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automatic college bell

Wouldn't this be better posted in the Microcontroller section the the forum?

Ken
 
yaar in whatever section it is in.. question is question... i was in hurry so..
if anybody knows the answer then please help me out.. its very urgent...
 
How do you expect the displays to work?????
Every time you illuminate an extra pixel, the brightness will alter.
No-one is going to even start to write the code for a messy circuit like this, for less than $1,000.
 
Last edited:
Since you're apparently scanning the display digits, per colin55's comment, you need to remove the 330Ω resistors from the emitters, and place seven of them in the segment lines.

ken
 

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