short circuit protection with one wire ds18b20's
I have one ds18b20 in the ground/soil and another one in an outdoor pond - I would expect that some day they will shortout...
I couldn't find anything in:
A google search came up with:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1161557194;start=all
"If you are going to have any kind of wire run I would suggest looking at some of the ESD protection variations (resistor in series with IO pin and 5.5v Zener diode to ground) to keep the stress down when bad things happen."
So the resistor and zener diode looks simular to one of the three methoids in the grumpy_mike
http://www.thebox.myzen.co.uk/Tutorial/Protection.html
I run 5v, gnd, and input (all from the arduino pins - power from 9v wall wart to arduino) to each one wire sensor with 1k between the 5v and input.
what are other's using and found to work for short circuit protection with one wire networks
thanks