EXECUTIVE SUMMARY: Using the updated Arduino 1-Wire library code presented here, you can eliminate the need for an external pull-up resistor for typical small networks of DS18B20 temperature sensors.  This should also work with any AVR processor and other types of 1-Wire devices as well. You can download the updated 1-Wire library here… https://github.com/bigjosh/OneWireNoResistor/archive/master.zip The … Continue reading Save the Earth One Resistor at a Time – External pull-up resistor no longer needed for DS18B20 temp sensor