Making the 7-hex brighter Everything seems to be working great while building the 8-bit computer and I just finished the output display. The numbers though seem to be too dim, even while doing a low frequency refresh. 

Is there a way to make it brighter?

One thing I found out to make them brighter, but not sure why it works and whether it will break something, is to connect a resistor between power and the outputs of the EEPROM.  

Any suggestions? Am I doing something wrong?