Have a look at the bottom where I put diodes in the lines. I did think about the MAX7219 for a while (since I already have the ICs) and was wondering whether I could just put some simple diodes in the digit select lines to prevent short circuit. I can't believe that it is so hard to find a driver for 16-segment displays while it is so easy to get these for 7 segment displays. That would be great but I can't find any place to buy these in the UK. This IC would do all 8 digits in one IC and even has the "font" built in. I have also found the MAX6955 or MAX6954. But this is probably the solution I would go with if nothing better comes up. That should work, but I would need 2 of these per digit, so 16 in total. Then I was looking at the 74HC595 8 bit shift register. So I can't connect 2 of these to one digit. This looked good until I realised that the 16-seg displays I have only have a single common cathode. I have found a few possible solutions but they all have some draw-backs.įirst I was planning to use the famous MAX7219. Has anyone done this before and what IC did you use? I'm having difficulties finding the right driver IC for this. I'm trying to interface 8 digits of 16-segment alphanumeric LED displays (common cathode) with an Arduino.
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