Open-Source Potentiostats for Electrochemical Detection

Potentiometry measures the potential difference between an indicator electrode in a solution and a reference electrode. This provides a quantitative non-destructive measurement of a liquid sample. A common electrode is the glass-membrane electrode used in a pH meter., but various indicator electrodes are designed for specifically for various solutions. The potentiostat is an unloved staple in most wet-labs […]

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ElectroPen: An ultralow-cost piezoelectric electroporator

Electroporation is a powerful alternative to heat shock for delivering small molecules such as plasmids across cell membranes.  By application of an electrical field netivetly charged DNA is forced into elector-competent cells by an electrohoresis-type effect. Electroporators can be expensive, generally over $2000, hence the popularity of more chemical solutions such as heat shock. Enter […]

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Pretty Good Focus

There is nothing worse than arriving in the morning to find that your overnight data acquisition drifted out of focus two hours in. However, commercial focus stabilization set ups only come on expensive and relatively recent microscopes. The coy-ly named Pretty Good Focus (pgFocus), is an open source hardware/software device for focus stabilization designed by Karl […]

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