- #1
scott_alexsk
- 336
- 0
Hello,
I have been working on a circuit to measure the resistance change of a wire vs. temperature, as to glean information about the internal phases. The changes in resistance I am dealing with are only about 1 ohm.
Is there any standard system for grabbing such a small resistance? Currently I have a computer interface that hooks up to the usb port on my computer, and can take analog inputs ranging from 0-5 volts.
I am working on a setup w/ a difference amp, to amplify the difference between a small preset voltage, and the voltage being dropped over the wire, but is there a better way? Please note that I do not need the actual resistance, but just a good relative measurement to mark the phase changes.
Thanks,
-Scott
I have been working on a circuit to measure the resistance change of a wire vs. temperature, as to glean information about the internal phases. The changes in resistance I am dealing with are only about 1 ohm.
Is there any standard system for grabbing such a small resistance? Currently I have a computer interface that hooks up to the usb port on my computer, and can take analog inputs ranging from 0-5 volts.
I am working on a setup w/ a difference amp, to amplify the difference between a small preset voltage, and the voltage being dropped over the wire, but is there a better way? Please note that I do not need the actual resistance, but just a good relative measurement to mark the phase changes.
Thanks,
-Scott