On Sun, Jul 20, 2014 at 7:07 PM, Al Wolfe <[email protected]> wrote:
> > Seems like there are IC's that contain two diodes, one as a sensor and one > as a heater. Part numbers escape me now. You might mean the TMP36 family of sensors. They use diodes and must be the most common sensor out there. They are cheap and ultra-easy to use. But when I tried to use one to measure an FE5680 Rubidium oscillator I got a LOT of noise. I had to take ten or more reading and average them. Then I use shielded cable and place an RC filter near the sensor with only slight improvement. Likely I'm still making some kind of design error. But I moved on to one with a digital I2C output and it worked better. I was trying to moderate the fan speed to keep the Rb at constant temperature. The fan controller works well enough now. Here is a really good write up from the place I bought mine from tmp36-temperature-sensor/overview <https://learn.adafruit.com/tmp36-temperature-sensor/overview> -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
