No, just wound it crudely.  I always try the crudest, simplest way first.
;-)

I've since come up with a much better sense resistor material.  Contantan
(the red wire in a Type J thermocouple) has a nearly zero temperature
coefficient (+/- 20 ppm/0C), and high resistivity.  I just happened to have
a type J thermocouple laying around.  0.357" of 24 gauge Constantan gives a
nice 0.025 ohm resistor, just a straight wire, no coils.  I soldered it into
a 4-wire resistor configuration, so's I could measure it with a 4 wire
ohmmeter, and I think I'll use it that way, too, in the real circuit.


So how do you wind non-inductively?  Reverse the direction of winding
halfway through?

-- Lawrence Lile
P.S.  This is a sense resistor for a current measurer for a constant current
supply for a NiMH battery charger for a mowbot with PIC for brains, if
anybody is just tuning in.


----- Original Message -----
From: "David VanHorn" <dvanhorn@CEDAR.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, May 18, 2001 1:43 PM
Subject: Re: [EE]: NiMH batteries


>
> You did wind it non-inductively, right?
>
>
> --
> Dave's Engineering Page: http://www.dvanhorn.org
>
> I would have a link to FINDU here in my signature line, but due to the
> inability of sysadmins at TELOCITY to differentiate a signature line from
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>
> --
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>

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