Decoder Kit, Discontinued
You can strap the TT-7 for
detection of any single digit, including the secondary A, B, C, D digits.
When the decoder detects the selected digit, it will provide a closure to
ground for driving a relay, lamp, sounder, or other such load of up to 20 mA. A commercial central office quality decoder IC chip is used, making
the TT-7 extremely reliable, fast and sensitive. You may connect the TT-7
directly across the speaker or detector output on any receiver, and in
fact, we even detail how it may be connected directly to a telephone line.
We designed the TT-7 to be small enough (about 2 square inches) to fit in
many radios for easy installation. If your needs are simply single
function remote tone control, the TT-7 is for you. Runs on 5VDC.
Size: 1 1/2" x 7/8" x 2 1/4".
Decodes DTMF Touch Tones from telephone, radio, etc.
20mA output drives relays, LED's, digital devices, etc.
quality decoder with stable crystal control
0 thru 9, *, #, A, B, C, D