Simple Condenser Microphone Mini Audio Amplifier Circuit Schematic
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Simple Condenser Microphone Mini Audio Amplifier Circuit Schematic

ByCharles Clark Updated on

This is a very useful and simple circuit diagram for amplifying the weak signals from a capacitive condenser microphone. You can use this circuit for sound sensing applications and some automatic robotic sensors. We have already posted an efficient audio amplifier circuit using 1895 IC. It is…

DTMF Decoder Circuit Using M8870 | Schematic and Working Principle
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DTMF Decoder Circuit Using M8870 | Schematic and Working Principle

ByCharles Clark Updated on

A Dual Tone Multi-Frequency or DTMF decoder circuit identifies the dial tone from the telephone line and decodes the key pressed on the remote telephone. Here, for the detection of DTMF signaling, we are using the IC MT8870DE. MT8870 is a touch-tone decoder IC. It decodes the input DTMF into…