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Yes i have connected all anode to Vcc 12V with 120ohms.Why didn't you use the constant current device... The ULN2003 sinks current when you switch on the darlington's inside they will provide a negative output..
If you are driving each LED string directly, you need individual current limiting resistors for each string of LEDs.Hello,
Just now i used CD4511 with 2 series 120ohms to drive single led at output.
the vcc was 12V, voltage across 120+120 was 8 V the leds 2V but how the CDVcc and gndd was showing 2V not 12V supply??
should i connect the series resistance indival at all segment pin??
So the LED string isn't a string but a simple 7 segment display??Hello,
What are you saying man, I am not using ULN2003 or other.
CD4511 directly to 12V and input and pull down resistance of 10K both!