[Frank Herrmann] had an interesting idea to turn a geared DC motor into ... Together, this handful of parts provide all that is needed to read the encoder, control the motor rotation and listen ...

If you would like to learn more about how jet engines work you may be interested in this new DIY Arduino ... parts and added some extra ones to make the model suitable to spin once I place a DC ...

but getting an Arduino starter kit is more convenient. Most already come complete with the UNO board and a bunch of components like LEDs, a temperature sensor, a DC motor, a servo motor ...