PT-100 Voltage converter

176

03:47:05

This circuit convert PT-100 temperature sensor resistance to voltage.
LM324 as a Operation Amplifier
PT-100 (0 type)resistance :100-175Ohm (0-200C)
LM324 Voltage Out: 0 - 4.92V
You can monitor voltage in Arduino controllers.

published 9 years ago

hurz

9 years ago

Take care, LM324 is not s rail2rail opamp. With 5V supply its output is in a range of only 400mV to maybe 4V or even lower, as far as i remember. Check the spec or even better use another better modern opamp.

hurz

9 years ago

I checked TIs spec and the high level is typical Vcc-1.5V so with 5V supply you can only expect a proper working behavior till 3.5V output voltage. The good thing, the low level output is much better then i had in mind, its about 20mV.

DeepSky

9 years ago

What kind of opamp do you prefer for this circuit beside LM324 ?

hurz

9 years ago

LT1638

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