Harry Bloomfield wrote:
Dave Liquorice expressed precisely :

Does anyone know of a sounder suitable for mains use that won't deafen
people within 10 yards. Ideally all I want is quiet beep 15 sec pause
beep 15s and so on.

Mains powered ones tend to be robust and er, well, loud.

Why not find what you need in a low voltage version and feed it from a
small wall wart? 12v output wall wart connected to a vehicle reversing
alarm perhaps.

Other option is put silicone in the sounder housing of a 240v one.
Not very elegant, but kills resonance.


NT