DTMF Multi-channel code decoding infrared remote control circuit

  
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Figure (a) is the infrared emission circuit that composed of 12 the keyboard and S2559. Figure (b)shows DTMF decoder circuit and channel control circuit composedof the MT8870. Figure (c) is the voltage amplifier circuit composed of two-op ampLM358..
DTMF Multi-channel code decoding infrared remote control circuit - schematic




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