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Re: DIY controllers

I've built the indicator part of Gary's, and stopped because that was
enough to tell me if I had the right level of CO2.  I had started to play
with the photocell part, and was noticing it wasn't particularly accurate
on my system, possibly because I didn't have the right CdS cell.

I also have Jim Hurley's full notebook on building the CO2 controller...
he sent me a xerox with photos back when he did it.  Well-documented &
thought out.  But again, manual injection using needle valve flow
regulation was enough.

   - Erik

On Thu, 10 Dec 1998, Jay Dike wrote:

> Has anyone tried the DIY CO2 controllers described in the Krib CO2
> FAQ's?  One was submitted by Gary Bishop and one by Jim Hurley, I
> believe both were orignally submitted before 1993.  I'm interested to
> know if other people had success building and using them.

Erik Olson
erik at thekrib dot com