Application Notes for the CircuitWerkes DTMF-16
listens to an audio source (practically any audio source)
and activates its appropriate output when it hears any one
of the sixteen standard DTMF tones.
can operate in one of two possible modes: momentary or interlocked-latching.
In momentary mode, the output stays on for the duration of
the incoming tone. Interlocked-latching mode keeps the most-recently
selected output on until a different DTMF tone is entered.
The units are shipped from the factory set for momentary operation
but can be changed to interlocked latching by moving one internal
The outputs are opto-coupled Darlington transistors.
They are capable of operating practically
any computer or logic input. They can be
used to source or sink current (up to 150mA),
making them ideal to drive slave relays or
be used in place of relays in most DC applications.
Here's what some users are doing with their
Automation Tones from radio networks (connected to satellite
receiver) and interfacing them with your automation system.
transmitter control over STL, radio, or telephone coupler.
remote control of camera pan & tilt heads.
/ Computer control over telephone or radio link.
- Firing cart decks / digital recorders in
studios (simultaneously muting audio channel)
from remote location.
an attention light at a remote broadcast via FM subcarrier.
outdoor billboard control via FM subcarrier.
control via radio link. Online control of RPU gear and radio
is a registered Trademark of AT&T