muthumani
Newbie level 6
Created six digit LED seven segment display with 8 leds per segment. Totally used 8*7*6 = 336 LED's. Connected all 'A' segment, 'B' .... 'G' and connected to MAX7219.
Used DS1307 (RTC) and read using 89s52. The problem im facing is if i enabled set segment 1 with value 1 means im able to see 1 in all the other seven segments also.
Connected 1k resistor to base of transistor (BC148 for driving segment) and 470k to base and grounded (This is because 4 leds are serially connected, so need to drive +12V).
Connected 1k resistor to base of transistor (SK100 for enabling segment) and 470k to base and +12V.
Please suggest me to come out of this ghost image issue... Thanks
Used DS1307 (RTC) and read using 89s52. The problem im facing is if i enabled set segment 1 with value 1 means im able to see 1 in all the other seven segments also.
Connected 1k resistor to base of transistor (BC148 for driving segment) and 470k to base and grounded (This is because 4 leds are serially connected, so need to drive +12V).
Connected 1k resistor to base of transistor (SK100 for enabling segment) and 470k to base and +12V.
Please suggest me to come out of this ghost image issue... Thanks