Bastl Instruments GRANDPA v1.0 User manual

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GRANDPAv1.0Assembly
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Beforestartingthiskit,preparethefollowingtools:Solderingiron(1520Wwilldo),flushcutters,no.2
hexscrewdriverorallenkeyandphillipsscrewdriver.Alsobrieflygothroughthisguideandmakesure
thatyouunderstandallthesteps,ifyouarehavinganytroublesdon’thesitatetoseekhelpattheforum.
Wesuggestthatyouworkinacleanandawelllitenvironmenttoavoidaccidentsorlosinganyofthe
smallcomponents.
IMPORTANT!
Ifyouhaveneversolderedbefore,checkoutthisgreattutorialfirst.
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Andpleasecheckthatyourboardsarethesameversionasthisguideandthatyourkitcontainsthe
followingitems:

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BOM–BILLOFMATERIALS
6x100kresistor
1xMCP6002
1x2x5maleheader
3x10kresistor
1xmicroSDslot
1xrightangleheader
11x1kresistor
1x5mmcaRGBled
1xribboncable
7x100nFcapacitors
1x7segment
2xpotknob
2x10uFcapacitors
2x3mmdiffusedgreenLED
1xmicroSDslot
1x1N4007diode
1x16MHzresonator
1x11mmnutnutspacer
4xjackconnector
2xlinearpotentiometer
1x10mmnutscrewspacer
1xMCU
6x17mmsmallbutton
4xjackwashers
1x7805voltageregulator
1x100mAfuse
4xjacknuts

1x78L33voltageregulator
1x28pinDILsocket
2x6mmscrews
2x2N3906transistor
2x8pinDILsocket
2x8mmscrews
1xCD4050BE
3x16pinDILsocket
1xFrontpanel
2x74HC595
1xfemaleheader
1xmicroSDCard
1xMCP4921
1xmaleheader
1xdisplaywindow
3xPCB
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TheGRANDPAmoduleconsistsofthreeboards,thetopboardisusedforalloftheUIcomponents,the
bottomboardistheheartofthesoundgeneratingcircuitandasmallSDcardholderboard.
Bottomboard
Letsstartwiththebottomboard,withtheshortestandsmallestparts.
Takeastripofresistorsandlookupthevaluesprintedonthecircuitboards.Startwiththe100Kand1K.
Placethemthroughtheboard,solderthemandclipofftheexcessleads.
Attention!
Wronglabelontheboard.The100Kresistorfrominthelowerleftpartisomittedandinsteadjust
solderinoneofthecutoffleadsfromtheotherresistors.Alsothe1Kaboveitiscompletelyomitted.
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Nextsolderthepowerprotectiondiode.Becarefulthough,diodesarepolarized!Makesurethatthe
markingringonthediodebodymatchesthemarkingonthecircuitboard.

Bynowyourboardshouldlooklikethis:
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Nextplaceandsolderthesockets.Makesurethatthenotchisinthesamedirectionasprintedonthe
circuitboard.TheATMEGAandMCP4921circuitboardprintshavealittle*orientationmarkinstead
ofanotch.Bothshouldbefacingdownwards.
Thenaddthecapacitors,thereareseven100ncapacitors(marked104).Theymightbeinceramicor
polyesterfilmpackage,don'tworrytheyarenotpolarized.
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Nowmoveontotheprotectivefuse.Itlooksquitesimilartoaceramiccapacitorbutisplacedintheblank
rectangularmarkingontheboard.

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Nextsolderinthetwo2N3906transistor,theirmarkonthePCBiscrossedout.Youmighthaveto
straightenitsleadsalittlebit.Alsosolderthe78L33voltageregulator,becarefulthough,theylookquite
similar.Andtheirorientationshouldmatchtheprint.
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Nowsolderthe16MHzresonator,itsanorangecomponentwith3leads,don'tworryit’s
notpolarized.Yourboardshouldlooklikethisnow.
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Bottomboardbackside
Takethe16pinpowerconnectorandplaceitalsoonthebacksideof
theboard.Itmightbetrickytosolderitstraight,butyoucanplace
somethinglikeyourcutterundertheboardtoholditlevel.Alsofirst
solderinjustoneofthepins,thentaketheboardinyourhandandre
heatthatpinwhilepressingdownontheheadertoalignit(becareful
though,youdon’twanttotouchthepinyouareheatingup)waitforit
tocoolandsoldertherestofthepins.Dothesameforthe
programmingheader.
ATTENTION!
Wronglabelontheboard.The100uFelectrolyticcapacitorsare
replacedwith10uF.
Now,it'stimeformorecapacitors.Takethetwo10uFelectrolytic
capacitorsandplacethemonfrontsideoftheboard.Becareful,these
arepolarized!capacitorsandshouldbesolderedtherightwayin.
Thereisa+markingonthecircuitboardthatshouldmatchthelong
leadofthecapacitor,thesideisalsomarkedonthebodyofthecapacitorwithawhite
strip.

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Alsosolderthe7805voltageregulator.Benditslegasclosetothebodyaspossible,atarightangleto
makesurethatitliesflatonthecircuitboard.
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Topboard
Nowpopulatethetop.Againstartwiththeremainingresistorsandsolderthemin.
ThensoldertheICsocketandthedisplay.Makesurethatthenotchonthesocketmatchestheprintonthe
board,andthatthedisplayisorientedthesamewayastheprintontheboard.
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Nextensurethattheheadersareproperlyaligned,screwthehexscrewandthestandoffonbottomboard.
Placethefemaleheadersonbuttonboardwiththemalepinsinserted.Nowplacetopboard,screwwith
thestandoffscrewandfinally,soldertheheaderstobothboards.Justlikeintheimagebelow.
Enclosureassembly
BeforeyoucontinuewiththeUIcomponents,insertthescreenwindowintothefrontpanel.
Placetheplasticscreenwindowintheopeningwiththeprotectivefilmfacingupwards.Youmighthaveto
filethepanelopeningalittlebitifyouarenotabletofititin.Makesureitissittingflatandpushitallthe
wayinuntilit'slevelwiththepanel.Youmayhavetopressthepanelflatagainstatable.Thentakeoffthe
protectivefilm.
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Alsoplacethe74LS595chipinit’ssocket.Makesurethatitisorientedproperly!Thenotchesshould
match!
ContinuewiththerestoftheUIcomponents,Placethetwopotentiometerstotheirrespectedplaceson
theboard.Pushthemwelluntiltheysitabsolutelyflatontheboard,butdon’tsolderthemyet.
Next,placethemonojacksontheboard,thebuttonsandtheLEDs.

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TheLEDsarepolarizedsomakesurethatthelongleg(+)isfacingupwards.Also
thenotchonledandcircuitboardshouldmatch.
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TheRGBLEDlongleadshouldbeinthethirdholeaswellasthenotchesshouldmatch,likeinthe
picturebelow.Stilldon’tsolderanythingyet.
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Againwewanttomakesurethatallthecomponentsareproperlyalignedwiththefrontpanel,sotakethe
standoffandplaceitintheopening.Checkthatallthecomponentscamethroughandthenscrewthe
woodenfrontpanelwiththesecondhexscrew.Alsosecurethejackstothepanelwiththewashersandthe
nuts.
Important!
Don’ttightenthescrewsandjackwasherstoomuchasyoumaydamagethem!
TheLEDsshouldhavesomespaceofftheboard,orelsetheywon’tcomethroughthepanel,likeinthe
imagebelow.
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SoldertheLEDsandrestofthecomponents.
Turnovertheboardandclipoffthelongleadsofthejacksortheymightshortthecapacitor.

SDBoard
Nowit’stimeforalittlechallenge.SoldertheSDcardholdertoitslittleboard.ItisSMDcomponentbut
don’tletthatscareyou,it’sprettysimple.Afinetipsolderingironissuggestedhere.
Thencarefullyplacethecardholderontopandmakesureit'salignedproperly,maybeholdinplacewith
tweezers.Solderthetopsidepadstomakethecardholdersticktotheboard,checkthattheholdersitsflat
ontheboard.Carefullysoldertherestoftheleads,byplacingthesolderingironperpendiculartotheedge
oftheleadandapplyingsoldertothepad.Makesurethattheydon'tbridge.
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Alternativelyyoucanapplysomesoldertoallthepadsbefore
placingthecardholderandthenreheatthem.
Supermegaimportant!!!Respectchippolarity.
Beforeconnectingtheboardstogetheragain,inserttheICchipsintotheirsocketsofthebottomboard.
Againmakesurethatthenotchonthechipsisfacingthesamedirectionasthenotchonthesockets.

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TofinishsolderingtheSDboard,taketherightangleheadersandinsertthem
intothetipholesontheboard,alsoinserttheminthebottomboardandscrew
bothboardsbackinplace.TheSDcardholdershouldbewellalignedwiththe
openingonthefrontpanelbutalsositflatonthebottomboard.Turnyour
moduleonthesideandsoldertheSDboardsockets.

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Congratulations!Youhavemadeitthrough,nowjustaddtheknobs,inserttheSDcardwithsamplesand
youarereadytoenjoyyournewmodule.
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Beforeyouconnectanything,makesurethatyoursystemisdisconnectedfrompower.Alsodoublecheck
thepolarityoftheribboncable,theredcableshouldmatchthe12Vrailbothonthemoduleandonthe
busboard!
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