I'm required to create a 4-bit full adder (ALU actually), that displays result on 2 7-segment LEDs with both are common cathode, using only 74HC283, CD4511 and some other logic gates. I'm confused on how to get a result higher than 9, and how to separate the signal to 2 LEDs.

  • $\begingroup$ A typical datasheet for 74283 shows carry in and carry out pins. An example circuit for 4511 shows the interfacing. I suggest you build these separately and integrate when you understand how the chips work. $\endgroup$
    – Syed
    Feb 19, 2022 at 5:14
  • $\begingroup$ Use a bunch of 74LS-series digital chips. Like we did in prehistoric times. $\endgroup$ Feb 19, 2022 at 22:50
  • $\begingroup$ You need to research BCD. $\endgroup$ Feb 25, 2022 at 18:01


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Browse other questions tagged or ask your own question.