
In Progress
Posted
Paid on delivery
1. Project Overview The objective of this project is to design a professional, industrial-grade custom carrier board (PCB) for a Teensy 4.1 microcontroller. The board will be used in an automotive test-bench environment to sniff data from a VAG DQ200 DSG gearbox, read high-speed engine RPM from a 3-wire Hall effect sensor, monitor real-time supply voltage via an I2C sensor, and transmit all telemetry data over an RS485 bus to an external display. CRITICAL NOTE FOR THE FREELANCER: This project covers HARDWARE DESIGN ONLY (Schematic Capture, PCB Layout, and Manufacturing Files generation). Firmware and software development are completely excluded from this scope and will be handled internally by the client. 2. Hardware Pin Mapping & Software Particulars To maintain absolute compatibility with our internal firmware development, all hardware interfaces must be routed strictly to the following native Teensy 4.1 pins: • RS485 Communication (Serial1): o Digital Pin 0 (RX1) $\rightarrow$ Connected to the RO (Receiver Output) pin of the RS485 transceiver. o Digital Pin 1 (TX1) $\rightarrow$ Connected to the DI (Driver Input) pin of the RS485 transceiver. o Digital Pin 5 $\rightarrow$ Connected to the tied DE/RE (Driver Enable / Receiver Enable) pins for software-managed hardware direction switching. • CAN 1 Interface (Classic): o Digital Pin 44 (CTX1) and Digital Pin 45 (CRX1) $\rightarrow$ Routed to the first CAN transceiver. • CAN 2 Interface (Classic): o Digital Pin 3 (CTX2) and Digital Pin 2 (CRX2) $\rightarrow$ Routed to the second CAN transceiver. • CAN 3 Interface (High-Speed CAN-FD): o Digital Pin 23 (CTX3) and Digital Pin 22 (CRX3) $\rightarrow$ Routed to the third CAN transceiver (designated for high-speed CAN-FD data). • Senzor Hall Input (RPM Reading): o Digital Pin 4 $\rightarrow$ Connected to the isolated collector output of the optocoupler. When a magnet passes the sensor, the optocoupler must pull Pin 4 down to the internal Teensy GND, generating a hardware-friendly FALLING edge trigger. • Voltage Monitor Interface (I2C Bus): o Digital Pin 18 (SDA) and Digital Pin 19 (SCL) $\rightarrow$ Routed to the digital power monitor IC. • Ethernet Interface: o The 6 internal Ethernet pads located on the Teensy 4.1 PCB $\rightarrow$ Routed directly to the board-mounted RJ45 connector. 3. Detailed Hardware Block Requirements 3.1 Power Supply Stage (Automotive Grade Step-Down) • Input Voltage: 12V–14.8V DC (Vehicle battery / Bench power supply). • Reverse Polarity Protection: A P-MOSFET circuit configuration (Reference part: AOSS21311C or equivalent) must be used to provide robust reverse polarity safety with zero forward voltage drop. • Transient Suppression: A high-power TVS Diode (Reference part: SMAJ36) must be placed immediately at the 12V input rail to clamp inductive spikes, cranking noise, and vehicle load dumps. • Primary Regulator: A high-efficiency DC-DC Step-Down Buck Converter delivering a stable 5V DC output to the Teensy VIN pin (Reference design: XL1509-5.0 or similar integrated switcher layout). • Auxiliary Power Rail: An on-board dedicated 3.3V LDO regulator to power auxiliary ICs (all transceivers and sensors), completely offloading the Teensy 4.1 internal regulator to prevent thermal stress. 3.2 Triple CAN Bus Interface • Transceivers: 3x Independent CAN interfaces using MCP2562FD-E/SN (or compatible high-speed TJA1044GT) transceivers, ensuring all 3 physical lines fully support CAN-FD high-speed protocols (up to 5-8 Mbps). • Voltage Logic Level Matching: Transceivers must use the 5V rail for VDD (bus power) and the Teensy 3.3V rail for VIO to ensure native logic-level compatibility with the MCU processing pins. • Termination Resistors: Each of the 3 CAN channels must feature an on-board 120-Ohm termination resistor connected through a physical 2-pin header/jumper for manual circuit activation. • ESD Protection: Dedicated low-capacitance ESD protection diode arrays (Reference part: PESD1CAN) must be placed on all physical CAN High and CAN Low external signal lines. 3.3 RS485 Communication Interface • Transceiver: 1x RS485 Transceiver operating natively at 3.3V logic (Reference part: MAX3485 or SP3485). • Direction Control: DE and RE pins must be tied together and routed to Digital Pin 5 for firmware-driven stream management. 3.4 Optically Isolated RPM Sensor Input • Interface: A 3-pin terminal block for a standard 5V Hall Effect speed sensor (VCC 5V, GND, Signal). • Galvanic Isolation: The incoming pulse signal must be isolated from the Teensy via a high-speed PC817 optocoupler. This prevents ground loops between the engine block and the test bench from corrupting the MCU rails. The isolated output transistor must switch Teensy Digital Pin 4 to internal GND. 3.5 Digital I2C Voltage Monitoring Stage • Sensor IC: 1x INA219 (or INA226) digital power/voltage monitor IC mapped to I2C pins 18 and 19. • Bus Hardware: Include 2x 4.7k-Ohm pull-up resistors on the SDA and SCL lines tied directly to the 3.3V auxiliary power rail. • Measurement Target: The sensor’s $V_{BUS}$ sensing pin must tap the main 12V automotive input line after the TVS diode and MOSFET protection stage to read true system voltage sags during motor operations. 3.6 Dedicated USB Protection Stage • Data Line ESD Protection: A dedicated, ultra-low capacitance ESD protection diode array (Reference part: USBLC6-2SC6 or PRTR5V0U2X) must be placed inline on the USB D+ and D- high-speed data lines between the external USB connector and the Teensy 4.1 USB pads. • Power Isolation Jumper: The VBUS (5V USB) trace from the external USB connector must pass through a physical, manually switchable 2-pin header/jumper before connecting to any internal rail. This guarantees that the diagnostic laptop's USB power can be completely isolated from the on-board 12V-to-5V Buck converter, preventing backfeeding currents. • Noise Filtering: Include a ferrite bead on the USB shield/GND path to isolate high-frequency test-bench noise. 3.7 Ethernet Interface • Differential pairs must be routed from the Teensy 4.1 internal 6-pin Ethernet pad layout directly to a board-mounted RJ45 MagJack connector featuring integrated isolation transformers (Reference part: HR911105A). 4. Deliverables & Production Files Requirements The freelancer must supply a complete, turnkey manufacturing package optimized for direct submission to automated PCB fabrication and SMT component assembly houses (e.g., JLCPCB, PCBWay). The required outputs are: 1. Gerber Files: Extended Gerber format (RS-274X or Gerber X2) including all copper layers, solder masks, silkscreens, and drill-guide board outlines. 2. NC Drill Files: Excellon format specifying precise coordinates for all through-holes and vias. 3. Bill of Materials (BOM): A structured spreadsheet (.csv or .xlsx) containing Component Designators, Quantities, Footprint packages, Descriptions, and explicit LCSC, DigiKey, or Mouser Part Numbers to guarantee exact matching during automated picking. 4. Component Placement List (CPL / Centroid File): A precise coordinate data file (.csv or .txt) mapping X/Y positions, exact rotation angles, and layer placement (Top/Bottom) for all SMD devices to calibrate automated SMT assembly robots. 5. Stencil Files: Solder paste stencil mask layers (GTP for Top / GBP for Bottom). 6. Assembly Drawings: High-resolution PDF visual layouts clearly identifying component orientations, polarization markers (Pin 1 dots, diode bands, capacitor polarities). 7. Native Design Files: The complete, uncompiled original project structure and schematics from the chosen EDA platform (KiCad, EasyEDA, or Altium Designer) for future design iterations.
Project ID: 40543949
21 proposals
Remote project
Active 6 days ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs

Hi, I am an embedded systems engineer with over 16 years of experience in automotive-grade PCB design, embedded carrier boards, CAN/RS485 interfaces, protected power inputs, isolated sensor inputs, and production-ready manufacturing packages. I understand this is hardware design only, with firmware handled internally, and the Teensy 4.1 pin mapping must be followed exactly. I can design the schematic and PCB for the protected 12V input, 5V buck, auxiliary 3.3V rail, triple CAN-FD transceivers with jumper termination and ESD protection, RS485 direction control, isolated Hall RPM input, INA219/INA226 voltage monitor, USB protection/isolation jumper, and Ethernet MagJack routing. My approach would be to first confirm the mechanical constraints, connector preferences, preferred EDA tool, and target assembly house parts availability, then complete schematic capture, layout, design checks, and generate the full production package: Gerbers, drill files, BOM with supplier part numbers, CPL, paste layers, assembly drawings, and native design files. For this type of automotive test-bench board I would strongly recommend a careful layout review around power, CAN/USB/Ethernet routing, grounding, and protection components before fabrication. A few quick questions: do you prefer KiCad, EasyEDA, or Altium? Do you already have a target board size/enclosure and connector types? Are you open to a 4-layer PCB for cleaner routing and signal integrity? Please contact me to discuss details.
€200 EUR in 14 days
7.5
7.5
21 freelancers are bidding on average €195 EUR for this job

Hi there, I read your offer carefully and understand that this project is strictly for hardware design only: schematic capture, PCB layout, and complete manufacturing files, with firmware excluded. I can design a professional Teensy 4.1 carrier board for your automotive test-bench application, including the required RS485, triple CAN/CAN-FD interfaces, Hall sensor isolation, I2C voltage monitoring, automotive-grade power protection, USB protection, Ethernet routing, and production-ready outputs. I also understand the importance of respecting the exact Teensy pin mapping for compatibility with your internal firmware. With my background in mechatronics, PCB design, Altium Designer, power stages, communication interfaces, and industrial-style board design, I can deliver this efficiently and professionally. I have worked with the hardware blocks and components mentioned in your project and can provide clean native design files, Gerbers, BOM, CPL, stencil files, and assembly documentation ready for fabrication. Just send me a message and we can discuss the details so I can start quickly. Best regards, Samuel Tshibangu
€140 EUR in 7 days
6.4
6.4

Hi, I’m an Embedded Systems and PCB Design Engineer with 6+ years of experience designing automotive and industrial embedded hardware using KiCad. I have experience with STM32, CAN/CAN-FD, RS485, Ethernet, power electronics, and automotive-grade protection circuits. I can develop the complete carrier board for your Teensy 4.1, following your specified pin mapping and hardware requirements, with a focus on signal integrity, EMC, manufacturability, and automotive reliability. The design will include the power stage, triple CAN interfaces, RS485, opto-isolated Hall input, INA219/INA226 monitoring, USB protection, and Ethernet routing. Deliverables: • Complete KiCad schematics and PCB • Gerbers, NC drill, BOM, CPL, and stencil files • Assembly drawings and manufacturing package • Native KiCad project files ready for production Timeline: 2–3 weeks I’m available to start immediately and would be happy to review your mechanical constraints and preferred PCB stack-up before beginning. Best regards, Jesutofunmi Embedded Systems & PCB Design Engineer
€750 EUR in 21 days
6.2
6.2

Hello, I can design the complete industrial-grade Teensy 4.1 automotive diagnostics carrier board exactly around your defined pin mapping and hardware-only scope. I have experience with embedded PCB design, automotive-style protection, CAN/CAN-FD interfaces, RS485 communication, isolated sensor inputs, I2C monitoring, USB protection, Ethernet routing, and manufacturable PCB layouts for JLCPCB/PCBWay assembly. For this board, I will carefully implement the 12V automotive input protection, buck and 3.3V auxiliary rails, three CAN transceiver channels with jumper-selectable termination and ESD protection, RS485 direction control, opto-isolated Hall RPM input, INA219/INA226 voltage monitoring, Teensy Ethernet MagJack routing, and protected USB interface with power-isolation jumper. I will keep the schematic clean, label all interfaces clearly, and route the PCB with attention to grounding, isolation, differential pairs, ESD placement, connector access, and serviceability in a test-bench environment. The final package will include native design files, Gerbers, drill files, BOM with orderable part numbers, CPL/centroid, stencil layers, and PDF assembly drawings with polarity and orientation notes. I can start by reviewing your preferred EDA tool, connector choices, board size constraints, enclosure requirements, and any required fabrication/assembly house rules before completing the production-ready design. Regards,
€140 EUR in 7 days
5.7
5.7

Hi, I have 12+ years of experience in automotive and industrial embedded hardware design using KiCad, Altium Designer, and EasyEDA Pro. I have completed 40+ production-ready PCB projects, including CAN, RS485, Ethernet, and mixed-signal control boards up to 6 layers, achieving first-pass manufacturing success with DRC/ERC-clean deliverables and robust EMI-conscious layouts. Approach ✅ I will review the hardware specification, verify all Teensy 4.1 pin mappings, interface requirements, and component selections before capturing the complete schematic. ✅ I will design the PCB with dedicated power distribution, controlled differential routing for CAN and Ethernet, isolated sensor interfaces, automotive protection circuitry, and optimized grounding for EMC and signal integrity. ✅ I will perform comprehensive ERC/DRC verification, manufacturing rule checks, and generate complete production files including Gerbers, BOM, CPL, assembly drawings, stencil layers, and native design files. ✅ I will validate every interface against the specified firmware pin assignments to ensure full hardware compatibility without requiring firmware modifications. Questions ✅ Do you have a preferred PCB size, enclosure constraints, or connector placement requirements for the carrier board? ✅ Should the Ethernet differential pairs be impedance-controlled according to your PCB manufacturer's stack-up, or do you already have preferred fabrication specifications? Best, Yaroslav
€140 EUR in 7 days
5.3
5.3

⭐⭐⭐⭐⭐ I've carefully reviewed your specification, and I appreciate the level of detail you've provided. This is a well-defined hardware project, and I understand that the scope is strictly limited to schematic capture, PCB layout, and production-ready manufacturing files—no firmware. I have experience designing industrial and automotive-grade electronics, including CAN/CAN-FD, RS485, isolated inputs, switching power supplies, USB/Ethernet interfaces, and EMC-conscious PCB layouts. I'll ensure the Teensy 4.1 pin mapping is followed exactly, implement the required protection circuitry, optimize high-speed routing, and perform thorough ERC/DRC/DFM checks before delivery. Milestones: Schematic capture & design review PCB layout & routing Design verification (ERC/DRC) Manufacturing package (Gerbers, BOM, CPL, NC Drill, stencil, assembly drawings, native files) A couple of questions: • Do you have a preferred PCB size or enclosure constraint? • Which EDA platform would you like me to use (KiCad, Altium, or EasyEDA)? I look forward to helping you deliver a reliable, production-ready automotive carrier board.
€140 EUR in 7 days
5.0
5.0

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
€140 EUR in 7 days
5.2
5.2

With nearly a decade in the field, I am a seasoned Senior Electronics Engineer who specializes in the design, development, and delivery of high-quality hardware solutions for various industries. Your automotive diagnostics project aligns perfectly with my core expertise. Throughout my career, I have worked on designs involving complex routing and routing specific signals to exact pins - skills that will be paramount in executing your hardware layout needs and adhering to your teensy pins routing requirements. My skills also encompass working with power supplies especially automotive-grade which will ensure a reliable reverse polarity safety measure as well as transient suppression for your board's power supply stage. My track record showcases rigorous adherence to safety regulations - delivering robust designs even under challenging scenarios such as high inductive spikes, cranking noises, and more thus, making me the ideal fit for this project. I have an exceptional grasp of MCP2562FD-E/SN transceivers along with profound knowledge of CAN FD protocols, ESD protection diode arrays (PESD1CAN), and dealing with Termination Resistors in CAN channels that you have mentioned. With me on-board, you can expect meticulous attention to detail, adherence to safety and quality standards, efficient project management, and most importantly - a professional grade PCB design that ensures seamless integration with your existing software system. Let's discuss how I can make your automotive diagnostic board project a success!
€140 EUR in 5 days
4.4
4.4

Hey, I see you need a professional, industrial-grade custom carrier board for the Teensy 4.1 to handle automotive diagnostics. With my background in embedded systems and electronics, I can expertly deliver a robust schematic capture and PCB layout adhering strictly to the detailed pin mapping and hardware specs you provided. Your emphasis on reliable power stages, triple CAN bus integration, and isolation techniques aligns perfectly with my skills in microcontroller-based hardware design. I'll ensure the manufacturing files are precisely tailored for automated PCB and SMT assembly houses to streamline your production. I’m ready to start and can deliver the complete design package promptly. Let’s get this project rolling smoothly! What specific automotive test-bench conditions should I consider for thermal and electrical stress during PCB design? Thanks,
€155 EUR in 15 days
4.2
4.2

I have extensive experience designing automotive-grade embedded hardware, high-speed PCB layouts, and microcontroller carrier boards using Altium Designer. Your Teensy 4.1 carrier board will be developed with strict adherence to the required pin mapping, integrating triple CAN-FD transceivers, RS485 communication, I2C voltage monitoring, optically isolated Hall sensor input, Ethernet connectivity, and a robust automotive power supply with reverse polarity and transient protection. The PCB will be optimized for signal integrity, impedance-controlled differential routing, EMI/EMC performance, thermal management, and manufacturability. I will deliver a complete production-ready package including schematics, Altium source files, Gerbers, NC Drill, BOM with supplier part numbers, CPL, stencil files, and assembly drawings, ensuring seamless fabrication and SMT assembly with JLCPCB, PCBWay, or equivalent manufacturers.
€120 EUR in 7 days
4.5
4.5

Hi, I have experience in custom PCB and embedded hardware design, including automotive-grade systems, CAN bus, RS485, I2C interfaces, power management, and microcontroller carrier boards. I can design the complete Teensy 4.1 carrier board according to your exact pin mapping and hardware requirements. I can deliver a production-ready design package including schematics, PCB layout, Gerbers, BOM, CPL, assembly drawings, and native design files optimized for JLCPCB or PCBWay manufacturing. I understand that this project is strictly hardware design only, with firmware excluded from the scope.
€140 EUR in 2 days
0.0
0.0

I can take this on and deliver the hardware-only Teensy 4.1 carrier board with the exact pin mapping, automotive power protection, triple CAN, RS485, isolated RPM input, I2C voltage sensing, USB protection, and Ethernet routing you specified. I’ll provide a clean, fabrication-ready package with schematics, PCB layout, Gerbers, BOM, CPL, assembly drawings, and native design files optimized for JLCPCB or PCBWay. Jared
€155 EUR in 2 days
0.0
0.0

Hi There, I am excited about your project to design an industrial-grade custom carrier board for the Teensy 4.1 microcontroller, specifically for the automotive test-bench environment. With over 6 years of experience in Electronics and Embedded Systems, I specialize in PCB Layout and Design, making me confident in developing the robust hardware you require. I have extensive knowledge of critical components like the RS485 communication interface and CAN Bus, along with experience in designing power supply circuits that address automotive-grade specifications, including reverse polarity protection and transient suppression. You can view my past projects and skills through the following links: https://www.freelancer.com/u/haseebsidd07 I aim to provide a turnkey manufacturing package, including Gerber files, BOM, and assembly drawings, ensuring seamless submission to PCB fabrication and assembly houses. I look forward to the opportunity to collaborate on this project. Thank you, Regard, Abdul Haseeb Siddiqui
€30 EUR in 7 days
0.0
0.0

Okay, I got what you want exactly. I am a Full Stack Engineer Embedded Engineer & PCB Designer with 12+ years of experience, providing automotive PCB design, mixed-signal hardware, CAN/RS485 interfaces, power supply design, and production-ready PCB layouts using Altium, KiCad, and EasyEDA. In my opinion, the success of this board depends on reliable automotive protection and clean signal routing rather than simply connecting the required interfaces. I'll design the carrier board with proper power integrity, EMI-aware layout, Ethernet differential routing, and robust CAN/RS485 implementation while maintaining full compatibility with your Teensy firmware pin mapping. This project is very similar to my previous works. ✅ So, I will divide your project into three major steps. 1️⃣ Review the specifications, validate components, footprints, and Teensy pin mapping, then complete the schematic. 2️⃣ Design and verify the PCB with optimized placement, routing, power distribution, and full DRC/ERC checks. 3️⃣ Deliver Gerbers, BOM, CPL, NC Drill, stencil files, assembly drawings, and native design files ready for JLCPCB or PCBWay. Via private chatting or meeting, I will provide creative ideas and the best technical solution for your project. Best regards. Maksym
€140 EUR in 7 days
0.0
0.0

Hi, I read through your project for Custom Teensy Automotive Diagnostics Board. You need help with custom teensy automotive diagnostics board. I can build and deliver this efficiently based on the job requirements. This fits well with my experience in Automotive Engineering, Electrical Engineering, and PCB Design and Layout. I can take what you outlined and turn it into a clean final delivery, with attention to Automotive Engineering and Electrical Engineering and the details in your brief. I will keep the implementation clean, practical, and aligned with your requested scope. Send me the details and I can start immediately.
€30 EUR in 1 day
0.0
0.0

Hey, I think you would like to read this: Your project to design a custom Teensy automotive diagnostics board caught my attention. I specialize in industrial-grade PCB design, particularly for automotive applications. I propose to create a robust carrier board tailored to your specific needs. By leveraging my skills, you can expect a high-quality, results-driven solution that precisely meets your requirements. I would like to discuss more about the project. If milestones are created, your payment will be fully protected, ensuring a risk-free collaboration. You can also use this message as proof for a full refund if needed. Deliverables: 1. Complete Gerber Files 2. NC Drill Files 3. Bill of Materials (BOM) 4. Component Placement List (CPL) 5. Stencil Files 6. Assembly Drawings 7. Native Design Files Looking forward to the opportunity to work on this exciting project with you. Kind Regards, Riyaat
€150 EUR in 7 days
0.0
0.0

GIVE ME 30 SECONDS TO SHOW YOU WHY I'M THE RIGHT FIT FOR THIS PROJECT. I recently completed a similar project designing an industrial-grade custom PCB for automotive data acquisition. The result? Increased data accuracy and real-time monitoring capabilities. I have extensive experience in hardware design, specifically in creating complex PCB layouts for automotive environments. My expertise aligns perfectly with the requirements of your Teensy automotive diagnostics board project. Understanding your need for precise data collection and transmission, my approach would focus on robust hardware design, efficient power management, and seamless integration of all required interfaces. The difference between an average result and an exceptional one is usually decided before the work even begins. Regards, Patrick
€150 EUR in 7 days
0.0
0.0

BUCHAREST, Romania
Payment method verified
Member since May 25, 2015
€750-1500 EUR
$8-15 USD / hour
€250-750 EUR
€1500-3000 EUR
min $50 USD / hour
$250-750 CAD
$10-30 USD
₹1500-12500 INR
$750-1500 USD
₹12500-37500 INR
$30 USD
$10-30 USD
min $50 AUD / hour
₹1500-12500 INR
₹12500-37500 INR
₹1500-12500 INR
$30-250 USD
₹1500-12500 INR
$250-750 USD
₹600-1500 INR
₹150000-250000 INR
₹1500-12500 INR
$750-1500 USD
$25-50 USD / hour