I won't use an arduino
Hello, I have been working on a project. It's a ribbon cable tester up to 40 pins. So I will need 40 inputs and 40 outputs. I will compare inputs' and outputs' state to test if the cable works. How can I achieve this? I guess I am going to need some shift registers and multiplexers. If so, which IC's do I need to use?
Cheaper tester would be to simply have voltage go down one pin, feed back via next pin and repeat.