Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Monday, June 27, 2005 4:53 PM
Subject: [Homebrew_PCBs] air pumps


> Hi,
>
>
> What else could one use as air pump for bubble agitation?
> Because i had so little bubble holes bubbling i connected a rubber ball
> (with one-way valves) instead of the pump.
> Surprisingly the bubbler hose works really well if i compress the ball by
> hand. The small aquarium pump just doesn't have enough pressure or flow to
> operate enough of the holes to create a even curtain.
>
>
> Now i'm looking for a larger pump. There are cheap piston compressors, but
> because i want to run the thing closed loop (take the air from inside the
> etching tank) they are unsuitable with their aluminum cylinder.
> I thought about buying a 10 piece lot of small pumps, and connecting them
> together (maybe some series some parallel) to increase the airflow. You
> think that would work?
>
> Any other ideas welcome, i just can't come up with a solution.

If it's only for occasional use, why not pump up an old car wheel and tyre.
That should have plenty of pressure and capacity to etch a few boards. Can't
be a closed system, of course.

Leon



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