Step 4: Soldering

Once the components are in place, solder the pins together as directed by the schematic in the previous step.  Use wire to jumper points together as needed.  I tested all connections a couple times with the multimeter to make sure that everything was connected properly and that points weren't shorted together.  I've attached a schematic to this step that is a mirrored version of the original, it comes in handy when soldering and testing the connections.  It shows the view of the circuit as seen from the solder side.
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