Temperature probe options

[Michael]

I have a lot of an old PIC, the 16C72 and may use them in a temperature switch. I know the ADC is 8 bit but don't need real high accuracy in the readings.

What would be my best options (or maybe my only options), for a ready made temperature probe? I see some on Ebay -- one that is LM35 based and another DS1820. Others ?

Never messed around with temp sensors at all before. I do see some ready made code (or adaptable) for the DS1280 in the example programs.

Thanks kindly.

[richard]

What would be my best options

LM35 output 10mV / deg , 8 bit ADC @5v is 20 mV / count , that's a pretty chunky result . 4x oversampling could help
if you need to measure below 0c a neg voltage source is req.


DS18S20 code is subtlety different to DS18B20 code , watch for that . either will measure sub zero C temps
{I find if parasitic power not used and/or conversions are frequent they can self heat giving false readings unless well heatsinked }

a DS1280 is part of a mac truck

[Michael]

Ok -- yes, seems the DS1820 is the current "best choice". Thanks.