As a total newbie who wishes to use a pi zero wireless to sense a door bell push, is the Automation pHAT a viable solution?
I understand a cheaper solution would be an opto-coupler, but was wondering if this would also be a simpler solution to a newbie?
Its an old fashioned UK door bell button, linked to the usual transformer and chime box
Any advice would be appreciated
UPDATE: think I’ve made the newbie mistake of assuming a relay works both directions. I’m now thinking the relay only works in one direction, DC > RELAY > AC?