[Hallicrafters] Wanted: circuit

[Rodney Bunt]

Do this, use a three terminal regulator and wire it like a constant current source.

        +-------+
        | LM317 |
0-------+       +------------+--------0
        |       |            |
        +---+---+            |
            |                |
            +---/\/\/\/\/----+

                  1.2 Ohm

This will give you a constant 1amp output. put this into you resistor that you want to measure.
Using a digital meter, 1mV = 1m Ohm or 1v = 1 Ohm

Rodney
VK2KTZ



--- k6uuz at juno.com wrote:
> Hi all; 
> 
> Does anyone have a circuit for a low reading ohmmeter? I need to measure
> resistance from 0 to 1/2 Ohm. If I was an engineer instead of a
> technician I could probably design a bridge followed by an op-amp as a DC
> amplifier. Also, the meter needs to be 50 feet from the point being
> measured. Any help will be appreciated. Thank you.
> 
> Ed Richards K6UUZ
> 
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