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New PCB design: UV sensor board for the Open Colorimeter

Open hardware KiCad design files for the ams-OSRAM AS7311 Spectral UVA/B/C sensor

Introducing the Open Science Shop Newsletter

IO Rodeo is a member of the Open Science Shop community. This is a collective of companies, groups and individuals with the shared goal of making it easy to find commercial, affordable, customizable open source instruments for science. If you are interested in learning more about Open Science Shop please

Measuring proteins with the Bradford assay

Methods for measuring protein concentration using the Open Colorimeter and 595nm LED.

Soil Active Carbon - POXC

This week we have a guest author post from Fabricio Cano, Pablo Cremades and Nano Castro. They are members of reGOSH in Argentina where they have been developing open hardware tools and methods for measuring soil active carbon.

Measuring beer color with a 430nm colorimeter

Revisiting and sharing some of our earlier work developing a beer color test for home brewers.

Open Colorimeter Plus: Implementing the dual light sensor design

In this post we provide an update on the Open Colorimeter Plus design. Using different white light LED boards we measured baseline light intensity and the scattered light intensity from a single 100 NTU turbidity standard.

DNA Quantitation with the Open Colorimeter Plus

In this post we describe how to perform DNA Quantitation with a commercial dsDNA fluorescence kit and our new Open Colorimeter Plus.

Update on developing a turbidity test with the Open Colorimeter

This is a continuation of our documentation on developing a turbidity test for the Open Colorimeter. Check out part one below for more background on this project! Measuring turbidity with a modified Open ColorimeterIn this post we describe a prototype right-angle (R/A) cuvette holder for turbidity measurements.Joanne LongIO

Measuring turbidity with a modified Open Colorimeter

In this post we describe a prototype right-angle (R/A) cuvette holder for turbidity measurements.

Spotlight on Caminos de Agua

For the 2nd in our Spotlight series we are excited to highlight the work of Caminos de Agua. They are a non-profit developing technologies under open-source licenses in partnership with leading research institutions, other non-profits, and members of directly affected communities.

Introduciendo el trabajo de Caminos de Agua

To read in English click here Recién presentamos Spotlight, una nueva serie paralectores del boletín con proyectos científicos de hardware de código abierto, grupos comunitarios y empresas que apreciamos. Estos destacados grupos han desarrollado y/o están usando tecnología de código abierto de maneras únicas e inspiradoras alrededor del mundo.

Electrochemistry: Current dependence on scan rate

In this tutorial we use the Rodeostat potentiostat and a screen printed electrode to demonstrate current dependence on scan rate. We know that for freely-diffusible analytes like ascorbate, the anodic peak current depends linearly on the square root of the scan rate. This is described by the Randles-Sevcik equation. The

Making a multichannel open colorimeter

We modified the Open Colorimeter firmware to use athe Adafruit AS7341 multichannel light sensor board.

Unlock the audience for your open hardware innovations

This week we invited marketing genius and friend Lex Roman of Super Easy Digital to share some thoughts with the community on marketing open hardware