On 03/01/2018 20:46, JAB wrote:
On Wed, 3 Jan 2018 19:53:01 +0000, wrote:

I didn't explain that well.

Well, try something new

Crank Doorbell Circuit Schematic

http://www.electroschematics.com/6304/crank-doorbell/


Not quite in keeping with the application, which is almost identical to
this: https://www.youtube.com/watch?v=VNZxBMfUmZ8. Each call button is
wired in series with an electromagnetic and then with the bell. The
electromagnet waggles a flag in a window to show which room has called