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The PiWarmer is a book-sized device that controls the temperature of a heating element accoring to an arbitrary, user-defined program. It was developed in the Finkelstein Lab to regulate the temperature of several on-microscope experiments that required complex and precise changes in temperature.
View the schematics, bill of materials, and (coming soon) an SD card image.
To manually configure your Raspberry Pi and install the code, see the installation instructions.