Let's say I plan on building a consumer electronic system (some electronic product). This system would have a PCB and a plethora of various components: LEDs, transistors, resistors, light sensors, microphones, a power supply, etc. I would obtain these from a distributor or perhaps even directly from a manufacturer.
In addition to purchasing them from a supplier, do I also owe royalties or other licensing-based fees for each of these components? What criteria/factors drive this answer?