I am trying to control four display LED 7segment 4" (101mm) FYS-40011AUHR-21.
I am finding very difficult to control it, using the MAX7221 or plug each single segment to arduino output pin (with resistor from 200ohm to 1kohm) but nothing the segments always are off, only the DP i can turn on.
Also i am trying with voltage from 1.5 to 2.5 (wihout arduino) direct to display segment but always off (only DP works).
Maybe it is a big display and need more component or a specific controller?
Please any can suggest me how i can control it.
I attach the datasheet of this display.
FYS-40011AUHR-21.pdf (412 KB)