MT8870 | CM8870 | DTMF tone decoding with MT8870 | DTMF decoder

DTMF decoding to binary code using MT8870, and it is done without any microcontroller. Here, I've used two mobile, one is connected to the circuit, another is in our hand to control the circuit.

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Required Components:

Two mobile
MT8870
LEDs
3.57 MHz crystal oscillator
100 K Resistor
330 K Resistor
20 pF ceramic
10 nF ceramic
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Chapter:
0:00 - Circuit
1:53 - Practical
4:41 - Output

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