Sunday, March 29, 2015

Circuit Schematic Project Tiny DDS - Open Source DDS Generator

Robometricschool. - Here is Circuit Schematic Tiny DDS - Open Source DDS Generator like in figure 1 below. This project is an open source (hardware & software) DDS generator, based on: smart TFT module, AD9834, LM7171 fast amplifier.

Circuit Schematic

Figure 1. Circuit Schematic Project Tiny DDS - Open Source DDS Generator
(Source: www.electronics-lab.com)

Description

The homemade function generator is a quite common project on the internet. We can find different ways to do it:

  1. The quick & dirty way based on a DDS module bought on eBay
  2. The analog version based on a MAX038 / XR2206
  3. The “clean” way based on a FPGA and a fast DAC (e.g. http://www.circuitben.net/node/14)
  4. 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:

  1. Be easy to use
  2. Output a signal from 1Vpp to 10Vpp (+/-5V), from 0 to 1MHz
  3. Have a low profile
  4. Without electric hazard (shall work on a 12V DC)


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