Practical signal conditioning

we are going to design a circuit which can show conversion of temperature from degrees Fahrenheit to degrees Celsius.

We connected them to use the temperature sensor to run properly by 1C equals 10mV.

 degrees f to degrees c we calculated it.

This is the function transformed in therms of resistance and voltages where vf is the temperature in fahrenheit and vc is the temperature in Celsius. We calculate our resistances from a ratio of 4/5 so that means than R2 has to be 0.8 times smaller than R1.

z

We used 8.2k ohms for R2 and 10K ohms for R1 since we cannot find exactly ratio mentioned before. 

Now we have to set up the following circuit and we found V is -0.4V 

we set up the circuit and this is what we did it. We later had to do a voltage divider because V is too small to support the system and we finally get Vc =24mV and Vc=76.2mV

here is the percentage error

a 1.33% error is not a bad solution. We successfully achieved the main objective. we did this well about op amps and LM35 and we know this is very useful in our life like temperature control and science experience.