Steve2381
Senior Member
Hi all. Not done a project for a while, so time for some late nights...
Digging around the workshop I found a huge pile of very nice common anode quad 7 segment displays.
I had a quick go at wiring and programming a multiplexing circuit to control one of these (40x2)... but it wasn't all that successful. I just could not get a decent refresh rate across 4 digits and the display was constantly dim.
I am sure my terrible code could be improved upon, but by the time I add in all the other parts of my clock project (hence the 40x2) it just isn't going to work.
I have used a Max7219 for a common cathode clock before.... any suggestions for a common anode?
Apparently I can use a Max7219 to run a common anode display, but it loses some functionality and is a bit of a pain to program.
The other option is to use 4x 74HC595 shift registers, but then my component count and wiring starts to mount.... oh, and I don't have any!
Just wondered if anyone had any other IC suggestions
Cheers
Digging around the workshop I found a huge pile of very nice common anode quad 7 segment displays.
I had a quick go at wiring and programming a multiplexing circuit to control one of these (40x2)... but it wasn't all that successful. I just could not get a decent refresh rate across 4 digits and the display was constantly dim.
I am sure my terrible code could be improved upon, but by the time I add in all the other parts of my clock project (hence the 40x2) it just isn't going to work.
I have used a Max7219 for a common cathode clock before.... any suggestions for a common anode?
Apparently I can use a Max7219 to run a common anode display, but it loses some functionality and is a bit of a pain to program.
The other option is to use 4x 74HC595 shift registers, but then my component count and wiring starts to mount.... oh, and I don't have any!
Just wondered if anyone had any other IC suggestions
Cheers