Many factories exist that can make circuit boards mass produced, built it is another thing to make a circuit board from scratch. There is actually quite a niche industry that makes custom boards, but it requires much more attention to detail as well as a specialized base called a breadboard in the electronics business. Whether you just need a custom job or else an experimental first design, choose people who can make a Prototype Circuit Board without a fuss.
This is a specialty service, but there are indeed companies that can do it. They need to know the details of your machine so that they can understand the blueprint and how all the parts interconnect. It is possible just to hand a plan to a company and have them make the product, but try to take advantage of their expertise when making a complex electronic for the first time. If it fits into a desktop computer slot, then choose a company dedicated to making custom expansion cards.
If it is for a new electronic device that is made for scratch, it might still be best to stick with a specialist. There are people who assemble radios by hand in order to make custom radios and will instantly recognize a similar schematic. Someone in the Prototype circuit board business but who does not make radios might be able to identify the parts but might not be able to put it together instantly with great precision. It is one thing to know the parts and know soldering techniques but another thing to know how all related parts fit together.
Some parts can be tuned using one method or another, and a specialist can tell how well certain variable parts, such as semiconductors, will match other parts. Dealing with an expert can help to refine a schematic before it is produced. An expert can also serve as a consultant even after the initial plan is drawn. Do not miss the opportunity to ask a crafts person how different components have fared under specific loads.
Whatever the need, a small shop can make a variety of circuit boards using a breadboard and a variety of off-the-shelf transistors and wiring. While it might not be as minimalist as a factory product, it will get the job done and serve as a prototype for what is expected to go into production. Since it is not streamlined with smaller parts and wires, it might not work as fast and might give off extra heat. It will at least allow you to know if the design works effectively for commercial production.
