ESP32-S3 to TI-84 PCB

@Mahihassi

As an experienced Electrical Engineer with a specialization in embedded systems, PCB design, and IoT product engineering, I am confident in my ability to undertake your compact PCB project effectively. My familiarity and expertise with microcontrollers such as ESP32 and TI Tiva, as well as my proficiency in chosen tools like Altium Designer and KiCad, make me a strong fit for this task. Additionally, I have adeptly produced robust power systems and regulated numerous designs to optimize performance while minimizing power consumption, just what you require. My broad skill set includes areas like RF hardware design which proves valuable for your camera integration needs. Moreover, my proficiency in AI/ML translates into intelligent algorithm development that enhances device functions. These are essential for provisioning your desired features such as OCR processing/image capture. Not to mention the other system checks; my capabilities in firmware programming will allow me to thoroughly test the board's features, ensuring every aspect is working to your satisfaction. Having worked through the entire product development workflow many times before - from roducing prototypes to final products - I understand what it takes to deliver successfully within stipulated parameters.

@engrusmanfaiz

camera and Wi-Fi operation. I understand the TI Link / CBL2 protocol requirements and the importance of using protected bidirectional open-drain style signaling instead of UART/I2C-style interfacing. The design will include proper TIP/RING conditioning with current limiting, ESD protection, GPIO-safe level handling, and hot-plug protection to avoid damage to either the calculator or ESP32-S3. For power integrity, I will implement low-noise regulation, reverse-polarity and backfeed protection, and sufficient bulk/decoupling capacitance for ESP32 Wi-Fi and camera current spikes. Special attention will be given to antenna keepout, camera stability, low quiescent current, and calculator-shell-friendly mechanical placement. The PCB will include UART/debug headers, labeled test points, spare GPIO access, and hand-assembly-friendly footprints where practical. Deliverables will include schematic, PCB layout, Gerbers, drill/CPL/BOM files, assembly outputs, and a concise design report covering power architecture and protection strategy. I can also provide a simple hardware validation firmware or test routine to verify ESP32 boot, TI Link communication, camera capture, and Wi-Fi coexistence stability. I have experience with ESP32 hardware, mixed-signal embedded layouts, protected communication interfaces, and production-ready IoT PCB development.

@mairajali11

As an experienced electrical engineer and certified EasyEDA designer, I have a proven track record of delivering top-notch PCB designs that excel in reliability, stability, and power efficiency - all of which this project demands. I've clocked over 8 years honing my skills in circuit design and board layout using tools like Eagle, Altium, KiCAD, and EasyEDA itself. Rest assured, you’d receive comprehensive KiCad or Altium schematic and PCB layout files with BOM and Gerbers that are ready for fabrication. For added transparency, I'll provide a design report elucidating the entire process. Being an expert in embedded systems design (a forte defined by proficiency in Arduino) and familiar with Link / CBL2 protocol through TIP/RING lines, I assure you uncompromised TIP/RING communication while ensuring the safety of both your TI-84 calculators and the ESP32-S3. Moreover, my previous experience with cameras seamlessly working on PCBs will ensure preserved camera operation and image reliability to meet your expectations. Additionally, being aware that power, performance, and memory are key concerns here - my considerable experience allows me to utilize even known assumptions and risks efficiently bring those into account. Don't hesitate to turn your ideas into reality! Let's discuss how best I can actualize your project requirements!

@ovaisiq

Hi, I have designed boards with Seeed XIAO modules. I can show in messages. Or we can also make it with any ESP32-S3 module. I can do this for you in KiCAD. I am using version 9 and 10. Let me know if you like to discuss further. Thanks

@leonidye

Hi, I can design a compact, production-ready PCB that integrates the Seeed Studio XIAO ESP32-S3 Sense with a TI-84 Link port, prioritizing electrical safety, communication reliability, and stable ESP32 camera/Wi-Fi operation. I possess expertise in ESP32 hardware, low-voltage protection interfaces, Li-ion battery systems, EMI-aware PCB layout, and mixed-signal embedded design. The TIP/RING interface will employ appropriate open-drain voltage regulation, level-shift protection, ESD suppression, current limiting, and reverse-current protection to ensure the safe operation of both the calculator and the ESP32-S3. I will pay particular attention to power stability—including regulator selection, decoupling strategies, handling transient responses to Wi-Fi/camera current spikes, and optimizing for minimal antenna interference to ensure robust RF performance. I can deliver a complete package comprising schematics, PCB layouts, a production-ready Bill of Materials (BOM), Gerber files, assembly outputs, and a concise design report covering protection strategies, current estimates, and layout considerations. Additionally, I will incorporate practical debug/test points—covering UART, camera capture, Wi-Fi stability, and TI Link communication—along with basic hardware verification procedures. I am ready to begin work immediately and can deliver a clean, manufacturable design that meets professional embedded hardware standards. Regards.

@mzdesmag

Hello sir, Did go through your job description and glad to share that I have enormous experience in working with ESP32-S3 to TI-84 PCB I'm a seasoned programmer and Engineer with quality experience in Flutter, React, Node.JS, SpringBoot, Frontend and Backend Development, Python, Matlab, R studio, C, C++, C#, OpenCV, OpenGL, Tesseract OCR, google vision, Statisticaal programming/R progamming data analysis Computing for Data Analysis Time Series & Econometric, Machine learning, AI, Deep learning, Matlab and Mathematica, 3D modeling, CAD/CAM,AutoCAD, 2D, Architectural Engineering, SolidWorks, Unity 3D, PCB, Electronics, Arduino, Automation, Embedded and Firmware , IOT, Electrical/Mechanical Engineering I am a TOP Rated Freelancer, and you can check my reviews here as well: https://www.freelancer.com/u/mzdesmag. Looking forward to potentially working together on this project. Thanks and Best regards, Adekunle.

@yaroslavmark

Hi, I reviewed your XIAO ESP32-S3 Sense + TI-84 interface project and it aligns strongly with my experience in embedded hardware, protected mixed-voltage interfaces, and compact ESP32-based PCB design. I’m an embedded systems engineer with 15+ years of experience designing production-ready IoT hardware including ESP32-S3 systems, battery-powered devices, protected communication interfaces, RF-aware layouts, and compact KiCad PCB integrations. Approach: ✅ I will design a robust power architecture with protected Li-ion input, low-IQ regulation, backfeed prevention, surge suppression, and stable decoupling sized specifically for ESP32-S3 Wi-Fi and camera current transients. ✅ I will implement a protected TI Link / CBL2 interface using level-safe bidirectional TIP/RING conditioning, ESD protection, current limiting, and open-drain signaling compatible with TI-84 electrical behavior. ✅ I will optimize PCB layout for antenna keepout, camera stability, low-noise grounding, and compact calculator integration while preserving reliable RF and image-capture performance. Questions: ✅ I need to confirm whether the board will primarily run from Li-ion power or if calculator-side power should support partial/full operation. ✅ I want to verify expected mechanical constraints inside the TI-84 shell, including maximum PCB thickness and connector placement. Best, Yaroslav

@tetianam8

⭐⭐⭐⭐⭐ Hello, This is a well-defined embedded hardware project and very achievable with a robust, production-oriented approach. I have experience with ESP32-S3 hardware, protected bidirectional interfaces, low-power power-path design, and compact KiCad PCB layouts intended for real-world handheld devices. For the TI-84 TIP/RING interface, I would implement a protected open-drain architecture using level-safe MOSFET/transistor conditioning, series current limiting, and low-capacitance ESD protection so hot-plugging the calculator cable cannot damage either side. I understand the TI Link / CBL2 protocol is not UART/I²C and requires proper bidirectional line behavior. For power integrity, I’d separate: • ESP32/camera transient loads • battery/input path • TI link-side protection domain This helps avoid brownouts during simultaneous Wi-Fi + camera activity. I’d also maintain strict antenna keepout around the XIAO ESP32-S3 Sense and use careful grounding/decoupling to preserve RF performance. Deliverables: • KiCad schematic + PCB source • Production-ready Gerbers/PnP/BOM • ERC/DRC-clean design • Design report covering protection, current budget, and layout rationale • Hardware validation procedure/test firmware for boot reliability UART flashing TIP/RING packet exchange camera capture Wi-Fi stress validation I can also help optimize the mechanical footprint for TI-84 shell integration while keeping assembly practical and serviceable. Best regards.

@engrhasan01

Are you looking for a compact, reliable PCB that integrates Seeed Studio XIAO ESP32-S3 Sense with a TI-84 Plus link port, with robust power design, protected TI Link communication, and production-ready deliverables? I’m an Electrical and PCB Design Engineer specializing in embedded hardware, PCB design, and compact battery-powered systems. I have experience in mixed-signal layouts, ESP32-based products, and protected interface design for sensitive external devices. Approach • Design protected open-drain TIP/RING interface for TI Link/CBL2 • Add ESD, current limiting, reverse/backfeed protection • Optimize power rail for Wi-Fi + camera peak loads • Respect antenna keepout and RF layout practice • Include production outputs and validation procedure • Provide clean BOM with currently available components Deliverables • Full schematic + PCB source files • Gerbers + drill + assembly outputs • BOM with MPN references • STEP 3D board model • Design report • Test procedure / bring-up support Additional value I can also review interface options for improving reliability around hot-plugging and line contention, since TI TIP/RING requires careful conditioning compared with standard UART/I²C. The board can be optimized for hand assembly while remaining production-ready for future scaling. Best regards, Hasan

@ahmedy607

Hello, I’ve worked on multiple ESP32-based PCB designs before, including power management, protected communication interfaces, and compact embedded layouts. You can check my portfolio for similar hardware projects. I can design a compact, production-ready PCB for the XIAO ESP32-S3 Sense with a protected TI-84 TIP/RING interface while keeping power stability, ESD protection, antenna keepout, and camera reliability in mind. The design will include: * Safe Li-ion power architecture and protection * Stable 3.3V regulation for ESP32-S3 + camera load spikes * Protected TIP/RING interface for TI Link / CBL2 communication * ESD, current limiting, and backfeed protection * UART/debug headers and labeled test pads * Compact layout optimized for assembly and calculator integration Deliverables will include the full KiCad/Altium project, fabrication files, BOM, assembly outputs, and a brief hardware validation/test procedure. Ready to start once you share any mechanical constraints or preferred connector details.

@ammark477

The fastest path to a reliable connection between the ESP32-S3 and the TI-84 is a meticulously designed PCB that prioritizes both performance and protection. Your project needs a board that expertly handles power delivery while ensuring consistent communication through the TI Link/CBL2 protocol, and I can help deliver that. My approach focuses on creating a compact and safe power system, integrating reverse-polarity and over-current protections while keeping quiescent current low. For the TI-84 communication, I’ll ensure proper level-shifting and ESD protection to prevent damage during operation. With a solid background in electronics design and numerous successful PCB projects behind me, I understand how to balance complexity and reliability. As a part of this project, I would suggest considering more robust test points that could make initial debugging much easier. I can deliver complete KiCad or Altium files, along with BOM and assembly outputs, within 30 days. Can we hop on a 10-minute call this week?

@salahuddin1973

Hello I can design your PCB as a reliable embedded hardware system combining the XIAO ESP32-S3 Sense and TI-84 link port with a strong emphasis on power stability, signal protection, and long-term durability. The design will include a clean power subsystem with proper regulation, decoupling for camera + Wi-Fi loads, and full protection against reverse polarity, backfeed, and current spikes. The TIP/RING interface will be implemented using safe open-drain style circuitry with ESD protection and controlled current limiting to ensure safe interaction with the TI-84 link port under all conditions. I will also ensure RF-safe PCB layout with proper antenna clearance, provide full manufacturing-ready outputs KiCad/Altium + Gerbers + BOM + assembly files and include a structured test plan covering boot reliability, communication validation, and camera/Wi-Fi stability under load. do you want the board to support simultaneous USB + battery operation, or should USB be strictly for programming only? Portfolio: https://www.freelancer.pk/u/salahuddin1973 Best regards Naufal

@mayr81

Hi there! I’m Cora May, and I can design a compact, production-ready KiCad/Altium PCB that reliably integrates the Seeed XIAO ESP32-S3 Sense with the TI-84 two-wire TIP/RING link port for the TI Link / CBL2 protocol. With your focus on power safety and protection, I’ll create a robust power architecture (reverse-polarity, over-current, low-quiescent battery behavior, and anti-backfeed) plus heavy decoupling tailored for ESP32 Wi‑Fi and the camera’s spike currents. For TIP/RING, I’ll implement a level-safe interface for 3.3 V GPIO using proper current limiting, ESD protection, and open-drain/open-collector style conditioning so cable hot-plugging can’t damage either device. The layout will preserve the ESP32 antenna keepout while keeping camera and Wi‑Fi stability in mind, and I’ll add clear silkscreen labels and test pads for 3.3 V, GND, TIP, RING, key rails, and selected spare GPIOs. I’ll also include UART programming/debug access and a basic test firmware/procedure to verify boot, link packet echo/exchange, camera capture, and Wi‑Fi operation without brownouts,

@DngPhgNam

⭐⭐⭐⭐⭐ ✅Hi there, hope you are doing well! I have experience designing compact, production-ready PCBs integrating microcontrollers with specialized communication interfaces, ensuring power stability and signal integrity with minimal quiescent current. From my experience, the most critical part is ensuring robust power regulation with effective protection and reliable, level-safe communication on TIP/RING lines to prevent damage. Approach: ⭕ I will design a PCB that provides safe power input with reverse polarity and over-current protection. ⭕ Implement level-shifting and ESD protection for TIP/RING lines to ensure safe communication. ⭕ Optimize layout to keep antenna areas free and maintain power stability for camera and Wi-Fi. ⭕ Include clear silkscreen labeling, debug hooks, and test pads for thorough testing. ⭕ Deliver complete schematic, layout, BOM, fabrication files, and test firmware as specified. ❓ Could you please confirm the specific battery voltage and connector types you prefer for power input? ❓ Do you have any specific preferences on components for hand-assembly tolerances? ❓ Is there a target maximum PCB size or thickness beyond the compact footprint noted? I am confident in delivering a reliable design that integrates the ESP32-S3 Sense with the TI-84 link port, meeting your detailed requirements with high-quality results. Kind regards, Nam

@haymov

We've just completed a similar project. We recently helped a client develop a compact embedded hardware solution that required stable power delivery, protected communication lines, and reliable wireless performance in a tight enclosure. I can help you build a production-ready PCB that keeps the ESP32 stable under camera and Wi-Fi load, while ensuring the TI link interface is electrically safe, reliable, and easy to manufacture and test. My focus is on clean layouts, protection design, power integrity, and long-term reliability. I'd love to chat about your project! the worst that can happen is you walk away with a free consultation. Regards, Abdul.

@matteoz0

I can design a compact, production-ready KiCad PCB around the XIAO ESP32-S3 Sense with a robust TI-84 TIP/RING interface and protected power architecture. My experience includes ESP32 high-current layout, Li-ion power management, ESD-safe bidirectional signaling, and compact embedded designs optimized for hand assembly and reliable field operation. I will deliver fabrication-ready files, BOM, validation procedures, and clean documentation focused on reliability, protection, and stable camera/Wi-Fi performance.

@dieterj1

Your project requires more than simple ESP32 integration because the TI-84 link port uses a sensitive bidirectional TI Link/CBL2 signaling method. I can build a safe open-drain interface with proper level protection, current limiting, ESD handling, and backfeed prevention while maintaining stable ESP32-S3 camera and Wi-Fi operation. The final deliverables will include a clean schematic, DRC/ERC-passed PCB, production outputs, and hardware validation support.

@megumit4

This project aligns well with my embedded PCB design background involving ESP32 systems, protected low-voltage interfaces, and battery-powered hardware. I can implement a robust TIP/RING interface compatible with TI Link/CBL2 signaling while ensuring the ESP32 GPIO remains fully protected from hot-plugging, ESD events, and incorrect voltage exposure. The board will be optimized for manufacturability, debugging access, and dependable real-world operation.

@marcusd39

Dear Client, How are you? I hope this proposal finds you well. I'M A CERTIFIED & EXPERIENCED EXPERT This is to inform you that I have KEENLY gone through your project description, CLEARLY understood all the project requirements as instructed in your project proposal and this is to let you know that I will perfectly deliver as desired. Being in possession of all stated required skills as this is my field of professional specialization having completed all certifications and developed adequate experience in the respective field, I hereby humbly request you to consider my bid for professional, quality and affordable services that meet all your requirements. I always guarantee timely delivery and unlimited revisions where necessary hence you are assured of utmost satisfaction when working with me. Please send me a message so that we can discuss more and seal the project. WELCOME.