Assuming the following circuits have been implemented:
A counter circuit that counts from 1 to 9,
A seven-segment display decoder circuit.
How should you design to display the counting result on the seven-segment display?
By making a slight modification to the "show-counter-on-7-seg" project, you can replace the manual AN signal input with an AN controller circuit.
This project demonstrate a circuit that can capture external hex input and show the results on the 7-segment display.
This example demonstrate how to use mux to select different tone to the speaker.