Categories

• Announcements
  

  Announcements regarding our community

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  J

  @zahidshar
  We are currently out of Cheapstat stock and at this time we don't have plans to restock in the forseeable future. However, if you want to make one yourself, we do still have the bare Cheapstat PCB for sale here. We are working on updating the Cheapstat documentation to include the bill of materials for this board, so that should be on the site very soon. Let me know if you have any questions about this.

  Going forward we will be focusing most of our efforts on the Rodeostat open source potentiostat. If you are interested in using the Rodeostat or have any questions, please let us know and we will be happy to help !

• Colorimeter
  

  Forum for discussing the IO Rodeo colorimeter

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  Topics
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  Posts

  M

  Hi,
  I have created a standard curve and procedure for the detection of iron with IO Rodeo. I had to do this for class, but I figured since I have all the data I might as well share it with the IO Rodeo community. I'm new to this world, so some help would be greatly appreciated. Below is a link to a Google Doc with the procedure and the xy data for the standard curve.

  https://docs.google.com/document/d/1JRNQIUFZDZik7C3rqL_tCDvc6tvb1Ny18nD0aygDDRo/edit?usp=sharing

  # 2018-05-17 19:19:59 PST # Colorimeter Data for iron (indicator 5x10-3 M 1,10-phenanthroline, add 5 mL to 100 mL of sample) # linear # Hankard and Wolf, UST ’18 # LED green # ----------------------------- # Concentration | Absorbance 0.00 0.00 0.56 0.02 1.40 0.04 2.80 0.06 4.20 0.10 8.40 0.17 16.8 0.33 22.4 0.42
• Rodeostat
  

  Forum for discussing the new open source potentiostat shield

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  Topics
  86
  Posts

  R

  Hi, @austin ,

  I followed all your steps and it worked perfectly. Thanks a lot!

  rcbb

• Cheapstat Potentiostat
  

  Forum for discussing open source potentiostats

  23
  Topics
  70
  Posts

  J

  We are currently out of Cheapstat stock and at this time we don't have plans to restock in the forseeable future. However, if you want to make one yourself, we do still have the bare Cheapstat PCB for sale here. We have also just updated the Cheapstat documentation to include the bill of materials for this board. Let me know if you have any questions about this.
  Going forward we will be focusing most of our efforts on the Rodeostat open source potentiostat. If you are interested in using the Rodeostat or have any questions, please let us know and we will be happy to help.
  Best,
  Jo

• Electrophoresis and Gel Imaging
  

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

  19
  Topics
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  Posts

  A

  That is a good question ! We haven't tried using glass instead of acrylic for our transilluminator. However, you could certainly put your gel onto a small glass plate over the clear acrylic when you are cutting gels to protect the acrylic. You can look for small glass plates online e.g. McMaster-Carr and other stores. We will also have a look at finding some glass plates to recommend with our different transilluminator sizes.
  If you would like a replacement for your scratched clear acrylic surface, we can send you one, no problem, just let us know and we will happily help with that !

• Panels Display System
  

  Forum for questions about the Panels Display System

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  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

  6
  Topics
  17
  Posts

  W

  @tyler

  We have another batch of Rodeostat PCBs ordered and should have them back in stock in about 3 weeks.

• General Discussion
  

  A place to talk about whatever you want

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  Topics
  3
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  J

  Hi Greg,
  Thank you for your kind words about our work and for reaching out ! We will definitely take a look at the openhardware.science website, thanks. Your work sounds very cool, and we would love to chat further. We sent you a message on here so look for that and hopefully we can connect and chat soon !
  Best,
  Jo

• Shields & Breakout Boards
  

  Forum for discussing the IO Rodeo colorimeter

  3
  Topics
  9
  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