Expert PCB Engineer for PI base Board

@abdurRafiqM

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message for my previous designs and also so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq

@nevorek

Good day. Some of my past work you can look in portfolio. Can start task ASAP. But for accurate terms i need to look at schematic.

@Webslinger01

I have designed and shipped multi-peripheral PCBs with USB routing, ESD protection, power rail verification, and DFM-clean fabrication packages before — including a deployed industrial IoT system with multi-interface PCB layout, full Gerber package, and PCBWay fabrication. CM4 carrier board design disciplines — connector pinout verification, USB differential pair routing, decoupling placement, and reset/boot signal handling — are work I've done. For this project I will: • Verify the existing schematic: CM4 connector mapping, USB hub topology, power rails, ESD/TVS placement, decoupling, reset/boot logic, and net connections against the CM4 datasheet • Complete or improve PCB placement and routing — USB D+/D− as length-matched 90Ω differential pairs, power planes clean, ground stitching vias at USB connectors • Run ERC/DRC, fix all critical errors, check footprints and land patterns • Verify manufacturability for fabrication and PCBA • Deliver: schematic review report, completed layout, ERC/DRC-clean project, Gerbers, drill, BOM, CPL, and issue log Happy to sign NDA immediately. Delivery in 2 days from file receipt. Once verified, I will ship the fabricated board to you. Which EDA tool are the project files in — EasyEDA Pro or KiCad?

@soniaer987

Hello, I am an experienced Embedded Systems and PCB Design Engineer with expertise in Raspberry Pi CM4 carrier boards, USB routing, power distribution, and multi-layer PCB design. I can review and verify the schematic, check CM4 interfaces, USB sections, power rails, grounding, ESD protection, footprints, and component placement before completing and optimizing the PCB layout and routing. I will perform ERC/DRC validation, verify manufacturability, and deliver production-ready Gerber files, BOM, CPL, drill files, assembly notes, and the final editable project files. I am comfortable signing an NDA before receiving the design files and can provide a detailed review report outlining all changes and recommendations. I look forward to discussing the project.

@anjalin0309

Hello, I am a Hardware Design Engineer with experience in schematic review, PCB layout, embedded systems, and manufacturing-ready hardware development. I primarily use KiCad. Your CM4 carrier board project aligns well with my experience in embedded hardware and high-speed digital design. I can thoroughly review the existing schematic before proceeding with layout improvements, ensuring that critical areas such as CM4 interfaces, USB connectivity, power distribution, grounding, protection circuits, reset/boot signals, and decoupling are implemented correctly. For this project, I can: • Verify schematics, footprints, pin mappings, and net connectivity • Review CM4 carrier board design practices and interface requirements • Check USB hub and USB port routing, including differential pair considerations • Improve component placement and PCB routing for signal integrity and manufacturability • Run ERC/DRC checks and resolve identified issues • Review DFM/assembly requirements to reduce manufacturing risks • Generate complete production files including Gerbers, drill files, BOM, CPL/Pick-and-Place files, and assembly documentation • Provide a concise review report detailing findings, corrections made, and any remaining design considerations I would be happy to review the current design and discuss any specific concerns or manufacturing requirements before starting.

@aleksandarm72

Hi , I reviewed your CM4 4-USB carrier board project. As a Senior Electronic Engineer (B.Sc.) with 25+ years of hardware design experience—frequently working with high-density fine-pitch interfaces similar to the CM4 mating connectors—I specialize in multi-layer routing, Signal Integrity (SI), and Power Integrity (PI). I am ready to sign the NDA immediately to audit your design files. My engineering focus for your board: CM4 Interface & Power Validation: Comprehensive audit of the Hirose DF40 high-density connector pinout, verifying GLOBAL_EN/RUN_PG hardware sequencing, and ensuring correct pull-up/down strap configurations for boot-critical signals. Controlled Impedance Routing: Strict 90-ohm differential pair routing for high-speed USB lines, with optimized return paths and continuous reference planes to eliminate EMI/crosstalk. Power Distribution (No Voltage Drops): Heavy-duty Power Distribution Network (PDN) layout and low-ESR decoupling to guarantee stable 5V VBUS delivery, completely preventing voltage drops when all 4 USB ports are operating under full load. ESD/EMI Protection & DFM: Front-line TVS diode array placement at entry points, proper chassis ground isolation, and full DRC tailored to your manufacturer’s capabilities. I will deliver a detailed engineering delta-report along with production-ready Gerber X2, NC drill, and centroid files. Let's sign the NDA and get started. Best regards, Aleksandar Makarevski, B.Sc. Senior Electronic Engineer