Use temperature sensor LM35 to design an op-amp circuit that will produce
temperature readings in Farehnheit
NOTE: scale factor of 10mV/degree C
Use a scaling and level shifting circuit
A resistance ratio was found with the equation above in order to figure out what values of R1 and R2 were appropriate to use for this experiment:
R1=3kOhm
R2=2.4kOhm
We then continued on to find the reference voltage
A resistance ratio was found with the equation above in order to figure out what values of R1 and R2 were appropriate to use for this experiment:
R1=3kOhm
R2=2.4kOhm
We then continued on to find the reference voltage
(The black component below is an LM35 semiconductor)
NOTE: Because the breadboard that we were using only allowed for two voltage inputs we ended up using a resistance to compensate for the extra voltage that would go into the circuit.
We looked online to check if this was an acceptable value.
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Final Circuit (with op-amp):
Vf = 6.59 mV (65.9 degrees Fahrenheit)
Conclusion: To test how accurate our experimented was we calculated % error. It was only about 10% signifying that our results are 90% good.
This was a fun experiment.
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