The DTMF (Dual Tone Multiple Frequency) breakout boards decodes the key press from mobile phone to 4 digit binary code. If you've wondered how an IVR works when you call customer support, it uses an DTMF decoder. So whenever you press a key on your phone, it is decoded and it plays the pre-recorded messages. It can be used to control devices, move robots from a distance.
- Based on MT8870 or compatible decoder.
- Works in differential mode
- Indication LEDs for the binary output
- Output pins taken out.
How to connect?
The board has a standard 3.5mm audio jack with which you can connect to phone. You may buy the standard 3.5mm audio cable. .
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