Volume Controller
When you combine laziness with an engineer’s state of mind, this is what you end up with. They may be too lazy to change the radio on their own but not lazy enough to get off their butt and put their mind to good use. Engineers are like entrepreneurs—they are willing to work 80 hours a week to avoid 40-hour workweeks.
The idea behind this mechanism is simple. They just need to turn the wheels of the RC car to turn the radio’s volume up and down. In the time it took to come up with this solution, this person probably could’ve gone out and gotten a radio from this day and age.