After this tedious step, he designed a PCB that hosts an Arduino Nano to accept input, two MCP23017 GPIO expanders to give it enough outputs, and CD4066BE CMOS switches to trigger the connections.

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Thermo Scientific Acclaim PepMap100 Nano LC Columns with nanoViperFittings feature high loading capacity for exceptional suitability in the analysis of low abundant peptides in complex proteomics ...