View Mt8870 Dtmf Decoder Datasheet PNG. The decoder uses digital counting techniques to detect and decode all 16 dtmf. For example, the tone of 941hz + 1336hz will be decoded.

Mt8870 Dtmf Decoder Module Decimal Output Pmd Way
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Its filter section uses switched. Decoding dial tones received from mobile phone and displaying them on the serial monitor of arduino. For example, the tone of 941hz + 1336hz will be decoded.

The filter section uses switched capacitor techniques for high and low group filters;

When the dial pad is pressed, it. On the telephone exchange side, it has a decoder circuit to decode the tone to digital code. The filter section uses switched capacitor techniques for high and low group filters; The decoder uses digital counting techniques to detect and decode all 16 dtmf.