What's the 16-bit value shown?
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0000 0000 0000 0000Originally Posted by Bruce
zeros across the board with no change to heat
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Is the thermocouple a K type?
The code given in the link I gave works.
Check the hardware. Bad connections or backwards connection on the thermocouple or wrong type will cause problems.
Dave
Always wear safety glasses while programming.
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Both the thermocouples I have are K type and are connected properly. The ground lead on the thermocouple is tied to ground as well as the negative input on the MAX6675 as demonstrated in the datasheet. I did a continuity test on all wires coming from the chip and they're all good.
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is the code you gave specifically for the 16f630?
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No. The code shows how to use the MAX chip.
Dave
Always wear safety glasses while programming.
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i found in this post (http://www.picbasic.co.uk/forum/show...1178#post71178) that you stated you need a temperature
reference for every time the wire material from the thermocouple changes.
I had copper wire soldered to the terminals on my thermocouple. I disconnected the copper wires but it didn't helpAnyplace the wire material changes you need a reference temperature and calcs. A couple exceptions here and there though.
Last edited by emerson; - 10th December 2010 at 20:47.
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Did you look at the data output pin on the MAX chip with your O-scope to see if it's changing the value sent?
If you send 16 clocks, and the data line stays at ground, I would think there's a problem with the MAX IC. If you see transitions on the data line, there's something going on with the PIC side.
Last edited by Bruce; - 10th December 2010 at 19:30.
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