January 27, 2023, 06:39:45 am

MOD-IO Newbie Question

Started by TemperedEnt, June 24, 2015, 12:39:55 am

Previous topic - Next topic

TemperedEnt

I want to run an input for the olimex mod-io through a limit switch. This would be like the wall switch in a house.

Can I just run power to the limit and into the MOD-IO and read the input? Or does the electronics have to be different?

TemperedEnt

Maybe I should ask another way..?

Does anyone have an electrical diagram of how to wire up a wall switch to this board?

MBR

Maybe I'm a bit confused, but do you want to just read the state of a single switch? The optocoupler inputs of the MOD-IO behave just like a LED with built-in 3.9K resistor and antiparalel diode (as voltage revelsal protection), but for a single digital input, you can connect the switch directly to the SoC GPIO input (with configured pull-up resistor and maybe with some aditional protection against electromagnetic interferences), without the MOD-IO.