Products > Test Equipment
SainSmart DDS120 & DDS140 USB Oscilloscope
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PapaLukas:
Hi guys! And among those specifically doctormord, psynapse, ganzuul and donut6!
Great thanks for what you've done and even more have shared here. Inspired by this thread I've created by own version of desktop client for DDS140 Logic Analyzer module. Which I've bought to diagnoze the problems I'm having connecting SD card reader to Raspberry Pi (but that's a different story). After I received DDS140 device I was very much depressed by the fact that despite of claimed functionality and theoretic support I cannot use it for my purpose! Indeed, it turned out that a lot I can do even without any hacking of the firmware by mere writing a stable enough client. I've published the work in progress version here https://sourceforge.net/projects/logic140/ It lacks some of planned capabilities but seem to be stable enough (especially compared to stock software) and more user-friendly. Will be happy if anybody find it useful  :)
Usage note: it's developed in java and now only supports 64-bit windows platform (java is enough cross-platform, yes, but AFAIK it does not directly support usb devices, so I have a thin JNI library). In order to run it one needs installed 64-bit version of Java Runtime Environment (JRE) version 1.8. There is also all the source code published so you can build the one yourself, just need JDK 1.8, Netbeans and native toolchain (Visual Studio project for windows users is published)
At the same time I'm very curious what speeds have you manage to get gapless data at? Having these data losses IMO kills the whole idea of logic analyzer so it would be nice if other folks (like myself ;) ) could repeat your success
Regards!
rvendrame:
Any good soul who could tell the value of resistor R61?  I got it damaged (as well as the nearby AMS 1117) after a wrong ground connection...  I want to replace both parts, who knows it gets back to life...
Thanks
mmark:
R61 seems to be 0 Ohm: https://dl.dropboxusercontent.com/u/5641160/DDS120_Top_20141023_0146p.jpg (posted somewhere before)
rvendrame:

--- Quote from: mmark on January 31, 2015, 11:08:15 pm ---R61 seems to be 0 Ohm: https://dl.dropboxusercontent.com/u/5641160/DDS120_Top_20141023_0146p.jpg (posted somewhere before)

--- End quote ---

@mmark, thanks, will give it a try...
DAIRVINE:
USBEE AX pro can capture analog for several seconds at least at 24MHz. This also uses FX2.
Saleae can capture 8 bits at 24MHz for several seconds. This also uses FX2.
USBEE AX clones are available, DDS120 is just a variant of this, they are all variants of the Cypress dev boards.

With continuous capture at 24MHz nice analog like instant displays with triggering and glitch capture should be feasible in software on the PC, for example like the Rigol 2072, except slower sampling.

At several seconds of 24MHz capture trigger is less important. You can capture long enough to cover the event then find the event with software.

The above comes across as critical, it is not meant to be, I am very grateful that people spend the time to improve the software and thank you for this. It is just a desire for what could be.
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