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Index > MobiFlight Hardware & Firmware > Max7219 - 3 and 2 digit 7 segment connection problem
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Message #27883
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dolino2215
Posts: 3
Helloo all,

I received a led display, 2 and 3 digits, and I need them for the cockpit to display altitude and vertical speed.
I put 3 digits in the first part of the max7219 tube, and 2 digits in the second part. The first part works fine, the second part I can't get it to work properly. I connected the 2 digit display according to the pinout I could find. Whatever I tried was no good. Does anyone have a scheme on how to connect it, or if someone knows a solution, please help me.
Thanks in advance.

2023-06-22 13:14
Message #27884
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Hekla
From: Denmark
Posts: 20
What do you mean by 1st and 2nd part of 7219? And please provide a schematic of your setup.

br,
Leif
FSX/PMDG on WIN7
Usually fly online as 1W4C
Does NOT use the privacy-violating DISCOGS.
2023-06-22 15:00
Message #27885
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Hekla
From: Denmark
Posts: 20
1. you switched D1 and D2
2. you have to back track your a-g and dp wires(dp not needed though). It would be awild guess where you made the mis-wiring.
3. I wouldn't make a 'space' between segment 3 and 4. But I make my own boards any way.
FSX/PMDG on WIN7
Usually fly online as 1W4C
Does NOT use the privacy-violating DISCOGS.
2023-06-22 15:42
Message #27886
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dolino2215
Posts: 3
I have made mistakes. I was use paper with wrong pinouts. Everything working now. Thank you for your help.
2023-06-22 15:48
Message #27887
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dolino2215
Posts: 3
This is correct pinout

2023-06-22 15:55
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Index > MobiFlight Hardware & Firmware > Max7219 - 3 and 2 digit 7 segment connection problem