DFG-ArdAD9833

A Digital Frequency Generator using an Arduino Nano and an AD9833 Module.

This is a quick and easy project to build a 0 - 12.5MHz digital frequency generator!

Features

Uses a DollaTek AD9833 (+ MCP41010) module (SPI bus).
Sine, square and triangle wave generation.
Frequency range 0 - 1.0MHz square and sine waves (software limited for sine waves) - P2 sketch.
Frequency range 0 - 1.0MHz (square waves) and 0 - 12.5MHz (sine waves) - P3 sketch.
Frequency range 0 - 1.0MHz (square and triangle waves) and 0 - 12.5MHz (sine waves) - P4 sketch.
Raw and amplified (with gain control) wave outputs.
Full control via a KY-040 rotary encoder.
At a glance settings all on a 20 column x 4 line LCD display (I2C bus).
Uses open source Arduino libraries for all the hardware modules.

Blue trace: Raw AD9833 output / Red trace: Amplified output

Rotary Encoder Controls

FreqGenADMCP-P1.ino

Halfway stage: Just the Rotary Encoder and the LCD modules are active.

This is shown in the accompanying YouTube video (link below).

FreqGenADMCP-P2.ino

Complete: The DollaTek AD9833 and MCP41010 module is also active.

This is shown in the accompanying YouTube video (link below).

FreqGenADMCP-P3.ino

Update 1: The DollaTek AD9833 and MCP41010 module with up to 1.0MHz square and 12.5MHz sine waves.

This update was completed after the YouTube video was made.

FreqGenADMCP-P4.ino

Update 2: The DollaTek AD9833 and MCP41010 module with up to 1.0MHz square and triangle waves, and 12.5MHz sine waves.

This update was completed after the YouTube video was made.

Arduino Nano (my go-to Arduino board for quick projects).
DollaTek AD9833 frequency generator module with onboard MCP41010 and AD8051 op-amp.
- https://www.amazon.co.uk/dp/B07DJT8Z49?psc=1&ref=ppx_yo2ov_dt_b_product_details
KY-040 rotary encoder module.
HD44780 based 20x4 LCD display.
HW-061 I2C to HD44780 piggyback module.
Owon VDS1022i USB oscillosope with open source software.
- https://github.com/florentbr/OWON-VDS1022