Hi, I'm trying to do some homework but I'm stuck. I have to design a 4 to 1 multiplexer using NOR gates. I looked all over the internet but I can't find anything. Can you help me?

 

Hello,

Take a look at this PDF:
http://www.stanford.edu/class/ee121/handouts/lect06.pdf

This is a link from the EDUCYPEDIA on digital encoders and decoders:
http://www.educypedia.be/electronics/digitalcodes.htm

There are more pages like that over there:

Digital electronics:
Arithmetic circuits D/A-A/D converters Number systems Codes and decoders Flip flops Technology Counters and registers General overview Technology-CMOS Digital logic Memories Technology-TTL Timers and oscillators

Greetings,
Bertus

 

If it helps, the first computers made with transistors used the NOR gate as the basic logic element.

Make a truth table for guidance.

 

Thanks for the links.
I have the truth table and I also made the relation(don't know if it called like that), it is Y=A*S1'*S0'+B*S1'*S0+C*S1*S0'+D*S1*S0
but I still don't know how to make this circuit with NOR gates

 

Try it with two signals and one enable bit. Build on that.