Document Type

Master's thesis

Date of Degree

2011

Degree Name

MS (Master of Science)

Department

Electrical and Computer Engineering

First Advisor

Anton Kruger

Abstract

A two-wire, low component count soil temperature sensor was developed. The sensor uses one wire for ground and the other wire is used for both power and communication. Pulse width modulation is used to send temperature measurements to the master, where the duty cycle is proportional to the temperature. The sensor parasitically powers itself from the bidirectional data line. In order to reduce the number of components necessary, a microcontroller with an internal temperature sensor is used. Finally, the sensor can receive data from the master on the bidirectional communication line, which is used for calibrating the sensor.

Pages

xi, 74

Bibliography

73-74

Copyright

Copyright 2011 Nicholas James Sitter