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Originally Posted by leejsmith
Incoherent, I have one of the 3118 kits and sucsessfuly put it to gether. I have tried getting it to monitor the volts through a 10k POT so i can adjust the volts but in the software it never changes. If i remove the power the software then shows a drop down to 0v.
Could you do a simple 3118 for dummys guide like me ? All i want to do is data log my cpu , vga , water in , water out and case temp. I dont need to be as precise as your system just to get a good idea of whats going on.
I have 100k bead thermisters for probes left over from a joystick port temp reader project will they be ok.
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How are you wiring the pot? This might be stupidly obvious but, One end should be at +5V, the other at ground (0V) and you should monitor the voltage at the wiper.
The 100k bead thermistors should be fine.
Put them each in series with 40k resistor a between the +5v and 0v with the thermistor closest to the +5v and monitor the voltage at the connection. The curve will look something like the attachment. To reduce the linear temperature range increase the resistor value.