TICKED ON THE ADD COMPONENT
DIALOG IT SHOWS BOTH THE FOOTPRINT AND SCHEMATIC
COMPONENT.
SELECT THE FIRST ONE FROM THE LIST AND ATTEMPT TO PLACE
IT ONTO THE SHEET.
YOU WILL LIKELY GET AN ERROR SAYING THAT IT HAS AN
INVALID COMPONENT NAME. CHANGE THE NAME TO SPI AND
PLACE IT ONTO THE SHEET.
AS BEFORE DOUBLE CLICK ON THE DEVICE AND TURN OF
ANY EXTRA TEXT WE DON’T NEED, YOU SHOULD END UP
WITH A COMPONENT SIMILAR TO BELOW.
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THE 10PIN SINGLE ROW HEADERS ARE MUCH HARDER TO FIND IN THE LIBRARIES. THE BEST I CAN FIND IS BELOW.
I WOULD LIKE TO CHANGE THIS IN 2 WAYS,
MOVE PINS 9 AND 10 FOR THE SCHEMATIC
TO THE OTHER SIDE AND SHORTEN THE
OUTLINE FOR THE FOOTPRINT (SEE SECOND
IMAGE AT RIGHT).
BOTH OF THESE CHANGES REQUIRE US TO
EDIT THE COMPONENTS.
NOTE: THE
CHANGES
FOLLOWING
METHOD
THE
COMPONENT
AND
FOOTPRINT FOR EVERYONE THAT USES THE
PC YOU ARE SITTING AT, THERE WILL BE
WAYS TO DO THIS WITHOUT IT BEING A
PERMANENT CHANGE, HOWEVER I AM STILL
TO FIND IT.
SEARCH THE LIBRARIES FOR A COMPONENT
OF WHICH THE NAME CONTAINS 66226,
AND HAS 10PINS.
PLACE/ADD ONE TO YOUR SHEET.
DOUBLE CLICK IT AND CHANGE THE NAME TO P1, UNSELECT THE COMPONENT DETAILS ETC.
RIGHT CLICK IT AND SELECT EDIT SYMBOL IN LIBRARY.
CTRL G AND CHANGE THE GRID TO 200THOU AND THE SNAP MODE TO QUARTER
GRID INSTEAD OF THE DEFAULT 25THOU AND GRID IT WAS SET TO, THIS WILL MAKE
IT EASY FOR US TO SPACE THE PINS NICELY TO MATCH THE ATMEGA DEVICE WHEN CONNECTING UP ON THE SCHEMATIC.
CLICK AND DRAG TO SELECT ALL OF THE ARROWS INSIDE THE COMPONENT AND THEN
DELETE THEM.
CLICK AND DRAG TO SELECT BOTH PINS 9 AND 10 INCLUDING THE NUMBERS, DRAG THESE
TO THE OTHER SIDE OF THE DEVICE, WHILE DRAGGING PRESS THE “F” KEY TO FLIP THEM,
JUST LEAVE THEM NEAR THE COMPONENT FOR NOW.
CLICK AWAY FROM THESE PINS TO DESELECT THEM.
CLICK AND DRAG THE S SYMBOL TO THE TOP OF THE SHAPE.
SELECT PIN1 AND DRAG IT UP NEAR THE TOP OF THE SHAPE.
SELECT PIN2 AND DRAG IT SO IT IS 4 GRIP SNAPS BELOW PIN 2, REPEAT WITH THE OTHER 6
PINS, THEN ARRANGE PINS 9 AND 10 AS PER THE IMAGE AT RIGHT.
RESIZE THE RECTANGLE TO FIT WITH THE NEW PIN PLACEMENTS, HOPEFULLY YOU END UP WITH AN IMAGE THAT LOOKS
LIKE THE ONE ABOVE RIGHT.
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FILE SAVE OR CTRL S TO SAVE IT.
RETURN TO YOU SCHEMATICS AND RIGHT CLICK ON THE SYMBOL BUT THIS TIME SELECT UPDATE COMPONENT.
CLICK OK > AND THEN PERFORM UPDATE, YOUR UPDATED COMPONENT SHOULD APPEAR ON THE SHEET.
NOW WE NEED TO EDIT THE FOOTPRINT.
Right click the component again and this time select edit component in
Library.
YOU SHOULD SEE AND WINDOW LIKE THE ONE BELOW, RIGHT CLICK ON THE PCB FOOTPRINT AND SELECT “EDIT PCB
SYMBOL”. THE PCB SYMBOL EDITOR WINDOW WILL OPEN AND YOU NEED TO EDIT IT BY SELECTING THE END LINES AND
MOVING THEM INWARDS.
BEFORE AND AFTER IMAGES ARE BELOW.
NOTE: YOU WILL ALSO NEED TO MOVE THE R MARKER WHICH POSITIONS THE DESIGNATOR AND THE ORANGE
OUTLINES ARE THERE TWICE.
SAVE, CLICK OK AND THEN YES
TO OVERWRITE.
IF YOU PRESS F3 OR CLICK THE
ADD COMPONENT ICON YOU WILL
SEE YOUR MODIFIED COMPONENT
IS NOW IN THE LIBRARY.
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DOUBLE CLICK TO GET TO THE PROPERTIES, DESELECT UNNEEDED TEXT AND CHANGE THE NAME TO P1, COPY AND
PASTE 3 MORE ONTO YOUR SHEET.
WE JUST NEED 1 MORE COMPONENT, THE SWITCH. THIS IS A MOMENTARY PTH SWITCH WITH 4 PINS SO IF YOU SEARCH
FOR A NAME THAT CONTAINS MOM AND HAS 4 TERMINALS YOU SHOULD FIND IT.
EITHER THE FIRST OR SECOND IS THE LIST WILL DO. PLACE ONE OF THESE ONTO THE SHEET.
>WE STILL HAVE ONE CHANGE TO MAKE.
IF YOU LOOK BACK AT THE SCHEMATIC WE ARE BASING THIS CIRCUIT ON, THE PIN LAYOUT FOR THE ATMEGA8 IS QUITE
DIFFERENT TO THE STANDARD COMPONENT IN THE LIBRARY.
TO MAKE IT EASIER TO CONNECT PINS TO PINS AND GENERALLY WIRE UP WE NEED TO REARRANGE SOME THINGS.
REMEMBER THE RULE ABOUT REARRANGING PINS?
RIGHT MOUSE CLICK AND EDIT SYMBOL IN LIBRARY.
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NOW YOU WILL NOTICE THAT THE PINS NUMBERS ALL DIFFERENT NOW AND WE NO LONGER HAVE PIN NAMES.
NOTICE THAT WHAT WAS PIN 1 IS NOW SHOWN AS PIN 28.
THIS IS DUE TO THE WAY DESIGNSPARK LETS YOU CREATE PARTS, WE WILL GO INTO THIS IN MORE DETAIL LATER.
WHAT WE NEED TO DO IS REARRANGE THE PINS TO BETTER MATCH THE SCHEMATIC WE ARE WORKING FROM, THIS WILL
ALSO HELP US AVOID 4WAY TIES AND CROSS OVERS.
TO HELP WITH THIS I HAVE PLACED AN IMAGE OF THE FINAL PIN LAYOUT ON THE NEXT PAGE, ARRANGE YOUR PINS TO
MATCH THEN, SAVE AND UPDATE YOUR SCHEMATIC COMPONENT TO MATCH.
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MAKE SURE YOU SET THE GRID
TO 200 THOU AND THE SNAP
MODE TO QUARTER GRID AS
YOU DID BEFORE.
AS LONG AS YOU SETUP THE PINS
TO MATCH THIS THE SCHEMATIC
SHOULD BE FAIRLY EASY TO PUT
TOGETHER.
EVEN IF YOU DON’T HAVE TO
MOVE ANY PINS, JUST GRAB AND
MOVE THEM ALL TO ENSURE
THEY ALL ALIGN TO THE GRID.
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>WE NEED TO DO MUCH THE SAME WITH THE FT232RL IC AS WELL.
NOT QUITE AS MUCH TO MOVE ON THIS AS THE ATMEGA8 BUT STILL SOME PINS TO ARRANGE.
AS BEFORE, RIGHT CLICK AND SELECT EDIT SYMBOL IN
LIBRARY.
REARRANGE AS AT RIGHT, THIS WILL REMOVE MOST
OF THE CROSSOVERS AND DOGLEGS ETC.
MAKE SURE YOU SET THE GRID TO 200 THOU AND
THE SNAP MODE TO QUARTER GRID AS YOU DID
BEFORE.
>NOW THAT’S ALL OF THE PARTS SORTED, WE DO NEED POWER (VCC) AND GROUND (GND) SYMBOLS
HOWEVER.
FIRST UP DO A LIBRARY SEARCH FOR GND, AND PLACE A SYMBOL FOR IT ONTO YOUR SHEET.
NOW SEARCH FOR VCC AND PLACE ONE ON YOUR SHEET.
RIGHT CLICK ON THE PIN OF THE GND PIN AND SELECT TO EDIT THE SYMBOL IN THE LIBRARY.
Notice the X at the bottom end of the symbol, this is the end we wire on to.
SELECT THE COMPLETE GND AND ROTATE IT, THEN USE THE LINE DRAWING TOOL TO MAKE IT
LOOK LIKE THE GND WE WANT TO USE.
To get the 4 lines I have at the right I had to change the grid snap mode to Half
Grid.
Save and update the component.
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>NOW WE HAVE THE SYMBOLS WE CAN LAYOUT THE CIRCUIT
MOVE P1, P2, P3 AND U1 TO A CLEAR SPACE ON YOUR SHEET (YOU CAN SELECT MORE THAN ONE PART AT A TIME BY
HOLDING DOWN CTRL AS YOU CLICK EACH ITEM).
TRY TO LINE UP THE PINS ON THE HEADERS WITH THE PINS ON THE ATMEGA8.
ONCE THEY ARE ALIGNED YOU CAN WIRE THEM UP BY CLICKING ON ONE X AND DRAGGING THE MOUSE TO THE X YOU
WANT TO CONNECT TO (SOMETIMES IT AUTO CONNECTS TO THE 2ND PIN BUT SOMETIMES YOU NEED TO CLICK THE 2ND
X).
HOPEFULLY YOU WILL SEE THAT THE X MARKS ALL DISAPPEAR AS YOU MAKE THE CONNECTIONS, IF THEY DON’T CLICK ON
THE VIEW MENU AND SELECT COLOURS (OR JUST PRESS C).
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UNSELECT THE CONNECTED PINS BOX AND CLICK OK. ONLY UNCONNECTED PINS WILL NOW SHOW THE X.
CONNECT UP THE REST OF THE
PINS.
COPY YOUR GND PORT 4 TIMES
AND PLACE ONE NEXT TO PIN 10
ON THE 3 HEADERS AND ONE
BELOW THE ATMEGA8.
WIRE THESE TO THE CORRECT
PINS.
DO THE SAME WITH VCC
PORTS, PLACE AND WIRE TO
PINS 9 ON EACH HEADER AND
ONE AT THE TOP OF THE
ATMEGA AND AN EXTRA ONE AT
PIN 20 OF THE ATMEGA.
NOTICE
THE CONNECTIONS
DOTS THAT APPEAR AT WIRE
JUCTIONS, THIS SHOWS THE
WIRES CONNECT AS OPPOSED
TO JUST CROSSING OVER.
NOW THIS CONNECTS MOST OF THE ATMEGA AND ITS HEADERS HOWEVER WE HAVE BYPASS CAPACITORS WE NEED
CONNECTED BETWEEN VCC AND GND. THE EASIEST WAY TO PLACE THESE IS, 4 IN A ROW CLOSE TO THE DEVICE AND
CONNECTED BETWEEN VCC AND GND PORTS.
PLACED NEAR THE AREF PIN20 MAKES THIS FAIRLY EASY.
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>ADDING NET REFERENCES
NET REFERENCES ALLOW FOR 2 OR MORE POINTS ON A CIRCUIT TO BE CONNECTED WITHOUT RUNNING A WIRE
BETWEEN THEM, IF YOU REFER TO WHAT YOU HAVE DONE SO FAR, THE VCC AND GND CONNECTIONS ARE NET
REFERENCES, AND ARE CONNECTED VIA VIRTUAL CONNECTIONS.
EACH OF THE WIRES BETWEEN THE HEADERS AND ATMEGA8 NEED TO BE LINKED TO NET REFERENCES AS WELL AS SOME
OTHER PINS ON THIS CIRCUIT.
A NET REFERENCE NEEDS A WIRE ATTACHED TO A PIN AND CAN NOT ME CONNECTED STRAIGHT TO A PIN.
USE THE ADD COMPONENT TAB BOTTOM RIGHT AND SELECT THE SCHEMA.CML LIBRARY.
SCROLL DOWN AND SELECT THE TO COMPONENT.
PLACE IT NEAR PIN 29 (PC6 RESET) AND CONNECT IT TO THE PIN, RIGHT
CLICK ON THE ‘TO’ ARROW AND SELECT CHANGE NET. TYPE RESET INTO
THE NET NAME AND LEAVE THE NET CLASS SET TO SIGNAL.
PLACE ANOTHER ‘TO’ NEAR THE RESET PIN ON SPI, CONNECT IT AND
CHANGE IT TO THE RESET NET.
RIGHT CLICK ON THE WIRE ITSELF AND SELECT DISPLAY NET NAME. THE NET
NAME WILL DISPLAY NEAR THE END OF THE PIN.
THESE 2 PINS ARE NOW CONNECTED.
PLACE 3 MORE ‘TO’ NEAR THE SPI CONNECTOR AND WIRE THEM, CHANGE THE NETS TO MATCH THE NAMES MOSI,
SCK AND MISO.
RIGHT CLICK ON THE WIRE CONNECTED TO PIN 15 ON THE ATMEGA8 AND
CHANGE THE NET TO MOSI, RIGHT CLICK ON THE WIRE ITSELF AND SELECT
DISPLAY NET NAME.
DO THE SAME FOR PIN 16 (MISO) AND 17(SCK).
FINISH OFF THE SPI CONNECTOR WITH VCC AND GND CONNECTIONS.
TO CHECK THESE ARE CONNECTED, RIGHT CLICK ON ANY OF THE WIRES
CONNECTED WITH NET REFERENCES AND SELECT HIGHLIGHT NET, THE NET SELECTED SHOULD BE HIGHLIGHTED IN A
LIGHT BLUE COLOUR.
WE WILL LOOK AT OTHER METHODS TO DO THIS LATER.
CONTINUE WITH THE ATMEGA SECTION OF THE CIRCUIT UNTIL IT LOOKS LIKE THE CIRCUIT BELOW.
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NEXT YOU NEED TO WIRE UP THE SPI CONNECTOR,
RESET SWITCH AND THE PULL UP RESISTOR FOR THE 2
ADC PINS
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TO FINISH OFF YOU NEED THE LED’S, RESISTORS AND HEADER P4.
A COMPLETED SCHEMATIC FOR THE CIRCUIT IS SHOWN ON THE LAST PAGE OF THIS TUTE, HOLDING Ctrl AND CLICKING IT
WILL OPEN A PDF COPY WITH BETTER DETAIL.
KEEP GOING UNTIL YOUR LAYOUT LOOKS SIMILAR.
NOTICE HOW THE ATMEGA8 HAS PIN NAMES FOR MOST PINS I.E. PB0, PB1 ETC. WE HAVE ALREADY USED SOME OF
THESE AS NET REFERENCES (MOSI, MISO, SLK ETC), IT WILL MAKE IT MUCH EASIER LATER ON AT THE PCB STAGE AND
DURING ANY TROUBLESHOOTING IF YOU LABEL AS MANY OF THE NETS AS YOU CAN.
JUST USE THE P LABEL WHERE IT EXISTS EXCEPT FOR THE PINS WE HAVE ALREADY SET (I.E. 15, 16, 17, 19, 22, 29, 30,
31 ), DON’T LABEL GND, AREF OR VCC AS THESE ARE ALREADY TAKEN CARE OF.
NOW WE JUST NEED AN OUTLINE FOR THE SHEET AND A TITLE-BOX.
>SHEET OUTLINE AND TITLE BLOCK
LIKE MOST THING THERE ARE SEVERAL WAYS TO ACHIEVE THIS, THE SIMPLEST IS TO ARRANGE
THE BLOCKS NEATLY ON YOUR SHEET, THEN USE THE ADD SHAPE RECTANGLE TOOL TO PLACE A
LARGE RECTANGLE ROUND YOUR SCHEMATIC.
ONCE PLACED YOU CAN CLICK ON ANY OF THE 4 SIDE TO DRAG AND RESIZE THE BOX.
NEXT WE NEED A TITLE-BLOCK, THIS GIVES INFORMATION ABOUT THE DESIGN, DRAWN BY,
DATE, COMPANY NAME ETC.
START BY USING THE TEXT TOOL (3 ABOVE THE RECTANGLE TOOL),
TO PLACE THE TEXT YOU WANT ON THE SHEET. ARRANGE THE
TEXT THEN PLACE RECTANGLES AND LINES TO SEPARATE THE
SECTIONS OF TEXT.
THIS MAY SEEM LIKE A BACKWARD WAY TO DO THINGS BUT IT IS EASIER TO SIZE THE BOX TO THE TEXT THAN SIZE THE
TEXT TO THE BOX.
NORMAL POSITION FOR A TITLE BLOCK IN LOWER LEFT CORNER, HOWEVER PLACE IT WHERE IT FITS BEST WORKS.
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DESIGNSPARK DOES HAVE SOME PRE-DRAWN SHEETS WITH TITLE BLOCKS BUT THEY ARE OF A FIXED SIZE AND OR THE
TITLE-BLOCK ITSELF ISN’T SUITABLE.
>LETS EXPLORE
THERE ARE A FEW FEATURES WE CAN EXPLORE NOW WHICH WILL MAKE THE PCB LAYOUT EASIER TO DO.
>NETS
NETS ARE NETWORKS OF CONNECTIONS BETWEEN PINS, YOU HAVE NAMED SOME OF YOUR NETS ALREADY, THE REST WE
NORMALLY LEAVE AS THEY ARE.
OPEN THE INTERACTION BAR F9, IF IT’S NOT ALREADY OPEN. SELECT THE
GOTO TAB.
AT THE TOP OF THE GOTO TAB, SELECT NET FROM THE DROP DOWN LIST.
THIS WILL SHOW A LIST OF ALL NETS DOWN THE LEFT HAND SIDE OF THE
WINDOW.
SELECTING ANY ONE OF THESE NETS WILL SHOW ALL THE CONNECTIONS OF THE
SELECTED NET HIGHLIGHTED IN GREEN.
NOTE A SELECTION OF VCC CONNECTIONS HIGHLIGHTED AT RIGHT.
TO REMOVE/TURN OFF THE HIGHLIGHT, CLICK ON THE VIEW MENU, GOTO, REMOVE
HIGHLIGHT.
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>COMPONENTS
THE SAME WE YOU CAN VIEW THE NETS WE CAN ALSO LOCATE COMPONENTS IN OUR SCHEMATIC AND LATER THE PCB.
FROM THE GOTO, SELECT COMPONENT AND CLICK ON ANY COMPONENT DESIGNATOR AND IT WILL HIGHLIGHT IN THE
SCHEMATIC.
THIS MAKES IT EASY TO FIND A PARTICULAR COMPONENT IN THE SCHEMATIC AND AS YOU WILL FIND LATER ON, IN THE
PCB LAYOUT AS WELL.
TO REMOVE/TURN OFF THE HIGHLIGHT, CLICK ON THE VIEW MENU, GOTO, REMOVE HIGHLIGHT ETC.
YOU CAN USE THE GOTO TO FIND COMPONENTS BY TYPE AS WELL.
WHEN FINISHED SEE YOUR LECTURER AND OBTAIN PART II OF THIS TUTE
“SCHEMATIC TO PCB”.
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