Ham Radio

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Arduino RTTY

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This page contains my source code for my Arduino RTTY transmitter. This device uses an Arduino to control a DDS-60 (Analog Devices AD9851) DDS IC, which in turn creates the required frequencies to transmit RTTY at 45.45 baud (approx) with 170 Hz shift.

Source Code for AD9851 RTTY Transmitter

The code is a selection of modules glued together, but works well. See the YouTube video below for a demonstration.

Youtube Link

Arduino DDS-60 Configuration


This work is based around the work of the following two people, whom in turn have provided links for their works. Thanks guys!

  • [RADIO] Baudot - Tim Zaman
  • Controlling an AD9851 DDS with an Arduino