Read Digital icon Read Digital Read TTL digital input from an ARC I/O port; real-time red/green status for low (0V) or high (+3.3/5V), selectable board/port and read interval. Try it →

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#1  

I have two of them on my bot. You have to use one D point each. If you look at my project under the project show case Unfinished, Experiment 626,you can see the two units. Some have said to run with out the jumpers but I run mine just fine with them in.. you need to use a modified servo panel to move them.