For this construction step, you will need:
Battery Type Matters!
The Feedback 360° servos do best 6 to 8 volts. Five alkaline batteries provide 5 x 1.5 V = 7.5 V. Five NiMH batteries provide 5 x 1.2 V = 6 V. NiMH batteries perform well, but Ni-Cad rechargeable batteries do not perform well in this application and are not recommended.
Each pair of 3-pin servo ports along the top of the Propeller Activity Board (original or WX version) has a jumper on power-select pins to its immediate left.
Important! Make sure there are no cables plugged into the board. Moving jumpers with power connected could damage your board.
Missing a Voltage Selection Jumper? Replacements are available - contact our sales department [1] to order part #452-00043; there are three per board.
The servos and the external encoders have 3-wire cables: white = signal, red = power, black = ground. When plugging these cables into servo headers, be sure to align white wires with the I/O pin labels along the top of the board, and the black wires along the row labeled GND.
The Feedback 360° servo also has a single yellow encoder feedback signal wire, which plugs onto a separate servo header's I/O pin - closest to the top edge of the board.
With external encoders (left/top); with Feedback 360° servos (right/bottom)
*P14/P15 resistors (shown on left) are only needed for ActivityBot kits using External Encoders (#32500).
Links
[1] https://www.parallax.com/sales/contact-sales/