Well im kind of new to electronics, and I tried making this circuit here:
http://www.allaboutcircuits.com/vol_6/chpt_7/9.html
but since I didnt have a 4511, I replaced it with a 7447, using this datasheet here:
http://pdf1.alldatasheet.com/datasheet-pdf/view/80216/NSC/7447.html
to replace all the wires correctly. However, it didnt have an (LE)latch enable, but an (RBI)Ripple blanking input instead... Its also TTL, not cmos, but i figured it would still work... Is there ANYTHING im doing wrong? I made sure all the connections are right, tested the led display, (Which is the exact one the tutorial used), and already tried 5 different 7447s... And by the way, the problem is nothing lights up unless I put the Lamp Test on low and the Blanking input on low, then everything lights up...
http://www.allaboutcircuits.com/vol_6/chpt_7/9.html
but since I didnt have a 4511, I replaced it with a 7447, using this datasheet here:
http://pdf1.alldatasheet.com/datasheet-pdf/view/80216/NSC/7447.html
to replace all the wires correctly. However, it didnt have an (LE)latch enable, but an (RBI)Ripple blanking input instead... Its also TTL, not cmos, but i figured it would still work... Is there ANYTHING im doing wrong? I made sure all the connections are right, tested the led display, (Which is the exact one the tutorial used), and already tried 5 different 7447s... And by the way, the problem is nothing lights up unless I put the Lamp Test on low and the Blanking input on low, then everything lights up...