SimCall Telephone Call Simulator
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Produces authentic DTMF dialing tones and realistic call-progress sounds including ringback, busy, reorder, error tones.
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Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
A keypad-driven telephone call simulator built on an Arduino Nano, capable of producing authentic DTMF dialing tones and realistic call-progress sounds including ringback, busy, reorder, and error tones — for both North American and UK telephone standards.
Hardware Components
Processor | Arduino Nano (clone) |
Keypad | 4×4 DTMF keypad with I²C interface (PCF8574) |
Tone generators | (2×) AD9833 DDS modules via SPI |
Amplifier | PAM8403 stereo class-D amp |
Speaker | Small 4–8 Ω speaker |
Off-hook indicator | LED pilot light |
Power | Li-Ion 18500 cell with micro-USB charging board |
Model Sources: https://www.tinkercad.com/things/l1nQ52lGVaH-simcall-final
Code Sources: https://github.com/jhogsett/SimCall