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William Dickson

William Dickson

New colorimeter open hardware design expands flexibility

New colorimeter open hardware design expands flexibility

Our open hardware colorimeter is a popular tool for measurements analytes using colorimetric assays. We initially designed the colorimeter as an educational kit in 2012 with Kickstarter funding.

Rodeostat FeatherWing Hardware

Rodeostat FeatherWing Hardware

Overview The Rodeostat FeatherWing is a potentiostat expansion board which is designed to be compatible with Adafruit's Feather/FeatherWing system. It is a single channel potentiostat which provides connections for one working, one reference and one counter electrode. It has a +/- 1.65V output range and comes

Making an open source COVID-19 face shield

Making an open source COVID-19 face shield

Like many people, we have been alarmed at the reports of the lack of personal protective equipment (PPE) for healthcare workers on the frontlines of the COVID-19 pandemic. We have been following the work of many individuals and groups on social media making open source PPE as we try to

Rodeostat Multiplexer

Rodeostat Multiplexer

The Rodeostat Multiplexer [https://iorodeo.com/collections/cheapstat-open-source-potentiostat/products/rodeostat-multiplexer-expansion-kit] is an expansion board for the Rodeostat potentiostat [https://iorodeo.com/collections/cheapstat-open-source-potentiostat/products/potentiostat-shield] which enables it to be used with up to seven working electrodes simultaneously. This is achieved by adding a multiplexing switch to the single working

Rodeostat Muliplexer Kit Assembly

Rodeostat Muliplexer Kit Assembly

The multiplexer kit [https://iorodeo.com/products/rodeostat-multiplexer-expansion-kit] is an add-on accessory for the Rodeostat [https://iorodeo.com/collections/cheapstat-open-source-potentiostat/products/potentiostat-shield] which expands the number of working electrodes that can be used with the Rodeostat from one to seven converting it from a single-channel to a multi-channel potentiostat. In

pH FeatherWing Hardware

pH FeatherWing Hardware

The pH FeatherWing [https://iorodeo.com/products/phfeatherwing] is a single channel pH electrode amplifier based on Texas Instrument's LMP7721 [http://www.ti.com/lit/ds/symlink/lmp7721.pdf] ultra low input bias current (3 fA) precision operational amplifier. The design of the pH electrode amplifier closely follows

Creating a pH meter using the 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