What should you prepare before hiring someone to design a custom PCB? Before a printed circuit board (PCB) design project starts, a Los Angeles business should be able to explain what the board needs to do, what it connects to, where it will live, how big it can be, and roughly how many you plan to build. You do not need a finished schematic or an engineering degree. A clear one- or two-page brief covering those basics will save time, reduce revisions, and help the designer give you a realistic plan.
Below, we walk through what a PCB design project involves, the information to gather before your first conversation, common mistakes that slow projects down, and how to tell whether you need a custom board at all. This guide is written for small and mid-sized businesses, product teams, and makers across Los Angeles and Orange County.
What Is a Custom PCB Design?
A printed circuit board is the flat board inside almost every electronic device that holds the components and connects them with copper traces. A custom PCB design is a board laid out specifically for your product or project, instead of an off-the-shelf development board or a stack of hobby modules wired together.
Businesses usually look into custom PCBs when a prototype built from ready-made parts works, but is too large, too fragile, too expensive to repeat, or too messy to hand to a customer. A custom board puts everything you need, and nothing you do not, into one reliable layout.
What Happens During a PCB Design Project?
Most PCB projects follow a similar path, whatever the size of the board:
- Requirements. You and the designer agree on what the board must do, its size limits, power source, connectors, and the environment it will work in.
- Schematic. The circuit is drawn out as a diagram that shows every component and how they connect electrically.
- Component selection. Specific parts are chosen based on function, availability, size, and cost.
- Layout. The components are placed on the board and the copper traces are routed between them, with attention to power, heat, signal quality, and how the board fits into its enclosure.
- Review and manufacturing files. The design is checked, then exported as the files a fabrication shop and assembler need, such as Gerber files, a bill of materials (BOM), and placement data.
- Prototype and testing. A small batch of boards is built and tested. It is normal for a first revision to need adjustments.
The Information to Gather Before You Start
The more of this you can answer up front, the smoother your project will be. If you do not know an answer, that is fine. Just say so, and it becomes part of the conversation.
1. What the board needs to do
Describe the job in plain language. For example: “read a temperature sensor every minute and send the reading over Wi-Fi,” or “control four motors from a button panel.” List every input (sensors, buttons, switches) and every output (lights, displays, motors, relays).
2. What it connects to
Note any devices, cables, or systems the board must talk to, such as USB, Ethernet, Wi-Fi, Bluetooth, a specific sensor, an existing machine, or a computer application. Include the exact model numbers of any parts you already know you want to use.
3. Power
Will it run from a wall adapter, a battery, USB, or power from other equipment? If it runs on a battery, how long should it last between charges?
4. Size, shape, and enclosure
If the board must fit inside an existing case or a specific space, share measurements, mounting hole positions, and where connectors need to sit. Photos or a rough sketch help a lot.
5. Where it will be used
An office desk, a warehouse, a vehicle, outdoors, or near heat or moisture all affect the design. Mention anything unusual, like vibration, dust, or long cable runs.
6. Quantity and timeline
Are you building five prototypes, a few hundred units, or planning for larger production later? Quantity changes which parts make sense and how the board should be laid out for assembly.
7. What you already have
A working breadboard prototype, existing code, an older board you want to replace, datasheets, or notes from a previous engineer are all valuable. Bring them.
Common Mistakes That Slow PCB Projects Down
- Changing requirements mid-layout. Adding a feature after the layout has started can mean redoing a large part of the work. Settle the must-haves first.
- Ignoring the enclosure. A board that works perfectly but does not fit its case, or puts the USB port on the wrong side, still needs another revision.
- Choosing hard-to-get parts. A component that is out of stock or near end of life can stall production. Ask about alternates early.
- Skipping test points. Small pads for measuring signals make troubleshooting the first prototypes much faster.
- Expecting the first prototype to be final. Plan time and budget for at least one round of testing and adjustment.
Do You Actually Need a Custom PCB?
Not always. If you only need one or two units for internal use, an off-the-shelf development board with a few add-on modules may be the faster and cheaper path. A custom PCB starts to make sense when you need:
- A smaller or more rugged device than modules allow
- Repeatable builds that look and work the same every time
- A product you plan to sell or install for customers
- Fewer loose wires and connectors that can fail
- A replacement for an aging board in equipment you already rely on
If you are unsure, a short conversation about your goals is usually enough to tell which direction fits.
How WinC Services Helps
WinC Services offers PCB designs for your hardware projects, along with custom PC builds, custom servers, NAS and SAN storage, and penetration testing. We are based in Pasadena and work with businesses across Los Angeles and Orange County. Our approach is simple: We Make IT Human. That means talking through your project in plain English and helping you decide what you actually need before anything gets built.
If your hardware project will connect to the rest of your business systems, our everyday IT support team can help with the computers, networks, and accounts around it.
Have an idea, a prototype, or an old board that needs replacing? Book a consultation, call us at (213) 855-3506, or email [email protected].
Frequently Asked Questions
Do I need a schematic before contacting a PCB designer?
No. Many projects start with a plain-language description, a sketch, or a working prototype built from modules. Creating the schematic is part of the design process.
What files will I receive at the end of a PCB design project?
Typically you receive the manufacturing files a fabrication shop and assembler need, such as Gerber files, a bill of materials, and component placement data. Ask your designer to confirm exactly which files are included and whether you will also get the editable design files.
How many prototype revisions should I expect?
Plan for at least one round of testing and adjustment. Simple boards sometimes work on the first try, but building time for a second revision into your schedule avoids surprises.
Can an existing board be redesigned or updated?
Often, yes. If a part has been discontinued or you want to add a feature, an existing board can be used as a starting point. Bring the board, any documentation, and notes on what needs to change.
Is a custom PCB only for large product companies?
No. Small businesses, startups, and in-house teams use custom boards for internal tools, equipment upgrades, and early products. The key is matching the design effort to how many units you need and how the board will be used.
