7447 bcd

[kelangfei]

Hello:

I have a 7447 (sn74ls47n texas instruments) working with a common anode 7 segment display but only in lamp test mode. I cannot seem to get it working for the numeric display combinations. I have read the datasheet concerning bi/rbo and rbi but still ... nothing.

Any clues?

 

[Analog]

post a schematic.

 

[kelangfei]

see the problem

Problem is solved. Just need to read the datasheet a little more closely. Thanks anyway