Tiny DDS Open source DDS generator Project
This project is an open source (hardware & software) DDS generator, based on: smart TFT module, AD9834, LM7171 fast amplifier. Description 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) Tiny DDS - Open source DDS generator Project Schematic Choosing the DDS chip I first started to look for a cheap DDS chip on eBay; you have to be careful because most of DDS chips have only a sinusoidal outpu...