In this five part series, I take you through my process for upgrading a bare bones LM317 linear adjustable power supply. This upgrade will include adding a second 5 volt constant power rail. The 5 volt rail will provide power to both the new current meter and be made available on the front panel. The heat sink, transformers, case, and all wiring was replaced to accommodate the additional requirements. You can download the EagleCAD files for each of the circuit boards here:

Download Adjustable Power Supply Board EagleCAD files

Download 5v Power Supply Board EagleCAD files

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