Bastl Instruments SPA V1.0 User manual

SPAV1.0ASSEMBLY
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Beforestartingthiskit,preparethefollowingtools:Solderingiron(1520Wwilldo),
multimeter,protectiveeyewear,flushcutters,n2.hexscrewdriverorallenkey,phillips
screwdriverandsomecoffee.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.
DOWNLOADS
● schematicsandboarddiagram–PDF
● AndtheBillofMaterials(BOM)–Googledocs
● usermanual–PDF
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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
1x10kΩ0,4W1%resistor
1x2x5pinmalepinheader
4xpotknob
6x100nFcapacitor
1x6pinmalepinheader
1xprogrammed
Atmega328
2x10μFcapacitor
1x10pinfemalepinheader
1x11mmspacer
1x1N4007DIODED7.5
4x100RΩ0,4W1%resistor
1x10mmspacer
1x7805voltageregulator
2x1kΩ0,4W1%resistor
6xjackwasher
1x16MHzresonator
2x100kΩ0,4W1%resistor
6xjacknut
1x100mAPTCfuse
1xswitch
2x6mmscrew
1xMCP6002ICinfoam
6xjackconnector
2x8mmpanelscrew
1xMCP6004ICinfoam
1x10pinmalepinheader
1ximbuskey
1x8pinDILsocket
4x100klinpotentiometer
1x10to16pinpowercable
1x14pinDILsocket
1xtopPCB
1x6pincable
1x28pinDILsocket
1xbottompcb
1xlaserengravedpanel

Weevenincludedsomeofthebestqualitysolderwefoundtohelpyousoldereverything
faster.
Allthepartsshouldcomeinthreebagsseparatedfortopboard,bottomboardandthe
hardware.
TheSPAmoduleconsistsoftwoboards,thetopboardisusedforalloftheUIcomponents
andthebottomboardistheheartofthesoundprocessingcircuit.
Beforestartingsoldering,takeyourtimeandfindalltheresistorsvalue,eitherusinga
multimeterorlookinguptheircolorcodes.
BOTTOMBOARD
Letsstartwiththebottomboard,withtheshortestandsmallestparts.
Thereisone10KΩresistor,placethatandsolderittotheboard.Nextsolderthediode.Be
carefulthough,diodesarepolarized!Makesurethatthemarkingringonthediodebody
matchesthemarkingonthecircuitboard.
Yourboardshouldlooklikethis(clickontheimagestoenlarge):

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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.

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Thenaddthecapacitors,therearesix100nFcapacitors(marked104,followthelinkfor
moredetailsoncapacitorcodes).Theymightbeinceramicorpolyesterfilmpackage,don’t
worrytheyarenotpolarized.
NowmoveontotheTPCfuse.Itlooksquitesimilartoaceramiccapacitorandareplacedin
theblankrectangularmarkingsontheboardnearthevoltageregulator.
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.
Yourboardshouldlooklikethis:

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Now,it’stimeformorecapacitors.Takethetwo47μFcapacitorsandplacethemonthe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.
Also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
Nowprepareyourpinheadersbycuttingtheminthecorrectsizes.One2x5powerpinsand
one6pinsheaders.
Takethe10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otherheaders.

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TOPBOARD
Nowpopulatethetop.Againstartwiththeremainingresistorsandsolderthemin.
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Nextcutmoreofthebreakawayheadersandfemaleheadersattherightsizes,10pinsand
8pins.Youwillalwayslooseonepinwhencuttingthefemaleheaders,sodon'tworryabout
it.
Nowto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.
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Unscrewthetopspaceragainanddisconnectthetwoboards.
Placethefour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andtheswitch.

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ENCLOSUREASSEMBLY
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!

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Theswitchshouldhavesomespaceofftheboard,orelsetheywon’tcomethroughthe
panel,likeintheimagebelow.Makesurethateverythingisnicelyalignedandsolderthe
components.
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Congratulations!Youhavemadeitthrough,nowjustconnectthebottomboard,addthe
knobs,connecttheexpansiontothemainboard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!Andmakesurethatconnectioncableonbothmodules
areinthesameside!

TROUBLESHOOTING
didyouplugitin?
RELEASES
● 1.0–Originalrelease.
