From: Sam Nichols
Subject: Re: Help creating a heating element from resistor.
Date: Fri, 13 Dec 2002 09:40:07 -0800
User-Agent: MT-NewsWatcher/3.2 (PPC Mac OS X)
In article ,
> Sam Nichols wrote:
> > In article ,
> > wrote:
> > Good point. Well the Nichrome arrived today so we'll see what happens.
> > Which brings me to my next question, a 1A current source I can build
> > from Fry's.
> You probably want to heat a block of something with the nichrome, and then
> pass the oil through it, otherwise you'll just burn out the wire.
> What is Fry's?
> 1A current source for what, the heating element?
> You don't really need a current source for that, it'll run pretty much
> the same on a voltage source (battery), if you just pick the right number
> of turns.
Fry's is the super mega monster
computer/electronics/components/everything store, its like 3 best buys
or circuit citys stuck togeather with 2 radio shacks inside. I tried
out the Nichrome and it worked!... kinda. I have a 3/4" length of very
small copper tubing. I wound some 36 AWG in and out of it about 10-12
times and plugged it in, got up to 300 deg F. but as you suspected once
I poured some oil over it the temp dropped, it did smoke though! So
then I tried 5 wires each wrapped twice through the tube and it got up
to about 220 so no smoke, but I did learn that you want longer wire for
more heat :)
What would you suggest to wrap the wire around? Should I get one of
those ceramic resistors that are rectangular and about the size of my
pinky. I could gut out the wire for the oil channel and wrap wire
around the ceramic...