i tried to lid up 8 (Digit) common anode seven segment jumbo display (4" size)using pic 16f877a micro controller in master and slave mode.
i used uln2003 for drive the segments and tip127 for source drive from controller.
every things ok when i lid 4 digits. but for all the 8 digits, the brightness reduced to half as before.
i am using PC SMPS 12v 5a rating.
please guide me solve the problem
i used uln2003 for drive the segments and tip127 for source drive from controller.
every things ok when i lid 4 digits. but for all the 8 digits, the brightness reduced to half as before.
i am using PC SMPS 12v 5a rating.
please guide me solve the problem