A breadboard power supply that takes an external power supply or usb, but using external can deliver atleast 3A on the 5v rail while USB is fused at 1amp (usbc connector).
External power/USB should be connectable from opposite sides or powerbar polarity has to be selectable.

Top/Bottom powerrail 5v/3.3 selectable.
Onboard clock generator with replacable crystal.
Clock can optionally be divided by 2, 4, 8, 16, 32, 64 or 128.

Designed for placement on a breadboard with dual powersupply.

Cannot exceed two blocks of the power supply and half the gap between.
PCB must be uniform and slightly rounded at the edges.

Connector pcbs.