Step 2: Wiring the TRRR Audio Connector
Begin by soldering a roughly 1’ length of audio cable to the connectors for the middle and bottom ring of the 4-conductor audio plug. The bottom ring (furthest from the tip) goes to the largest connector. If you’re not going to get all fancy with RCA audio jacks and plugs, just tin or solder a short solid wire to the other ends so that they stick more easily into the protoboard. Do the same with a 1-2’ audio cable for the alligator clips and the leads for the switch(es). Be sure that the alligator clip connected to common is identified as such. When ready you can cut down the breadboard to fit in your plastic box, leaving the rest for other projects.