Grumpy_Mike:
What! You have some medical problem that prevents you from using certain components?
So what has multiplexing got to do with this?Just connect an output to each of the pins you want to control and turn them on and off. Then use a FET to turn on your valves for the output pin signal.
Nope, just that my boss don't want us to design any PCB. He prefer using finished products like Arduino and I can't find any module for 8 bit latched in my area.
My output is controlling relay. My main microcontroller has limited output. So, plan to add Arduino to serve as a 4 to 15 multiplexer with latched function.
In terms of coding, do you think switch case is good for my application?