Homebrew PCBs

Although I agree that nothing in the PCB manufacturing should give off CO, other things 
such as soldering with rosin flux can give off CO and many other volatile chemicals. Still, 
having a CO detector going off is not normal and should definitely be checked out professionally. 

--- In Homebrew_PCBs@yahoogroups.com, Marko Pavlin <mp@...> wrote:
>
> It's not neccessary a carbon (monoxide), which can trigger the CO 
> sensor. They are cross-sensitive to hydrogen, which is intensively 
> produced by chemical reactions with etching. The CO sensor has filters, 
> which increase the selectivity, but they may get aged which makes whole 
> sensor more sensitive to e.g. hydrogen.
> 
> Marko
> 
> Herbert E. Plett pravi:
> >
> > No part of a PCB manufacturing contains carbon, so it's
> > unlikely that CO can be produced other than by burning
> > something.
> > The only burning you mention are the furnace and the car.
> > Check them. A remote chance is that some hidden electrical
> > conductor might be 'almost' burning it's duct... fire
> > hazard! although I believe it would produce more Cl than
> > CO.
> >
> > --- Stefan Trethan <stefan_trethan@... 
> > <mailto:stefan_trethan%40gmx.at>> wrote:
> >
> > > This happens when you use way too high concentrations of
> > > HCl or both.
> > > If the CuCl etchant is maintained at normal levels, and
> > > covered when
> > > not in use, there is no corrosion on steel nearby.
> > >
> > > It's well worth mentioning, so that others may avoid the
> > > tedious work
> > > of removing rust, but i doubt it would do damage to a CO
> > > detector
> > > which likely isn't even in the same room.
> > >
> > > ST
> > >
> > > On Jan 23, 2008 11:03 PM, <kevinmwolf@... 
> > <mailto:kevinmwolf%40aol.com>> wrote:
> > > >
> > > > Ed,
> > > >
> > > > I have experienced some weird situations when using
> > > Muriatic acid and hydrogen peroxide to etch. The first
> > > couple of times I etched, EVERYTHING metal in the room
> > > that I used oxidized over the next couple of days. So
> > > yes, there is a small chance that etching can damage
> > > nearby electronics. However, I would call your local FD
> > > (non-emergency #) and have them check the house for CO
> > > levels.
> > > >
> > > > Best of luck,
> > > > -Kevin Wolf
> > > >
> >
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