MuffinByteLabs
KICAD PCB DESIGN SPECIALIST · 5+ YEARS · JLCPCB PRODUCTION-READY
native .kicad_pro / .kicad_sch / .kicad_pcb — KiCad 8–10, no Altium, no conversions
Five-plus years in the PCB industry. I take a circuit idea or prototype and hand back a clean, manufacturable production package — native KiCad source, Gerbers, drill, BOM with LCSC part numbers, CPL, and DRC/ERC-clean proof — documented like a datasheet and organized to the file.
▼SERVICES · PORTFOLIO · THE PACKAGE · THE STANDARD
Services
I work in KiCad, and only KiCad — you get clean native source files you fully own, never a conversion from another tool. Pick the lane that matches where your project is today.
New board, idea to fab
From a concept, breadboard prototype, or draft schematic to a manufacturing-ready KiCad project.
- Schematic capture + component selection from in-stock LCSC / Digi-Key parts
- Clean 2-layer & 4-layer layout — ESP32, sensors, USB-C, power
- Full JLCPCB / PCBWay package: Gerbers, drill, BOM with LCSC / Digi-Key part numbers, CPL, PDF schematic, 3D render
Pre-fab design review
A second set of eyes on your board before you spend money at the fab.
- DRC / ERC / DFM check against your fab's real capabilities
- Footprint & part sanity pass — stock, lifecycle, polarity, pin-1, keep-outs
- Written findings report with prioritized, concrete fixes
Fix, revise & finish
Work inside your existing KiCad project without breaking what already works.
- Schematic edits, re-routes, and Rev-B board revisions
- Power & thermal fixes — pours, thermal vias, trace widths sized to current
- DXF / PDF / image redrawn from scratch as a clean native KiCad project
Portfolio
Three boards. Three client problems.
Three builds covering the briefs clients actually send: a production sensor node, a high-current LED driver, and isolated 24V I/O. Toggle the Gerber layers and open the bring-up log on any board.
Prototype-to-PCB Sensor Node
Breadboard mess in, manufacturable board out.
Datasheet-to-schematic capture, shared I2C/SPI buses, a protected analog input, and a tidy 2-layer pour that DRCs clean.
WLED High-Current Matrix Driver
Real amps, real copper, clean 5V data.
Power-path trace-width sizing, wide copper pours, bulk decoupling, and a proper 3.3V→5V data level shift for WS2812B.
24V Industrial-Style I/O Controller
Interfaces 12/24V field equipment behind a real isolation gap.
24V→5V buck with a tight switching loop, reverse-polarity + TVS front-end, and opto-isolated outputs with a real isolation gap / star ground.
The Deliverable
Anyone can route a pretty board — the difference shows in the hand-off. Every project ships in the same predictable structure, and the tree below is the actual layout, file for file. Hover or tap any file to see what the fab does with it.
source/
Editable KiCad project — .kicad_pro / .kicad_sch / .kicad_pcb. The client owns the design, not just the artwork.
Skills
The full toolkit, in the order your project will use it — design the circuit, lay out the board, and hand your fab a package that works the first time.
Schematic & circuit design
from datasheet to a clean, readable schematic
- Schematic captureKiCad 8–10
- Datasheet → schematic translation
- Component selectionLCSC · Digi-Key · Mouser
- ESP32-WROOM module integrationantenna keep-out
- USB-C done right5.1k CC pull-downs + USBLC6 ESD
- LDO & regulator selectionAP2112K-3.3, not AMS1117
- MOSFET / optocoupler driver stages
- Input protectionpolyfuse · TVS · reverse-polarity
- Power budgeting per rail
PCB layout
boards that route clean and run cool
- 2-layer & 4-layer layoutFR-4 · 1.6mm
- Ground planes & return paths
- Decoupling placementtight to every VDD pin
- I2C / SPI / UART bus routing
- Level shifting 3.3↔5V74AHCT125
- Buck converter layouttight switching loop
- Trace widths sized to currentIPC-2221
- DFM to fab rules6/6 mil JLCPCB
- Footprints & library management
- Test points, mounting holes & enclosure fit
- 3D mechanical fit checks
Manufacturing hand-off
the package your fab accepts first try
- Gerber generationRS-274X
- Drill filesExcellon NPTH + PTH
- BOM with real part numbersLCSC / Digi-Key
- Pick-and-place / CPL files
- DRC + ERC clean, with proof
- JLCPCB workflow end-to-endupload → assembly review
- Clear silkscreen & assembly markings
- Datasheet-grade documentationREADME · REV notes · CHANGES
- Git-versioned, organized hand-off
The Standard
Built to a standard. Delivered on schedule.
The difference between a hobbyist and a professional isn't the board — it's everything that arrives with it.
Five years in the PCB industry
Boards designed for production, not for the bench drawer. Schematics, layouts, and hand-offs that have been through real fabs, real assembly lines, and real design reviews.
Documentation that reads like a datasheet
Annotated schematics, a README that states the design intent, REV notes that say what changes next, and a CHANGES log for every spin. Your next engineer picks the project up cold.
Organized to the file
The same predictable project structure every time — /source, /production, /docs — versioned in Git. You will never hunt for a file or wonder which Gerber is current.
Accountability, in writing
A fixed quote before work starts. Weekly written updates while it runs. And a money-back guarantee in every signed contract — if the delivered work doesn't meet the agreed scope, you get your money back.
Contact
Send a short brief and you'll have a fixed quote within 24 hours — no hourly meters, no surprises.
Send the brief
What the board does, your target fab, and any files you already have — a paragraph is enough to start.
Fixed quote in 24h
Scope, price, and timeline in writing. NDA signed first if your project needs one.
Contract, then work
A signed contract with the money-back guarantee written in: if delivery misses the agreed scope, you get a refund. Then the board gets built.
Money-back guarantee, in writing.
Every engagement starts with a signed contract that puts the guarantee in writing — if the delivered work doesn't meet the agreed scope, you get your money back.
KiCad-only PCB design — new boards, pre-fab design reviews, and revisions to existing projects