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You mean somethinng like this?...

Hello everyone,
i'm on a testing stage on my hardware for a diy cnc mill.
I'm facing some issues connecting my end-switches to the cnc shield.I have to say that they used to work last week, but now...

Thanks for the reply!
I did check that and if i get it right one of the two pins, for each end switch on the cnc shield, is the ground.
In theory if i plug two wires in the x+ pins and make them...

*UPDATE*
In the cnc shield v3.0 the z limitt switch pins are on the SpnEn pin due to a chage on the arduino side.
If i connect the z limit switch to the SpnEn pins it works as expected, but still...

After further investigations i found out that those pins on the shield( limit-switch pins x+ x-y+ y- z+ z-) output just 0.3v while the one is workig is near 5v(4.75v), and also checked on the arduino...

Hello,
i have solved this with a new arduio one board, just tested and all end switches works properly, so i think the old arduino board was faulty.
Can you explain how to protect from spikes?so i...