LM35 Problem
- From: "Rod'sInfoQuest" <remcg@xxxxxxxxx>
- Date: 1 Nov 2006 14:47:01 -0800
Hi,
As a complete electronics novice I am struggling to get a LM35 to work
properly. I know it should be simple but for some reason it is not
working and wondered if anyone has any suggestions. I have a string of
6 sensors with a live wire from a 9v battery connected to each via a
rotary switch. The ground goes back to the battery and I measure the
voltage between the middle pin and the ground.
The output of the 6 is different by up to 100 mV at the same
temperature. The output often seems to be around 300 mV when the
temperature is about 20 C, and only changes very slowly with increased
temperature, to the extent that I have no confidence in the output.
Could I have damaged the units, or connected them incorrectly -
currently they are not effective as temperature sensors!
Thanks for any help,
Rod
.
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