For an easy solution, us a LM34cz temperature sensor ($5.00) and connect it to 5 volts. Then connect the output pin to a digital multimeter. The voltage is proportial to the temperature and calibrated at the factory for 10mv/degree F. So: 0.00V = 0 degrees F 0.01V = 1 F 0.10V = 10 F 0.75V = 75 F 1.00V = 100 F 3.00v = 300 F (The top rated temperature). That's it. You don't need any other components unless you want to measure negative temperatures in which case you need to shift the ground reference with a couple of diodes and a resistor (as outined in the spec sheet). Cheers, Andrew From: "Picdude" To: Sent: Saturday, July 19, 2003 1:37 AM Subject: [OT]: Measuring temperature... Any of you folks have a way to measure temperature semi-accurately w/o expensive thermometers? Within a few degrees would be nice, and in the range of 0 to 300 deg F. I'm trying to test the calibration of a temp sensor for my car. I can use ice and hot water to get the 32- and 212-deg F points. But is there a way to get 1 or 2 points between that, and a couple other points up to about 300 deg F? Is there any other liquid I could boil that has some known boiling point perhaps? Cheers, -Neil. ________________________________________________ Get your own "800" number Voicemail, fax, email, and a lot more http://www.ureach.com/reg/tag -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body