On Tue, 07 Nov 2006 17:56:41 -0500, PeterD wrote:

On Tue, 07 Nov 2006 07:02:47 -0800, T-n-T wrote:

In article , T-n-T
wrote:

In article , PeterD
wrote:

On Mon, 06 Nov 2006 07:46:14 -0800, T-n-T wrote:

In article , PeterD
wrote:

On Sat, 04 Nov 2006 15:09:41 -0800, T-n-T wrote:

Thinking more about it now I do want to err on the side of not killing
my terrarium inhabitants. So a wall wort transformer is the way to go.
the purpose of using wire and a resistor is so the wire can be sealed
in silicone tubing for fish tanks and siliconed on the ends., it just
seems easier to seal up. what theory do I need to apply to heat up say
4 feet of wire not just the resistor?



Okay so I now know how to come up with the length of wire and
transformer. If I wanted to use a long wire and coil it, do the coils
absolutely have to not touch? What if they do? I believe a smaller wire
that is longer and coiled will give me a more pliable cable.

lildog


Ok, i don't know if this falls within the realm of electronics but you
guys may be able to point me in the right direction. Is there a formula
to determine the amount of heat coming off of on eof these cables?

What unit of measure do you think you'd like to see? If I say 15
Joules will that make sense? If I say 15 watts then how about that?
Or, are you interested in temperature rise? Or BTUs? Or Calories?

bg

There are so many ways of saying that!

And, if you are interested in BTU/Hour, 15 watts will give
approximately 51.1 BTU/Hour of heat. A lot depends on ambient
temperature where your tank is located (cool or hot?) and size and
material of construction.

I think you'd be best off using a thermostat to regulate temperature
myself.