Make a Gel Electrophoresis Power Supply

Science Technology
Make a Gel Electrophoresis Power Supply


DIY bio fans love their gel electrophoresis systems, which use a constant electrical field to manipulate molecules suspended in a gel or liquid.

Makezine_COTM_October-PowerSupplyOpen source DIY Bio company IO Rodeo created an Instructable for a gel electrophoresis power supply, which creates the electrical field that accomplishes the molecular movement.

IO Rodeo’s design is based on the MAX1771 DC-DC controller with output voltage set using a voltage divider–the user can set a variable output voltage depending on what sort of liquid is in the electrophoresis tank. The controller triggers a transistor with a pulse-frequency modulated signal in order to maintain a constant output voltage.

The creators have a code repository if you’d like to play around with the design files.

Discuss this article with the rest of the community on our Discord server!

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal

View more articles by John Baichtal