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engineersgarage.com
DIY - DTMF Tone Generator and Decoder Circuits
The given project describes how different DTMF tones can be generated using DTMF tone generator chip 91214B and how these tones can be decoded by DTMF decoder chip MT8870 that generates 4-bit digital output.Using these two circuits together one can build DTMF based remote control application in which 91214B chip is used as remote control and ...
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