Generally, if you want to control how someone uses or reproduces a work you've designed, the law must first grant you a monopoly on some set of rights, and then you may choose grant some incomplete set of those rights to others.
Copyright is one such kind of monopoly, covering the rights to reproduce and author modified form of certain categories of creative works. Largely, copyright is limited to artistic works of a written, visual, auditory, or sculptural nature (but also, interestingly, includes hull designs for naval vessels as a special statutory exception). In general, copyright will not cover practically useful aspects of copyrightable works, and it calls these not-copyrightable objects "useful articles". The U.S. Copyright Office says:
Copyright does not protect the mechanical or utilitarian aspects of such works of craftsmanship. It may, however, protect any pictorial, graphic, or sculptural authorship that can be identified separately from the utilitarian aspects of an object. Thus, a useful article may have both copyrightable and uncopyrightable features. For example, a carving on the back of a chair or a floral relief design on silver flatware could be protected by copyright, but the design of the chair or flatware itself could not.
There is one kind of circuit design that is copyrightable, circuit mask works. The author of such a mask work is granted copyright monopoly, which can be licensed as any other copyright rights are, and used to limit distribution and reproduction to terms of your choosing, including when it is embodied in a physical manufactured circuit.
If your circuit design does not constitute a mask work, then it doesn't fall under a copyrightable class of work, and insofar as it's designed for practical utility, it is not copyrightable. Without a copyrighted work, you cannot employ a copyright license.
The only other applicable set of rights would be patent rights. If your circuit design is not eligible for copyright, it may still be patented, if it embodies a novel, patentable system. The system must have (1) some kind of new advantage over the state of the art and (2) be non-obvious to someone with "ordinary skill" in the art of circuit making. If your system meets this standard, you can undertake the process of applying for a patent, in whichever national jurisdictions, globally, you wish to have patent rights.
It is an expensive and complex process to determine what aspects of your design are patentable, draft an application with explanations and illustrations, and register your patent globally. If your patent is granted, then you can license out the right to employ your patented system to anyone you like, under whatever terms you choose.