Hardware - IO Rodeo Blog

Archived projects

As we move into working on new products, we thought it might be useful to put together a list of all of our archived open hardware products. Most of the projects listed are no longer actively supported, however the documentation contains useful links to design files, BOMs and make instructions.

pH Featherwing

The pH FeatherWing hardware guide

The pH FeatherWing is a single channel pH electrode amplifier based on Texas Instrument's LMP7721 ultra low input bias current (3 fA) precision operational amplifier. The design of the pH electrode amplifier closely follows Texas Instrument's "AN-1852 Designing With pH Electrodes" application note. It is compatible with Adafruit's

pH Featherwing

Creating a pH meter using the pH FeatherWing

In this blog post we demonstrate how to create a pH meter using the pH FeatherWing, an Adafruit Feather M4 Express and a few additional components. The meter will display a continuous readout of the current pH and can be calibrated, via button press, at pH values of 4, 7

Hardware

Electrophoresis power supply - LCD display

We have recently updated the electrophoresis power supply to include an LCD display as shown in the images below. The price of the power supply kits remains the same ($65 for a kit). We also have a fully assembled and ready-to-use power supply option for $109 here. The online documentation

Hardware

Open source potentiostat features

In this blog post we give a quick overview of some of the main differences between two open source potentiostats: Rodeostat and Cheapstat.

Hardware

Measuring emission spectra for the blue LED transilluminator

Our blue LED transilluminators use a 470 nm LED array in combination with blue and amber acrylic filters for viewing DNA bands in agarose gels stained with DNA dyes. Images of gels stained with Greenview, GelGreen and others can be seen in previous posts on our archived site here: http:

Hardware

IO Rodeo Open Source Potentiostat

We have recently been working on a new potentiostat. The Rodeostat (initally referred to as a potentiostat shield) is an open source potentiostat for performing electrochemical measurements which is designed to work with the teensy 3.2 development board. The Rodeostat is easily programmed with the popular Arduino IDE (Teensyduino)

electrochemistry

Potentiostat dummy cells

One of our most frequently asked questions on the Forums and via email is how to produce a calibration for the Cheapstat potentiostat. The Cheapstat potentiostat returns measured current values as raw unitless integers read from the ADC (analog to digital converter) at the output of the transimpedance amplifier (current

Hardware

Using an imaging enclosure for photographing gels

Photographing gels is an important step in research projects that involve any kind of visual or quantitative DNA analysis by electrophoresis. Decent gel imaging requires a fairly simple set-up of a light-tight box with a transilluminator, camera and suitable filters. In research, teaching or DIYBio labs, finding a suitable light-tight