It's amazing for us to hear from customers all the
imaginative applications they have put the TD-2 to work in!
Originally designed primarily for use with the AP-3 Autopatch in
repeater installations, the TD-2 has found a wide array of uses
in scientific and commercial projects to turn things on and off
and to manipulate machines.
Among the most often mentioned uses are turning motors on and
off from miles away, for example, at pumping stations. Another
common application is to control pan, tilt, and zoom on TV
cameras for surveillance and security. The TD-2 has even been
used by TV networks covering events, such as the eruption of Mt.
St. Helens many years ago.
Virtually anything which can be turned on and off or
controlled by a momentary signal can be operated from miles away
via phone or radio link. You are limited only by your
imagination!
FEATURES:
- Central-office quality, 16-digit, DTMF (touch tone)
decoder.
- Built-in filters to prevent falsing.
- Crystal controlled, no alignment required.
- Codes easily changed with jumpers; no program plug or
prom burning needed.
- 5 latching outputs (open collector transistor) can drive
solid state circuits directly or drive small relay to switch
power loads.
- Up to 12 momentary outputs (5V CMOS)
- For each function, you have the choice of using a
high-security four digit password or convenient single digit
operation.
- Can be used with any tone source: primary or aux.
receiver or phone line (with autopatch). 100 mV to 2V p-p
audio input range without adjustment.
- Can be used for remote control of repeater, autopatch,
subaudible tone board defeat, selective calling, telemetry,
industrial control, etc.
- Built-in 0&1 toll call restrictor for use with
autopatch. By itself, a toll call restrictor used to cost
$79!
- For security, a "tone mute" signal prevents
retransmission of tones on a repeater when an AP-3 autopatch
module is used.
- Low power consumption CMOS circuitry; only 15mA at
10-15Vdc.
- On-board LED status indicators for testing, can be
extended to panel.
- Small size: only 3 x 5 inches
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PRICES:
TD2 Tone Decoder/Controller kit $99
TD2 Tone Decoder/Controller wired/tested $139
Shipping weight 1 lb.
A95 Solid State Relay to switch
115Vac up to 10Amp $29.50 (Handy for turning
equipment on and off by remote control. Ask for
instructions on how to connect it to TD-2.)
A Note From Our Engineering Notebook --
How to control equipment over a phone line.
Often times, it is necessary to control machinery
from a considerable distance, and a phone line with dtmf
tones is a very cost-effective way to do it, providing
you don't need to pay for a leased line.
A good way to accomplish this is by using the TD-2
along with an AP-3 Autopatch module. The AP-3 monitors
the phone line at the site with the equipment and
automatically answers the phone line when it rings. It
then couples any audio on the phone line to the TD-2.
To turn something on or off, you merely call the
remote telephone line and send your touch tone commands
with the tone pad on your telephone.
The AP-3 maintains the connection to the phone line
for one minute and then hangs up. If you need more time
for control, you can send a touch tone command to "turn
on" the autopatch, which keeps it connected until you
send another command to turn it off.
If you have an audio source at the remote site you
want to listen to, it can be coupled to the phone line
through the AP-3 in much the same fashion as the
receiver in a repeater.
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