I am working on a project in which I need to accept 64 ON/OFF input signals into my Raspberry Pi. Is it possible by using four 16 channel multiplexers? How?
If not, then I have found out in other questions that "It is possible to expand up to 64 additional GPIO ports using some MCP23008 chips connected via I2C interface." But I quite did not understand how to do that (PS I am a newbie). Can anyone elaborate more about it?
What are other possible solutions to accept up to 64 digital input signals?