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Ground the power supply board
There's just one more wire to add,
to ground the relevant
components on the power supply
board. Take a piece of black wire
and connect it from the turret at
the negative lug of C16 and connect it to the centre lug of the tag-strip.
Now that the power supply is completed, it should look like this (below). Double-check your layout
against this diagram and make sure that each connection is correct and each solder joint good before
moving on to test the power supply.