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Topic: Zener diode on voltage divider circuit (Read 2 times) previous topic - next topic

andrewr123


dc42

As an alternative to the 12V supply + Schottky clamping diode, you could go back to using 5V and about 1K2, and amplify the output use an op amp and 3 resistors. If you use a rail-to-rail output op amp, you can convert your thermistor output to swing over the whole 5V across the temperature range of interest, which gives you 0.1C resolution if the range is 0 to 100C.
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andrewr123

Thanks DC42; I'll give the 12v approach a go first of all, but yours is a good approach if I need more sensitivity.  Thanks

sonnyyu

One of those devices will help;-

http://arduino.cc/forum/index.php/topic,149241.msg1123260.html#msg1123260

TVS (Transient-voltage-suppression diode) is my favor.

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