Summary of Tiny DDS – Open source DDS generator
This project presents an open-source DDS (Direct Digital Synthesis) generator featuring hardware and software integration. It uses a smart TFT module for interface, the AD9834 DDS chip for waveform generation, and an LM7171 fast amplifier for signal output. Designed as a compact, user-friendly function generator, it delivers signals from 0 to 1 MHz with 1Vpp to 10Vpp amplitude, powered safely by 12V DC. This low-cost, low-profile device targets users seeking a practical yet affordable DDS solution without complex setups.
Parts used in the Tiny DDS – Open source DDS generator:
- Smart TFT module
- AD9834 DDS chip
- LM7171 fast amplifier
- 12V DC power supply
This project is an open source (hardware & software) DDS generator, based on: smart TFT module, AD9834, LM7171 fast amplifier. The homemade function generator is a quite common project on the internet. We can find different ways to do it:
– The quick & dirty way based on a DDS module bought on eBay
– The analog version based on a MAX038 / XR2206
– The clean way based on a FPGA and a fast DAC (e.g. http://www.circuitben.net/node/14)
– The software way (e.g. Arduino + R/2R DAC)
From my side, I wanted a small one which could fits my needs without being too expensive. According to me, such generator should at least:
– Be easy to use
– Output a signal from 1Vpp to 10Vpp (+/-5V), from 0 to 1MHz
– Have a low profile
– Without electric hazard (shall work on a 12V DC)
For more detail: Tiny DDS – Open source DDS generator
