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Simple Tone Generator Circuit Using NE555 Timer IC
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Dial Tone – Elmer Cat
DTMF TONE DIALER
Telephone Tone Generator Requires No Trimming
DIY - DTMF Tone Generator and Decoder Circuits
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DIY - DTMF Tone Generator and Decoder Circuits
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DTMF Decoder / Encoder
MT8870 DTMF Telephone Dial Tone Decoder
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DTMF TONE DIALER
16 Tone DTMF Generator Keypad 1234567890*#ABCD, 1750Hz tone burst, and CTCSS functionality:Amazon.com:Appstore for Android
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