[sdiy] Should I use REAL PCBS or ETCHED

Thu Aug 14 15:51:33 CEST 2008

my $.02 adjusted for world currentcy and inflation

If it is truly a one-off or a custom design, use perfboard.

I use Vectorboard and T42-A terminals, and my circuits are still
solid thirty years later.

For most DIY work you do not need the additional performance that an etched
PCB offers.

A poor layout on a PCB is not a joy either. You can have big layout
troubles... where being able to cross wires on a perfboard (not spaghetti btw)
allows you more freedom.

If you want to build TWO, perfboard might not be the best choice...

H^) harry

On Thu, 14 Aug 2008 12:52:19 +0000, Dan Snazelle wrote
> 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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Harry Bissell & Nora Abdullah 4eva