Maxim 7219/7221 connecting to 7 Segment and LEDs

[Mani5678]

Hello All,

I will be very grateful , if someone can provide me some insight on this.

I have seen Schematics of hooking up Maxim 72xx to a set of 8, 7 Segments displays or a 64 LED matrix.

This link can be used for additional information.

http://wayoda.github.io/LedControl/pages/hardware.html

I am using 2 of BC-56, 7 Segment displays, They have 3 digits each.

I have no problem displaying digits on them using LedControl Library, setDigit function.
Row (1-6) are used as 6 digits.

Theoretically , I should be able to control 16 more LEDs, with the same Driver
They are hooked as shown in the Schematics. (on Row 0 and 7)

Please Guide me, if it should work? I need to be able to control each of 16 Led individually,
I am using these functions to control row 0 and 7,

setRow(0,0, B00000000);
setRow(0,7, B00000000);

But I am seeing some troubles, More or less LEDS will light up.

[Riva]

The wiring of the 16x LED's does not look correct as your doubling up LED segments that are connected back to the same digit. I think it should be like below.

[Mani5678]

Really appreciate your help Riva, I see what I did wrong.