STEMMA Wired Potentiometer Breakout Board Adafruit STEMMA Wired Potentiometer Breakout Board is a plug-n-play potentiometer that comes with a JST-PH 2mm connector, and a matching JST PH 3-Pin to Male header cables (200mm) to make wiring a cinch. The user simply plugs the cable in, then uses the black wire to connect to ground, white wire to the input/signal pin, and the red wire to the power pin. The power pin voltage should match the voltage max of the analog input. If the user is using a 5V Arduino or compatible, connect the red wire to 5V. If they are using a 3V Feather board, connect the red wire to 3V. If the user wants to connect with alligator clips, use the Adafruit STEMMA to Gator cable. To connect to something with a STEMMA 3-pin connector already, the user can use the existing cable.