Running out of GPIO pins? Learn how to connect multiple buttons to just one Arduino pin using clever wiring and resistor ...

Arduino Analog I/O Multiplexer. 15 Comments . by: Al Williams. June 9, 2018. ... and then just change A0-A4 to select the input. Of course, with 500 input and multiple of these chips, ...

I went a step further and bought 20 extension cables from China for ~$2 each. I snipped off the “wrong” end of the cable with about six inches of wire (in case I wanted to make a control someday).

It is equipped with 32 Inputs (16 x digital 4-30V, 8 x analog 0-10V, 4 x analog 0-5V, 4 x analog 4-20mA) and 20 Outputs (8 x relay 250V/5A, 2 x open-collector 30V/1A, 8 x analog 0-10V) and offers ...