| This little circuit is for all cases where you can not hear the doorbell, for whatever reason, but would still like to be alerted if som...
More about Doorbell (13)
| The tester generates two different signals for checking a digital storage oscilloscope. The first is a stepped voltage on to which glitche...
| It is often not possible to put a second bell in parallel to the existing one, because the bell transformer is normally already fully loa...