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AN-1204 DTMF Tone Generator
16 DTMF Tone Generator Keypad App - Resource Detail - The DXZone.com
GitHub - dilshan/dtmfgen: Library to generate DTMF tones only using Arduino Uno.
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DTMF-ENC16 – Intuitive Circuits
DTMF Tone Generator - Apps on Google Play
DTMF Encoder (Windows) - Download
Nerd Club: Telephone dialler (DTMF tone generator using PIC 16F1825) for dementia sufferers
Arduino Polyphonic Sound Synthesis - 8-bit Music and DTMF Tone Generator - YouTube
E.F. Johnson DTMF Tone Generator 5444005008 NOS | eBay
DTMF Generator Click
16 Tone DTMF Generator Keypad 1234567890*#ABCD1750Hz with CTCSS
16 Tone DTMF Generator Keypad 1234567890*#ABCD, 1750Hz tone burst, and CTCSS functionality:Amazon.com:Appstore for Android