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URC 7880 Pin configuration and SH-U09G cable

 
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cstocksd



Joined: 09 Feb 2024
Posts: 3
Location: US

                    
PostPosted: Thu Feb 15, 2024 9:15 pm    Post subject: URC 7880 Pin configuration and SH-U09G cable Reply with quote

I purchased and installed the driver per the instructions that came with the SH-U09G USB Cable. Ready to give RMIR a try but need to understand:

1. what are the pin descriptions on the 7880 and
2. Pin 1 is not identified on the board. (there is a white dot next to one pin... it that #1
3. have seen posts that indicate to take the batteries out and some to leave them in... which is it for the 7880

what other really stupid thing have I forgotten?

Many thanks!!
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mathdon
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Joined: 22 Jul 2008
Posts: 4522
Location: Cambridge, UK

                    
PostPosted: Mon Feb 19, 2024 1:05 pm    Post subject: Reply with quote

The pin marked with a white dot IS pin 1. The pattern for the remaining pins is

2 4 6
1 3 5

You will see it in this orientation when looking at the back, laid horizontally with the top end on the left. You leave the batteries IN when using RMIR.

I see that your cable has individually labelled separate leads. You only connect four of the pins:

2=RTS 3=GND 4=TXD 6=RXD

Hope this answers your questions.
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Graham
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cstocksd



Joined: 09 Feb 2024
Posts: 3
Location: US

                    
PostPosted: Mon Feb 19, 2024 10:20 pm    Post subject: Reply with quote

Thank you sooo much for the assist. While my Mom doesn't know yet, but she thanks you too!!

I'm trying this tonight!
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