Homebrew PCBs

> If you place a spinning tube in water it will form a pump BUT the water
> will take the route of least resistance - straight back out the end of
> the tube! What you need to do is stop the water from flowing back out
> the tube. If you block the end of the tube apart from a hole in the
> centre the water will be sucked up the hole then forced to the outside
> of the tube. Now the only place for it to go is upwards. To work for
> spray etching you will probably need a fairly large diameter tube
> (50mm?) and a reasonable speed.
>
> Les

good point...

i think we didn't catch that one ;-)

thanks

ST