John Besley
New Member
I am building a door entry system operated by a push button to alert the door keeper by a set of two colour LED's the door magnet will be released through a radio fob. how ever I need a gizmo that will keep the LED from the bell push lit as follows;-
System powers up through a key switch when the room is in use with a red LED showing.
Bell push activated, turns the LED green (when the bell push is released the LED goes back to red)
What I need to do is keep the LED lit as green for around 120 seconds after the bell push has been released.
There must be a module out there that I can wire in to do this
System powers up through a key switch when the room is in use with a red LED showing.
Bell push activated, turns the LED green (when the bell push is released the LED goes back to red)
What I need to do is keep the LED lit as green for around 120 seconds after the bell push has been released.
There must be a module out there that I can wire in to do this
