back-to-back boards?

[gaussmarkov]

i'd appreciate feedback on this idea.  i have a layout that i could "fold" so that i have two boards that would sit back-to-back (with insulation in between).  here's my example:



if i make two boards by breaking at the dashed line and then using hookup wire to connect them, will i run into some kind of interference (or other problem) if they are placed back-to-back in the enclosure?

thanks for any help!

[jrem]

another way to do this is with header pins on on board and sockets on another, then the second board becomes a "mother board".

Or you can just solder the header pins to each board.  You will need to support the board at the opposite end, though, either with header pins or spacers/machine screws/ silly putty, etc.

Else, what are you going to insulate it with, and will your snipped leads break through the insulation?  I would go with the header pins, IMO.

[Gringo]

Check this out:





Original article (Big Muff at pisotones):

http://www.pisotones.com/BigMuffPi/bm.htm

[petemoore]

 Â  Hard to say for sure, like anything that's not been done much [AFAIK]
 If two traces, close to one another and running along the same 'line' contain say gained up output, the other an input trace, it would be as likely a place for cross interferance to occur as any.
 I've done this trick, but used a urethane clad [I have 5 mil. urethane sheets which I can shape, cut and seal with one heat process, you could use packaging plastic sheets on both sides, taped or melted together along the edges or at 4 points.
 Anyway I too my grounded copper sheet, the size of the larger Cct. board, clad in urethane so it's completely insulated on both sides, and sandwiched that between the two boards...maybe it was overkill, but I didn't get any problems like noise or oscillation I'd gotten with other high gain/gain circuits sharing a box.

[gaussmarkov]

thanks everyone!  jrem nailed it:  use header pins.  brilliant.  nice link gringo because that's exactly the kind of build i have in mind.  and petemore, you've already experimented with this and dealt with the same issues.

i guess no insulation will be necessary.  the header pins will keep the boards apart.  i thnk i'll go with two equal size boards that fill the space and change the layout so that the pot hookups are all on one side.

[petemoore]

  Nice !!
  If I ran out of those, I'd use a little thicker solid core wire, to fashion one makeshift header in each of the 4 corners. and clamp spacer boards in to parallel the circuit boards for soldering.

[Paul Perry (Frostwave)]

And then there is "cordwood" http://research.microsoft.com/users/gbell/craytalk/sld034.htm 
Repairs are a bitch, though.......
Seriously, in some of my commercial pedals, I have two boards one above the other, connected by ribbon cable. Works for me!

[gaussmarkov]

And then there is "cordwood" http://research.microsoft.com/users/gbell/craytalk/sld034.htm 
Repairs are a bitch, though.......
Seriously, in some of my commercial pedals, I have two boards one above the other, connected by ribbon cable. Works for me!

excellent.  cordwood looks like something even eagle cannot help much with.