"Ole Bob" wrote
====
Hi Marv,
Just out of curiosity why do you want a grain of wheat lamp?
If you want a lamp for short circuit protection go to an automotive parts
store
and get a lamp with the least current rating. Their catalogs will tell you
that.
If you want to know the current in the circuit go to Harbor Freight and get
a
DMM for $4.00., That's hard to beat.
"Ole Bob"
====
Hi "Ole Bob",
Over the past few months, the "grain of wheat" lamp has been mentioned on
various occasions (feeding my curiosity :)
I agree with you on the matter but, when I encountered a CS Generator that
had a grain of wheat lamp in its circuit, I decided that I needed to know
its characteristics. I see that it is very useful for announcing short
circuits, which are "a plenty" in my friends 3x9 volt "Genny", as the
electrodes were bent at the top to hang over the edge of the mason jar. When
alligator clips were applied, they had a "mind of their own", as to their
position/direction. The man "fussed" with them quite a bit, with many
instances of shorting the circuit, before he was satisfied (arriving at
about a 5/8 inch more or less parallel position).
I was astonished on two points:
1+ The streams of tiny bubbles appeared almost immediately (he heated the
DW to 160F prior to start)
2+ He stopped the process within three minutes (By then, the solution was
looking a bit cloudy. An hour later, it was still cloudy. The batch that he
had made some weeks ago was clear. I assume that, over time, this one would
become clear as well.)
I like the concept Marshall Dudley gave us:
====
And if you put an LED in series with it, you will get an indicator as well.
Marshall
====
Which Wayne Fugitt is using:
====
Evening Marshall,
At 03:12 PM 7/11/2003 -0400, you wrote:
>And if you put an LED in series with it, you will get an indicator as well.
Yes, and for the people who have no instrumentation, a keen eye can
tell when the distilled water is defective.
I reject many water samples based on LED brilliance alone.
Wayne
====
It appears that this would be a good, low cost, indicator for the process in
a give-away generator for the uninitiated. Otherwise, I like Mike's
contribution to this topic:
====
So you really don't need to spend time looking for this bulb. A simple
series resistor will do the same thing. You can take an old radio apart
and find lots of them.
Best Regards,
Mike Monett
====
Thank you! I send my gratitude to you all for your insights and
assistance.
Best regards,
:) Marv
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