For more information including Source Code:
http://arduinofun.blogspot.com/
Video is a brief demo of a portable iButton data logger programmer using Arduino Pro Mini and DS1994 iButton real time clock. Purpose of the device is to start / stop data logging missions and monitor the last data point in the field without a lap top. One wire temperature sensors are also supported for real time measurements in the field.
I used a non-rechargeable 9V Lithium battery which provides plenty of run time. A voltage divider circuit is used to monitor the battery
jmarduino 1 year ago