| This circuit was designed to produce an audible alarm when the mains power is interrupted. Such an alarm is essential for anyone whose livel...
All items tagged with Alarm and main (3)
| by A Treps This circuit was originally developed to detect and signal interruptions of the mains supply to artificial respiration systems. T...
| alarm extension ... The garden party is in full swing .. . Amidst all the happy noises and chatter it is difficult to hear when the telephon...