Controlling 7 Segment Display With a Mux

[Altera_Forum]

I'm new to digital design but I am trying to design a game. 

I need to control the output to a seven segment display using a mux. The outputs include various "letters" and numbers. How should I go about doing this? Thanks in advance!

[Altera_Forum]

Hi, 

 why a mux? What are the constraints? Since you're posting this in an Altera forum, I assume you have an FPGA or a CPLD, which typically has plenty of I/O pins.  Okay, a mux. If you're not having enough I/O, a mux can solve this. The interwebs are full of instructions; maybe not for your special case, but if you look into pages for Arduino etc., where a lack of sufficient I/O count is much more common, you'll find tons of articles, e.g.: 

• http://www.instructables.com/id/multiplexing-with-arduino-and-the-74hc595/ (http://www.instructables.com/id/multiplexing-with-arduino-and-the-74hc595/) 
• http://maxembedded.com/2013/01/seven-segment-multiplexing/ (http://maxembedded.com/2013/01/seven-segment-multiplexing/) 

 Just adapt one of those designs to your needs.  Things to consider: 

• your FPGA/CPLD board must be designed for the required DC current 
• do not violate the absolute maximum DC current per I/O pin 
• keep in mind that the supply current for the corresponding VCCIO pin(s) is the sum of all currents, which can be quite a lot 

   Best regards, GooGooCluster