DTMF Detector Kit
Details
Want a small project that costs less than £5? Here's the answer, complete with the HT9170 DTMF receiver IC.
Three input configurations are possible: un-balanced audio, balanced audio and microphone.
Outputs
The 4 binary outputs of the HT9170 together with the data valid (DV) strobe, output enable input (OE) and power connections are all available on the 8 pin connector.
If you do not require output enable just link it to the 5V pin. The kit will work on 3V to 5V DC and can also be used with 3.3V logic.
The compact PCB is double sided PTH (plated through hole), 38mm x 30.5mm in size and Gold Plated.
All parts shown in the assembled photo are included as well as 2 x 10K resistors, which you can use for alternative configuration.
The pins can be fitted on the top or on the back of the PCB. Fitting the pins on the back allows fitting the whole assembly onto 0.1” pitch boards like our PIC prototyping boards.
What's in the box?
2 x 10K resistors, kit of components, high quality PCB and HT9170 IC.
 | Download DTMF Detector Kit PDF |
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| HT9170 datasheet |
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| Amateur Radio TNC connector to DTMF wiring information |
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