I just got my sensors in and I am all excited to try them out and then I realized “I don’t know enough about electronics to understand the jargon!”
Going from this (http://wiki.tinyclr.com/index.php?title=OneWire_-_TempSensor) I know I need a 1k (ohm?) resistor (which I have).
but then reading this
[quote]The bus master needs an open drain pin with a pull up resistor. Do nto worry about this as GHI take care fo the “open drain” configuration on any of the processor pins. All you need to do is add a pull up resistor, a 1K reistor is recommended.[/quote] I realize I don’t know what “Open Drain” means, nor what “Pull Up resistor” actually means. So I found this (http://stuff.nekhbet.ro/2009/08/23/how-to-use-the-ds18s20-and-ds18b20-temperature-sensors-with-arduino.html) (for arduino) article which has a nice schematic. This schematic appears to have (what I am only guessing at) an “open drain” which apparently I do not need to setup.
So, do i just stick my resistor on DI9 and hook that to Pin2 or Pin3 (of the DS18B20), then hook Pin 1 (P1, on the DS18b20) to ground. What do i do with the 3rd pin?