[sdiy] Should I use REAL PCBS or ETCHED

[Dan Snazelle]

here is the situation
a friend of mine paid me for parts and time to make him a pretty monstrous synth.
he wants it sooner rather than later.
its mostly done but only in the PROTO sense (breadboards)


now my original thought was just to etch it.
but that would require lots of drilling, basic pcb design AND etching.
so then i thought, well i might as well send it to a pcb HOuse.

but that requires more time, money, and having someone else draw up those fancy boards.

for a pretty large project (basically a one vco modular synth without patch cables) is it feasable to just use HOME ETCHING or even perfboard?
there is no plan to make more than one of these (unless of course others are interested in pcbs) so that makes me think etching might be the way to go

BUT after 6 months of testing, checking and figuring out how to make it work (its main function is as a synth to be controlled/manipulated with an electric guitar and or cello...not F TO V though..mainly using octave dividers) I dont know if i want to add three weeks drilling and etching to the pile of tasks!!

any advice??

thanks

--------------------------------------------
check out various dan music at:

http://www.myspace.com/lossnyc


http://www.soundclick.com/lossnyc.htm


http://www.indie911.com/dan-snazelle
(or for techno) http://www.myspace.com/snazelle


> Date: Thu, 14 Aug 2008 08:32:49 +0000
> Subject: Re: [sdiy] BIG PSU ISSUES
> From: paul.maddox.mail-list at synth.net
> To: synth-diy at dropmix.xs4all.nl
>
> Dan,
>
> Are the output sense connectors on the PSU connected correctly?
> My Powerone PSU requires these to be connected in order to regulate.
>
> Just a thought
> Paul
>
>> I have a nice powerone supply. its a 12volt or 15 volt +/- volt. I am
>> running it at 12 volts and without a load i used the trimmers to set it
>> for 12volts.
>>
>> i think this model can handle at least .5 amps per channel. i think
>> actually .75 (in +15/-15 mode it handles less amperage)
>>
>> now when i hook up my current project, which is three giant breadboards
>> (of mainly CMOS low draw chips) to my STAR breadboard (which is the PSU
>> hooked up to a breadboard which everything else plugs into with 22r
>> resistors as fuses), and i take a reading of the VOLTS of my project i get
>> a reading of 9 volts.
>>
>> My questions
>>
>> 1. there are trimmers on the PSU to push it back up to almost 12 volts
>> post load..should i do this? or are the trimmers only for PRE LOAD?
>> 2. how can i get around this? could my PSU be messed up?
>>
>> 3. i know these are low amp chips. i only have ONE led on the entire
>> project. there are some opamps.
>> is load voltage not the same? do i not need to worry? or should i get a
>> measured 12 volts? and -12 volts?
>>
>>
>> thanks so much
>>
>>
>>
>>
>>
>>
>>
>> --------------------------------------------
>> check out various dan music at:
>>
>> http://www.myspace.com/lossnyc
>>
>>
>> http://www.soundclick.com/lossnyc.htm
>>
>>
>> http://www.indie911.com/dan-snazelle
>> (or for techno) http://www.myspace.com/snazelle
>>
>>
>>> From: philip.macphail at ntlworld.com
>>> To: neil.johnson97 at ntlworld.com; synth-diy at dropmix.xs4all.nl
>>> Subject: Re: [sdiy] Another SSM2164 question
>>> Date: Wed, 13 Aug 2008 21:49:04 +0100
>>> CC:
>>>
>>>>>
>>>>
>>>> Thanks, and cheers. Now working on schematic entry and then a PCB.
>>>> Thanks to an A3 laser printer from a local Freecycler (who, ironically
>>>> is/was on the list as well - hi Phil!) I can now print out my
>>>> schematics
>>>> BIG!
>>>>
>>>> Neil
>>>> (likes his diagrams in A3)
>>>>
>>>
>>> Hi Neil,
>>> Yes I'm still here, and to add to the irony, I have a half-finished
>>> VCO based on the SSM2164. The shunt R-C networks on the input that
>>> started this thread were a real pain to accommodate with surface-mount
>>> components, unless they were put on the back of the board. The larger
>>> DIL version would make things much easier.
>>>
>>> Phil (happy with A4 schematics)
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
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>
>
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