Here is a quick a post on how to test the Dual Counter.
You need the following connections to the Dual Counter:
- The 1-Wire data line to DQ
- The 1-Wire ground to GND
- A piece of wire connected to +5v (no external +5v is needed)
Start up the OneWireViewer and get to the Memory tab of the DS2423. Make a note of the number highlighted in the picture below (green for input A, yellow for input B ). Now touch the wire connected to the +5v terminal to either the A or B input a few times, when you are done with that click the refresh button at the bottom of the page. After it has refreshed the numbers highlighted should have changed. If it didn't change then you may have a bad Dual Counter.
Eric