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Circuit Diagram DTMF | Home automation system, Electronics basics
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dtmf circuit : Telephone Circuits :: Next.gr
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Schematic of the DTMF encoder and decoder | Download Scientific Diagram
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DTMF ENCODER kit - CS Tech
![A multipurpose DTMF encoder](https://i2.wp.com/www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1988/07/page32/fig1.jpg)
A multipurpose DTMF encoder
Circuit diagram for decoding the DTMF tones | Download Scientific Diagram