Open Source Hardware is hardware whose design is made publicly available so that anyone can study, modify, distribute, make, and sell the design or hardware based on that design. Open hardware is paving the way for recent technological developments, especially in the field of Internet of Things (IoT) and 3D Printing. Here is all you need to know to about Open Source Hardware.
https://fossbytes.com/what-is-open-source-hardware-and-why-should-you-care/