The Digital Control Unit Power Output Kit, order code DCU-POP, $35 is a great starter set of output devices for use with the Digital Control Unit, order code DCU-BTD, $61. The kit includes several output devices, including a motor, LEDs, incandescent light bulbs, and connecting wires.
Most components will require external power to operate. The DCU is designed to accept LabQuest Power Supply, order code LQ-PS, $11 and Vernier AC Adapter, order code IPS, $12 as external power supplies. Third party power supplies must be either 3.3 mm center-positive or 5.5 mm center-negative barrel connectors.
NOTE: When connecting an LED to the DCU, it is important to wire a current-limiting resistor in series with the LED to avoid damaging the LED.
TIL 2101: Digital Control Unit (DCU) Troubleshooting and FAQs
TIL 825: Where do I find electronic components for use with the Digital Control Unit (DCU)?
Note that this product is separate form the KidWind Power Output Pack, order code KW-POP, $14.