wizpic
Advanced Member level 3
op-amp help
Hi everybody
I need some hlep I'm palying around at the moement with a LM35 temp sensor which gives out a 10mv/°C reading so at 55°C the output would be 550mv and when it goes below 0°C the output voltage revesres so at -55°C the output would be -550mv,
I want to be able to feed this into an op-amp and start of with 2.5V which would be 0°C and the temp raises to 55°C the output from the op-amp would increase to 5V and then when the temp sensor went below 0°C the output from the op-amp would decrease from 2.5V to 0V and i want to be able to feed this into a pic to show reading's on the lcd the software side of things is not a problem really it's just how to congfigue the op-amp if it can be doen that way or would there be an alternative method, I did considor the DS1820 but not 100% sure if this will give teh correct reuslts been in the air i thought that the DS1820 was contact realted
any help or advise i would be gratefull
cheers
wizpic
Hi everybody
I need some hlep I'm palying around at the moement with a LM35 temp sensor which gives out a 10mv/°C reading so at 55°C the output would be 550mv and when it goes below 0°C the output voltage revesres so at -55°C the output would be -550mv,
I want to be able to feed this into an op-amp and start of with 2.5V which would be 0°C and the temp raises to 55°C the output from the op-amp would increase to 5V and then when the temp sensor went below 0°C the output from the op-amp would decrease from 2.5V to 0V and i want to be able to feed this into a pic to show reading's on the lcd the software side of things is not a problem really it's just how to congfigue the op-amp if it can be doen that way or would there be an alternative method, I did considor the DS1820 but not 100% sure if this will give teh correct reuslts been in the air i thought that the DS1820 was contact realted
any help or advise i would be gratefull
cheers
wizpic