I'm trying to figure out a lightweight ventilation solution for my
terrarium[1], and am considering a battery powered 80mm fan as a solution.
I don't need a lot of circulation, just a little flow.

How many days could an 80mm fan run off of a 9v battery? Is there anything
(ie, resistor) that I can put between the two to lengthen the life of the
battery?

Are there any commercial solutions that would meet my needs?



[1] I have a 3"x3" opening at the top back of the terrarium hood[2],
which I plan to cover with a screen and use for venting. I'm thinking
I can cover it with a cpu fan pushing air in, and the air can exit using
the various other nooks and crannies in the lid.

[2] There's also an 8W Fluorescent light on the hood. Is there a simple
way to make use of the power to power a CPU fan?



--
.................................................. ............................

"Listen to those who are seeking the truth; doubt those who have found it."

Andre Gide

.................................................. ............................
http://www.memeticcandiru.com

On Fri, 19 Dec 2003 04:59:50 GMT,
wrote:

I'm trying to figure out a lightweight ventilation solution for my
terrarium[1], and am considering a battery powered 80mm fan as a solution.
I don't need a lot of circulation, just a little flow.

How many days could an 80mm fan run off of a 9v battery? Is there anything
(ie, resistor) that I can put between the two to lengthen the life of the
battery?

Are there any commercial solutions that would meet my needs?



[1] I have a 3"x3" opening at the top back of the terrarium hood[2],
which I plan to cover with a screen and use for venting. I'm thinking
I can cover it with a cpu fan pushing air in, and the air can exit using
the various other nooks and crannies in the lid.

[2] There's also an 8W Fluorescent light on the hood. Is there a simple
way to make use of the power to power a CPU fan?




heres a bone for ya




battery capacity (milliamp*hours) / total current (milliamp) = battery
life (hours)


hurc ast

On Fri, 19 Dec 2003 04:59:50 GMT,
wrote:

I'm trying to figure out a lightweight ventilation solution for my
terrarium[1], and am considering a battery powered 80mm fan as a solution.
I don't need a lot of circulation, just a little flow.

How many days could an 80mm fan run off of a 9v battery? Is there anything
(ie, resistor) that I can put between the two to lengthen the life of the
battery?

Are there any commercial solutions that would meet my needs?



[1] I have a 3"x3" opening at the top back of the terrarium hood[2],
which I plan to cover with a screen and use for venting. I'm thinking
I can cover it with a cpu fan pushing air in, and the air can exit using
the various other nooks and crannies in the lid.

[2] There's also an 8W Fluorescent light on the hood. Is there a simple
way to make use of the power to power a CPU fan?


9v battery=500 to2000 milliamp hours

hurc ast

As a followup, I've found a solar powered battery charger on Ebay that
outputs a small ammount of juice. This would be ideal, as it would just
run off of the residual light off of the hood lamp.

It's at:
http://cgi.ebay.com/ws/eBayISAPI.dll...ategory=32 40

Does anyone have a feel if it would power a 80MM fan or not? Would I be
better off considering a slightly smaller fan?




--
.................................................. ............................

The rank and file are not philosophers, they are not educated to think for
themselves, but simply to accept, unquestioned, whatever comes.

-Susan B. Anthony

.................................................. ............................
http://www.memeticcandiru.com

Why not buy a voltage regulator that steps down 120 to 6,9,or 12 volts
instead of buying batteries?

@Radio Shack !

Jd

wrote in message
news:aBvEb.112507$bC.84784@clgrps13...
I'm trying to figure out a lightweight ventilation solution for my
terrarium[1], and am considering a battery powered 80mm fan as a solution.
I don't need a lot of circulation, just a little flow.

How many days could an 80mm fan run off of a 9v battery? Is there
anything
(ie, resistor) that I can put between the two to lengthen the life of the
battery?

Are there any commercial solutions that would meet my needs?



[1] I have a 3"x3" opening at the top back of the terrarium hood[2],
which I plan to cover with a screen and use for venting. I'm thinking
I can cover it with a cpu fan pushing air in, and the air can exit using
the various other nooks and crannies in the lid.

[2] There's also an 8W Fluorescent light on the hood. Is there a simple
way to make use of the power to power a CPU fan?



--

.................................................. ...........................
..

"Listen to those who are seeking the truth; doubt those who have found
it."

Andre Gide


.................................................. ...........................
..

http://www.memeticcandiru.com

king@ star.net wrote in message
...
On Fri, 19 Dec 2003 04:59:50 GMT,
wrote:

I'm trying to figure out a lightweight ventilation solution for my
terrarium[1], and am considering a battery powered 80mm fan as a
solution.
I don't need a lot of circulation, just a little flow.

How many days could an 80mm fan run off of a 9v battery? Is there
anything
(ie, resistor) that I can put between the two to lengthen the life of the
battery?

Are there any commercial solutions that would meet my needs?



[1] I have a 3"x3" opening at the top back of the terrarium hood[2],
which I plan to cover with a screen and use for venting. I'm thinking
I can cover it with a cpu fan pushing air in, and the air can exit using
the various other nooks and crannies in the lid.

[2] There's also an 8W Fluorescent light on the hood. Is there a simple
way to make use of the power to power a CPU fan?


9v battery=500 to2000 milliamp hours

hurc ast

It sounds like numerology to me, kindly take this crap to an appropriate
newsgroup. -Daryl S. Kabatoff

king@ star.net wrote in message . ..
On Tue, 23 Dec 2003 22:44:32 GMT, "Marcia and Me"
wrote:


king@ star.net wrote in message
.. .
On Fri, 19 Dec 2003 04:59:50 GMT,
wrote:

I'm trying to figure out a lightweight ventilation solution for my
terrarium[1], and am considering a battery powered 80mm fan as a
solution.
I don't need a lot of circulation, just a little flow.

How many days could an 80mm fan run off of a 9v battery? Is there
anything
(ie, resistor) that I can put between the two to lengthen the life of the
battery?

Are there any commercial solutions that would meet my needs?



[1] I have a 3"x3" opening at the top back of the terrarium hood[2],
which I plan to cover with a screen and use for venting. I'm thinking
I can cover it with a cpu fan pushing air in, and the air can exit using
the various other nooks and crannies in the lid.

[2] There's also an 8W Fluorescent light on the hood. Is there a simple
way to make use of the power to power a CPU fan?


9v battery=500 to2000 milliamp hours

hurc ast

It sounds like numerology to me, kindly take this crap to an appropriate
newsgroup. -Daryl S. Kabatoff


yea but these numbers use REAL MATH


hehehehehehehehe

see ya fruitcake

hurc ast

This is basic math at best.
Just what is "real" math?