Categories

• Announcements
  

  Announcements regarding our community

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  Posts

  M

  Does anyone can suggest compact flash card 128MB, 45x or 60x that works well and it's available to purchase on American/Japanese market?

• Colorimeter
  

  Forum for discussing the IO Rodeo colorimeter

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  W

  @poseidon

  I don't have a change log, but this is probably something I should start doing. There are the repository commits here
  https://bitbucket.org/iorodeo/colorimeter/commits/all The new release incorporates all the changes starting at 2016-09-04

• Rodeostat
  

  Forum for discussing the new open source potentiostat shield

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  Posts

  W

  @ywu

  Hi Yvonne,

  There is a feature comparison between the Rodeostat and the Cheapstat here https://iorodeo.com/blogs/news/potentiostat-comparison

  The Rodeostat currently has the following tests implemented in firmware: cyclic voltammetry, linear sweep, constant voltage, chronoamperometry, sinusoidal voltammetry, multistep voltammetry.

  In addition the Rodeostat can be controlled in direct/manual mode where the potential is set directly from the python program on the host PC.

  Documentation for the python library used to communicate with the Rodeostat can be found here:
  http://stuff.iorodeo.com/docs/potentiostat/

  Documentation for the various tests (implemented in the Rodeostat firmware) can be found here:
  http://stuff.iorodeo.com/docs/potentiostat/tests.html

  Examples demonstrating how run tests and how to use direct/manual mode can be found here:
  http://stuff.iorodeo.com/docs/potentiostat/examples.html

  Also, if there is a specific test you are interested in which isn't in the existing firmware let me know. It is very likely that I can add it for you.

  I'm currently working on a software with a GUI for the Rodeostat. So you should be able to use it fairly soon without any programming.

• Cheapstat Potentiostat
  

  Forum for discussing open source potentiostats

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  W

  @leland.smith said in Galvanostatic measurements?:

  galvanostatic

  No the cheapstat cannot do this.

• Electrophoresis and Gel Imaging
  

  A forum for discussing our open source gel electrophoresis, transilluminators and gel imaging equipment

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  Topics
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  Posts

  J

  Hi,
  We used the white light transilluminator with this Biotium DNAzure blue DNA stain:
  https://biotium.com/product/dnazure-blue-nucleic-acid-gel-stain/

  I could imagine that this combination would work well in, for example, a classroom or educational setting as it doesn't require a dark room. I also did like that you can dry the gels and keep them which might be handy.

  Other uses for the white light box might be for imaging Coomassie stained gels, for example.

  However, I would recommend using the blue LED transilluminator for dyes such as GreenView, SYBRSafe etc.

  At this time I haven't carried out a comparison of the sensitivity of the two dyes and transilluminators. You can find more information on the sensitivity of DNAzure on the Biotium link above.

  I hope that helps !
  Jo

• Panels Display System
  

  Forum for questions about the Panels Display System

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  Posts

  A

  Oh gosh, you are right! I’m sorry for the delay but I was very busy. I have never thought to rotate the LED matrix because I thought I was right with that (otherwise, if not, no LED would have turned on). Thanks very much! I also take advantage of you for another issue. I have tried to load the arena configuration on the SD card but PControl doesn’t let me do that. Have you any suggestion? It seems that the controller doesn’t communicate to the SD nevertheless at the beginning (when the controller is switch on) PControl finds and initializes the SD card. I’m sorry because of all these questions!

• Online store and Shipping
  

  A place to ask questions about our online store, inventory and shipping

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  Topics
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  Posts

  J

  Below are some images of the green LED transilluminator we designed for a custom application using the superbright green LEDs I mentioned earlier. The enclosure is the same as the blue version, we just swap the 470 nm LED for the superbright green LED. A diffuser and green filter is placed over the LEDs as I mentioned.

  The red viewing filter that sits above the LED board is actually a thin film Roscolux #26 filter which we laser cut.
  

  Because it is thin, we have to support it. We can do this using a black frame.
  

  Let me know what you think and whether this would work for your application.

  We would be able to ship approx. a week after ordering. The lead-time would be on purchasing the LEDs from Superbright. Once we receive the LEDs we would ship 1-2 days later. The cost would be $225 for the fully assembled version with the 18V power supply. So it would be ready to use. I can send you a formal quote if you want to send me an email with your shipping info to jo@iorodeo.com.

• General Discussion
  

  A place to talk about whatever you want

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  J

  Specifically I have been developing a sensor suite for colorimetry/spectrophotometry, as well as turbidity and electrical conductivity. (and pH would be a bonus to get in there) But you guys have already created it pretty much. With all that information you could quantitatively measure species in water samples and other chemical reactions.

  I am excited to see that it works, your lead tests were a nice proof of that, but I feel that it could be expanded upon if the detector is sensitive enough, and I think AMS just released one. If you emit a wavelength that is absorbed by a certain molecule, it then emits a photon again when the electron drops back to the lower energy state. There should be a wealth of information within that space between light you emit, what is transmitted, scattered, and absorbed, and then what is emitted again by the electron dropping to the lower energy level.

  I have worked with spectrophotemeters, beer-lambert law, and the most interesting to me, flame atomic absorption spectroscopy, so I would love to discuss your devices with someone. I cant promise I would be useful, but maybe I would have some insights. My specialty is water chemistry but I love all kinds of chemistry and physics. I would love to talk about any of this, including your potentiostats, which are brilliant. They would allow creation of absolutely efficient plug flow reactors with real time monitoring, making them extremely useful. My thought is they only need to be marketed to the right people.

  Anyways, thank you for reading at least, and I hope to hear back from you.

  -Jon

• Shields & Breakout Boards
  

  Forum for discussing the IO Rodeo colorimeter

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  Posts

  W

  @fscker

  It looks like the RTL8195 has 3.3V IO. The potentiostat shield powers the MCP4261 with 5V. So you are connecting a 3.3V device to a 5V device - I think. I'm not sure if the IO pins on the RTL8195 are 5V tolerant, but you might want to check. Could be related to you issue.

  Note, the MCP4261's could be powered off of 3.3V. They have a pretty broad allowed input range 2.7 - 5.5V. This would require cutting one trace - the one going to the 5.5V on the shield - and rerouting this trace to to the 3.3V pin.

  The spec sheet for the MCP4261 can be found here. http://ww1.microchip.com/downloads/en/DeviceDoc/22059b.pdf