On May 6, 6:46 pm, Owain <
spuorgelg...@gowanhill.com> wrote:
> On May 6, 3:45 pm, David P wrote:
>
> > Mum has just bought a new flat and is finding that the buzzer on the
> > intercom in her flat from the main door is not quite loud enough for her
> > when she is in the living room, particularly whilst watching TV.
>
> > I have no experience of such systems whatsoever and wondered if there was
> > a simple way to either increase the volume or, alternatively to have an
> > additional buzzer sound in her living room?
>
> depends on the system, but most use small AC buzzers similar to
>
>
http://www.videx-security.com/products/door-entry-systems/traditional...
>
> *most* will supply 2 or 3 buzzers in parallel. You might want to
> rectify the AC and use a more melodious DC sounder that has a lower
> current draw eg
>
>
http://www.videx-security.com/products/door-entry-systems/traditional...http://www.doorentrydirect.com/videx-extension-sounder-12v-ac-creates...
>
> some systems use an audio tone call and they would require an
> extension speaker - and not all systems would support this.
>
> If you can identify the make of the system that would be helpful.
>
> Entryphone(tm) suggest using a small friendland bell or buzzer and
> I've used a friendland ding-dong on an intercom system. Although the
> system supplies 12V and the bell is rated for about 8V the rings are
> usually of short duration so both bell and power supply cope.
>
> Owain
If its an audio tone of some sort fed to a speaker, you can always
connect a computer speaker to it, even if you cant connect a regular
passive speaker. You may need to use a resistor or 2 to reduce the
voltage into the pc speaker.
NT