Hire the Best ESV Digital V6 Specialists

I am an electronics and firmware developer with experience in PCB design, firmware development, prototyping and SMD assembly. My journey started with hand crafting single sided PCBs — giving me a strong practical foundation from the ground up. PCB Design: 2 and 4 layer PCB design in KiCad 8,Kicad 9(Soon migrating to Kicad 10) & EasyEDA(Standard & Pro version) . Former EagleCAD user Schematic to manufacturing ready layout Custom footprint creation Gerber, drill, pick and place and BOM files Full submission support for JLCPCB(PCB & PCBA) and similar manufacturers Assembly & Prototyping: SMD soldering — 1206-0402 passives, QFN, TSSOP (except BGA) Through hole soldering Small batch prototype assembly Component procurement support Firmware & Connectivity: Microcontrollers — ESP32, ESP8266, Arduino, AVR, 8051 Cellular — Quectel EC25 & SIMCom SIM7672 with MQTT SSL/TLS Wireless — LoRa, WiFi, Bluetooth, GSM GPS — Ublox & Quectel module integration Displays — OLED, TFT, capacitive touch Protocols — I2C, SPI, UART, MQTT SSL/TLS, HTTP REST Motor drivers, WS2812 LED arrays, power circuits GPS- Quectel L89, Ublox M10S Special - WS2812 Led Projects include: GPS trackers, GSM security systems, water level controllers, , line followers, obstacle detection robots, WS2812 LED arrays and various ESP32 and Arduino IoT devices. I am a full time freelancer committed to clear communication and timely delivery — working with hobbyists, startups and commercial clients alike. Feel free to reach out!

About Me I am a professional PCB Designer with extensive Altium, Kicad and EasyEDA experience, delivering commercial and non-commercial hardware projects . I create reliable, production-ready, and cost-optimized multilayer PCB designs tailored to client requirements, while ensuring signal integrity, power integrity, controlled impedance, and EMI mitigation. All files are manufacturing-ready for JLCPCB and other PCB factories, including Gerbers, BOMs, and assembly files. I focus on providing efficient, high-quality solutions that meet both technical and budgetary requirements. 🔑My Key Services ✅ Complete Schematic Design based on client requirements ✅ Multilayer PCB Layout with industry best practices (EMI/EMC, impedance control, spacing rules) ✅ BOM Creation + Cost Optimization while keeping parts available and affordable ✅ PCB designs compatible with JLCPCB and other manufacturers, with BOM & CPL files ready for assembly. ✅ Prototyping Support and design review ✅ RF, Antenna, and High-Speed PCB design ✅ Designing a PCB from a problem statement (from concept → prototype → production) ✅ Support in placing PCB & PCBA orders on JLCPCB and other Manufactories Projects I Have Completed ✅ ESP32 and ESP8266 development boards ✅ STM32 custom boards (Blue Pill, Black Pill, Maple, custom designs) ✅ ATmega-based commercial products ✅ Buck/Boost power supply designs ✅ USB 2.0 / 3.0 hardware ✅ Motor drivers, relays, sensors, IoT controllers Applications & Special Expertise ✔ I2C, SPI, UART ✔ RF & Antenna tuning ✔ DC-DC converters (Buck/Boost/LDO design) ✔ Low-noise analog design ✔ Power integrity & thermal optimization Final Deliverables ☑ Source files (PCB + Schematic) ☑ Gerber files for manufacturing ☑ BOM (cost-optimized + alternatives) ☑ Pick & Place files ☑ PDF documentation

Hi! This is Efrain Manuel L. I have been working as a Professional PCB Designer and an Embedded System Expert for more than 6 years. I have been working in the field of Designing & Implementing : ☑️ Circuit, PCBs for both Commercial and Industrial purposes. ☑️ Microcontroller Based Projects. ☑️ IOT-based automation Projects. ☑️ Projects Related to Robotics. ⚡I have graduated in Electrical & Electronic Engineering (EEE). ⚡I have been collaborating on high-complexity long-term projects with various clients worldwide. ☑️ Through this profile, I Provide the Following Services: ✔ Schematic Design ✔ PCB Design (1/2/4/6/8 Layers) ✔ Gerber Export ✔ BOM Validation & Sourcing ✔ 3D CAD Design of PCB (.obj /.step) ✔ Reverse Engineering (PCB to New Schematic) ✔ Custom Symbol & Footprint from Datasheet ✔ Microcontroller Based PCB Design ✔ Writing code for the specific microcontrollers ☑️ I have implemented lots of microcontroller-based projects using Arduino, ATMEGA Series, STM32, NODEMCU, ESP8266, and ESP32 series. Why You Should Hire Me: ☑️ On-time delivery with the Best quality for every project at a reasonable rate ($). ☑️ Assist With PCB Fabrication. ☑️ 100% Guarantee on Customer Satisfaction. ☑️ 24/7 Support After Project Completion (Free of Charge) So, what are you waiting for? If you have any Ideas and PCB Design related projects or any Microcontroller based projects give me a knock as soon as possible. I assure you.

⭐ I am an Embedded Systems Engineer with 5+ years of experience designing embedded hardware, production-ready PCBs, firmware, and IoT devices for industrial, wireless, sensor, and battery-powered applications. I support projects from system architecture and component selection through schematic design, PCB layout, firmware development, prototyping, testing, and manufacturing handoff. ➤ 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 ✔ Embedded systems architecture ✔ PCB design and electronic hardware development ✔ Embedded firmware in C and C++ ✔ IoT and wireless device development ✔ Low-power and battery-powered systems ✔ Industrial controllers and sensor nodes ✔ Hardware debugging, testing, and optimisation ➤ 𝗣𝗖𝗕 & 𝗛𝗔𝗥𝗗𝗪𝗔𝗥𝗘 𝗗𝗘𝗦𝗜𝗚𝗡 ✔ Schematic capture and circuit design ✔ Single-layer, double-layer, and multilayer PCB layout ✔ Analog, digital, mixed-signal, RF, and power electronics ✔ Component selection and BOM optimisation ✔ Signal integrity, grounding, thermal, and EMI/EMC considerations ✔ DFM, DFA, and DFT review ✔ Gerber, BOM, CPL, fabrication, and assembly files ➤ 𝗘𝗠𝗕𝗘𝗗𝗗𝗘𝗗 𝗙𝗜𝗥𝗠𝗪𝗔𝗥𝗘 ✔ ESP32, STM32, Nordic nRF52 and nRF53 ✔ Embedded C and C++ ✔ FreeRTOS and Zephyr ✔ UART, SPI, I²C, CAN, RS-485, USB, and Modbus ✔ Sensor, display, motor, and communication integration ✔ Low-power modes, debugging, and hardware bring-up ✔ Real-time control and data-acquisition systems ➤ 𝗜𝗢𝗧 & 𝗪𝗜𝗥𝗘𝗟𝗘𝗦𝗦 ✔ Bluetooth Low Energy and Wi-Fi ✔ LoRa and LoRaWAN ✔ LTE-M and cellular IoT ✔ MQTT, HTTP, and HTTPS ✔ Remote monitoring and wireless sensor systems ✔ IoT gateways and connected industrial devices ➤ 𝗧𝗢𝗢𝗟𝗦 ✔ Altium Designer ✔ KiCad ✔ EasyEDA ✔ STM32CubeIDE ✔ ESP-IDF ✔ nRF Connect SDK ✔ PlatformIO ➤ 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗬 / 𝗗𝗢𝗠𝗔𝗜𝗡 ✔ IoT & Smart Devices ✔ Wearables Devices ✔ Industrial Automation ✔ RF & Wireless Systems ✔ Embedded Control Systems ✔ Sensor & Monitoring Systems ➤ 𝗪𝗛𝗔𝗧 𝗬𝗢𝗨 𝗥𝗘𝗖𝗘𝗜𝗩𝗘 ✔ Complete hardware and firmware source files ✔ Organised schematics and PCB layouts ✔ Manufacturing-ready PCB documentation ✔ Clear technical documentation ✔ Prototype testing and debugging support ✔ Support from concept through production handoff ⭐ Share your requirements, block diagram, schematic, PCB files, firmware, or prototype details. I will review the project, identify the main technical risks, and recommend a practical development approach. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀 Embedded Systems, PCB Design, Firmware Development, Embedded Firmware, Hardware Design, Circuit Design, ESP32, STM32, Nordic nRF52, Altium Designer, KiCad, EasyEDA, Embedded C, C++, FreeRTOS, Zephyr, IoT Hardware, BLE, Wi-Fi, LoRaWAN, LTE-M, MQTT, Power Electronics, Multilayer PCB, Signal Integrity, DFM, Industrial Automation, Sensor Systems, Hardware Prototyping 𝗛𝗮𝘀𝗵𝘁𝗮𝗴𝘀 #EmbeddedSystems #PCBDesign #FirmwareDevelopment #EmbeddedFirmware #HardwareDesign #ESP32 #STM32 #NordicnRF #AltiumDesigner #KiCad #IoTHardware #PowerElectronics #IndustrialAutomation #EmbeddedC #ProductDevelopment

I help companies design, debug, and optimize complex electronic hardware, particularly PCB systems involving high-speed interfaces, RF, signal integrity, power architecture, and difficult manufacturing or validation problems. My work ranges from focused PCB design reviews and troubleshooting to complete hardware development, including system architecture, component selection, schematic capture, multilayer PCB layout, simulation, prototype bring-up, validation, and manufacturing release. I have five years of industrial, freelance, and academic engineering experience, including two years in R&D at Furukawa Electric. My background spans hardware development, validation, QA, and test engineering, giving me practical experience with the problems that appear not only during PCB design, but also during fabrication, assembly, bring-up, environmental testing, and field operation. A recent project involved the electromagnetic simulation and optimization of a GMSL2 serializer-to-FAKRA PCB interconnect up to 6 GHz. I developed a reproducible KiCad-to-openEMS workflow and evaluated transmission-line geometry, connector launches, vias, anti-pads, reference-plane transitions, S-parameters, impedance, and return loss to identify practical improvements before hardware validation. My main areas of work include: — RF, high-speed, and controlled-impedance PCB design — Signal integrity and electromagnetic simulation — PCB design review and troubleshooting — RF interconnect and connector-launch optimization — Multilayer, BGA, and mixed-signal hardware — Power architecture and low-power electronics — Prototype bring-up, debugging, and validation — DFM, DFA, DFT, and manufacturing release I also develop embedded and IoT hardware involving STM32 and ESP32 platforms, cellular and wireless connectivity, industrial communication interfaces, sensors, battery-powered systems, and mixed-signal circuitry. My project experience includes GMSL2, LTE/NB-IoT, GNSS, LoRaWAN, CAN, RS-485, Ethernet, I²C, SPI, UART, BLE, Wi-Fi, industrial telemetry, RF gateways, sensor interfaces, analog audio electronics, and embedded control systems. Depending on the project, I can deliver: — System architecture and engineering recommendations — Schematics and multilayer PCB layouts — Stackup and controlled-impedance requirements — PCB design reviews and technical risk assessments — BOMs and component sourcing alternatives — Gerber, drill, pick-and-place, and manufacturing files — Electromagnetic simulation models — S-parameter and Touchstone files — Prototype bring-up and debugging support — Test procedures and validation plans — Engineering reports and manufacturing documentation My designs consider return-current paths, grounding, impedance discontinuities, EMI/EMC risks, power integrity, thermal behavior, component availability, assembly limitations, test access, and practical debugging from the beginning. The objective is not simply to produce a PCB that passes design-rule checks. It is to reduce board revisions, manufacturing problems, and unexpected behavior during validation. My main engineering tools include KiCad, Altium Designer, openEMS, Python, EasyEDA Pro, and ParaView. I maintain my own electronics laboratory with an oscilloscope, spectrum analyzer, bench equipment, soldering and rework tools for prototype assembly, bring-up, troubleshooting, and validation. I am based in Brazil and maintain strong working-hour overlap with clients in the United States and Europe. If you have a new hardware design, a PCB approaching fabrication, or an existing board that is not performing as expected, send me the schematics, PCB files, requirements, or current test results. I can review the design, identify the main technical risks, and recommend the most effective path forward.

I turn ESP32 ideas into boards you can actually manufacture. Schematic, PCB layout, production files, firmware. If you have a concept, a half-finished design, or a prototype that does not work, I can take it to a product that ships. What I do Hardware: schematic design and PCB layout in KiCad and EasyEDA, DRC clean Gerbers, BOM and Pick-and-Place ready for JLCPCB, AC/DC power circuits, battery and LiPo charging, sensor integration, thermal and low-power design. Firmware: ESP32 and ESP32-S3 in ESP-IDF and Arduino, LVGL touch interfaces, MQTT, BLE, Wi-Fi provisioning, OTA updates, deep sleep for battery products, payment integration. Cloud side when you need it: MQTT broker, database, and a web dashboard so the device is useful outside the lab. I work in your files, not only mine. Send me a KiCad project and you get a KiCad project back, with the libraries and footprints in place. Same for EasyEDA. If you need to move a design from one to the other, I can do that too, including symbol and footprint cleanup so the netlist survives the trip. Delivered 220V smart relays, environmental monitoring boards, sonar driver modules, vending machines and payment terminals, hydroponic and greenhouse controllers, USB-C rechargeable LED products, coin-cell LCD instruments, camera boards for remote monitoring, DMX controllers for cinema equipment. How I work I ask questions before I draw anything, because most board problems come from a wrong assumption, not a wrong footprint. You see the schematic before I start layout. You get documentation with pinouts, connector tables, and assembly notes, not just files. And I stay available during bring-up, since that is where the real issues appear. I also take over broken designs. Several clients came to me with a board that did not power up or a regulator wired wrong, and left with a working revision. Tell me what you are building and what it has to do. I will tell you honestly whether I am the right engineer for it, and what it will realistically take.