TL Solutions Solving real-world RF problems… While my official Title is an RF Engineer and I design things, most of the effort in any project is to fix things that don’t work. And even when they do work, there are noise and EMI issues that the FCC or CE bodies don’t appreciate. Once the PCB is designed you are limited – amazing what a different component type, ground strap, ferrite coil or ferrite elastomer sheet can solve. Of course one starts with a basic design – specifications, component selection, circuit lineup, matching, antenna selection, etc., but the work does not end there. I have a fully equipped lab with Lingren Shielded room for sensitive measurements. A quiet zone using pyramidal foam can make the room look like an open field. This is very helpful in testing antennas or receivers. Many products need to operate over extended temperature ranges. Parts that are hot at 25C will burn up at higher temps. Our thermal imaging camera can pinpoint exactly what gets hot and how - what the heat flow path is. For more exact measurements we use a battery of LabView controlled thermocouples. We have a lot of experience in thermal mitigation weather its TIM selection or other mechanical mitigations. Often there are too many things to measure at once - our data collection/automation with Labview allows detailed comparison of many variables over extended time periods. Relationships with Certification labs allow us to determine just what is needed to comply or possible work-arounds. We are good-natured and easy to work with, look forward to helping you. 5 Patents RF engineering services, specializing in: • RF circuit design, matching, antennas • High-speed digital circuits/PWB design • EMC/EMI solutions. • Noise mitigation • Low-noise, small form-factor wireless transceivers • FCC/CE Certifications • Thermal Measurements/Mitigation • Measurement Automation • Optical We have a fully equipped laboratory to do any of the above work: • EMC Chamber (Lindgren RFD60 8x12x7) • Keysight Spectrum Analyzer (MXA9020A, 20Hz - 26.5GHz) • RS Spectrum Analyzer (FSQ26, 20Hz - 26.5GHz) • Keysight Signal Generator (MXG5182B, 9kHz – 6GHz) • Waveforms on generators (WIFI, LTE, Signal Studio DFS RADAR profiles) • Rohde-Schwarz VNA (ZVB8, (300kHz - 8GHz) • Litepoint IQxel (WIFI 802.11ac, Bluetooth, Zigbee, Z-wave) • LoRaWAN Tester (RWC5020B) • Oscilloscopes (Tektronix MSO 5204B) • Thermal imaging camera (Flir SC600) • Control system for multiple thermistors. • Temperature Chamber (Test Equity Model 140) • Various current loop probes, 100M-3GHz • Various antennas, 30Hz – 12GHz Previous work: • Wireless Access Point RF section with IoT (5.7GHz, 5.2GHz, 2.4GHz) and 5G/NR backhaul. • SMPS noise reduction for 4G/5G LTE transceiver • Extensive use of ferrites and magnetic/dielectric foam absorbers • RF synthesizers for Navy landing systems (150MHz-5GHz) • Clock and analog interface circuits (ADC/DAC) for high-speed ADCs • Small form factor consumer products: LTE USB dongles, LTE smart phone. • Antenna/RF design for Emergency Locator Beacons 121/400MHz (EPIRBs) Location: United States

Hello! I’m an Embedded Systems Engineer with a Bachelor’s degree in Electronics & Communications Engineering, specialized in Embedded Systems Development and IoT solutions. I help clients design and build reliable embedded systems from idea → prototype → final implementation, including microcontroller programming, IoT connectivity, sensor integration, and PCB design. ✅ What I can help you with: ✅ Embedded C / C++ Programming (clean, efficient, and scalable code) ✅ Microcontroller Programming (AVR, PIC, STM32, 8051) ✅ ESP32 / ESP8266 Projects (Wi-Fi, IoT dashboards, sensors, automation) ✅ Arduino Development (Uno, Nano, Mega) ✅ Microcontroller Interfacing using UART, I2C, SPI, ModBus, and CAN protocols ✅ PCB Design & Hardware Integration using: • Altium Designer • KiCad • Autodesk Eagle • EasyEDA ✅ Circuit Design, Simulation & Debugging using: • Proteus Professional • Autodesk Tinkercad • Fritzing ✅ Projects I’ve worked on: 🔹 Fertigation System for Greenhouses 🔹 Climate Monitoring and Control System for Greenhouses 🔹 Dual Axis Solar Tracking System 🔹 IoT-Based ECG Monitoring System 🔹 Smart Parking System 🔹 Smart Irrigation & Water Level Monitoring 🔹 Intelligent Lighting System 🔹 Automated Garage System 🔹 Solar Panel Cleaner 🔹 Access Control System (PIC18F4520) 🔹 RTC + Temperature/Humidity Monitoring 🔹 Embedded Converters (8051) 🔹 Stopwatch System (ATmega328P) ✅ Why clients choose me: ⭐ Proven experience in Embedded Systems and IoT development ⭐ Reliable delivery with professional documentation ⭐ Quick debugging, optimization, and clean code ⭐ Clear communication and client-focused support 📩 Feel free to message me anytime — I’d be happy to discuss your project and help you build your next Embedded & IoT solution.

I bring over 5 years of hands-on hardware and software design experience, taking projects from initial concept through to a production-ready design (PCB + firmware + connectivity). My PCB design expertise ranges from straightforward 4-layer boards to high-density 10-layer mixed-signal designs that demand tight impedance control, low-noise analog sections, and high-speed digital interfaces (DDR, Ethernet, USB 3.x, etc.). I’m fully proficient in Altium Designer and KiCAD, and I also have solid experience with OrCAD and Cadence Allegro when needed. PCB Design Highlights - Designed and released dozens of 4–10 layer PCBs, including high-speed mixed-signal boards with controlled-impedance traces, differential pairs, length-matched buses, and rigorous power integrity considerations. - Full ownership of the layout process: component placement for optimal signal integrity and manufacturability, stack-up definition, DRC/DFM validation, generation of Gerber, ODB++, and 3D STEP files. - Experienced with HDI features (blind/buried vias, micro-vias) when required for dense 8–10 layer boards. - Strict adherence to IPC standards and specialized requirements (MIL-PRF-31032, NASA-STD-8739.4, EMI/EMC best practices). Embedded Software Development - 5+ years writing production-grade embedded C for a wide range of microcontrollers (STM32, NXP i.MX RT/LPC, Microchip PIC32, etc.). - Linux bring-up and driver work on Raspberry Pi and custom ARM-based SOMs. Automated Test Fixtures & Test Software - Designed and deployed complete electrical/mechanical test fixtures that dramatically improved production throughput and first-pass yield. - Developed desktop test applications in C# (.NET WinForms/WPF) and LabVIEW for functional, in-circuit, and environmental testing. - Authored detailed test procedures meeting military and NASA standards (EMI, shock/vibe, thermal cycling, voltage transients, dielectric withstand, etc.). 3D Modeling & Mechanical Integration - Proficient in Fusion 360 and Solidworks for designing robust, serviceable test fixtures and enclosures. - Seamless electrical-mechanical integration: export of PCB 3D models, collision checks, cable routing, and generation of production-ready drawings. Hands-on Lab & Prototyping Skills - Expert-level soldering (0402, 0.4 mm pitch BGA, QFN) using microscope, hot-air, and reflow stations. - Rapid prototyping and debug with oscilloscopes, logic analyzers, spectrum analyzers, thermal cameras, and environmental chambers.

I am a very motivated and dedicated Electronics Engineer interested in programming microcontrollers and working on data acquisition (NI LabVIEW). I am an experienced LabVIEW Developer with over 6+ years of expertise in designing, developing, and deploying high-performance automation and control systems. Data Analysis/Report Generation: CSV, XML, TDMS, Excel, Word, PDF Non-related fun fact: I am also FIDE Master in chess and an online chess Coach with current rating 2365.

I’m Steven Calinski, an Embedded Systems & Firmware Engineer with a passion for solving problems using software or hardware designs. I have a strong background in electrical testing as well as embedded firmware development. I’ve worked on critical embedded projects for fire alarm systems, mobile computing hardware, RF designs, and IoT applications, handling everything from firmware development to EMI mitigation, component level debugging, production testing, schematic design, and board layouts. Languages: C, C++, C#, Python, VHDL RTOS: FreeRTOS, Zephyr RTOS MCU Experience: STM32: F7, H7, H5, H4, Atmel SAM E, Renesas RA, TI MSP430, Silicon Labs, ESP32, ESP32-S3 Firmware Debugging & Optimization: USB, I2C, UART, SPI, PWM, DMA, MQTT, Cellular Network, Current limiting, Power, Battery backup switching, driver creation. I have a background in electrical test engineering as well and am comfortable with hardware troubleshooting, rework, repair, etc. I have a basic rework setup in my home. I am very familiar using Saleae logic analyzer, and oscilloscope to address signal integrity issues. Automated Test Development: LabVIEW applications for engineering & regulatory testing, ESP32 IOT projects for test automation. PCB Schematic Capture & Layout: Cadence Allegro, KiCad, Eagle Board Bring-Up & Component-Level Debugging: Rapid prototyping and validation Microcontroller & RF Circuit Design: Sub-1GHz RF design, BLE integration Click "Invite to Job" or "Hire Me", and let me help you develop your next project.

I’m a mechanical and mechatronics engineer with 7+ years of professional experience in R&D, developing products from concept through prototyping till production-ready CAD and engineering drawings for real-world manufacturing. My primary CAD platform is SolidWorks, which I use in my day job for creating well-toleranced parts, assemblies, and detailed engineering drawings with proper GD&T and DFM considerations. I also work comfortably in Autodesk Inventor and Fusion 360, and regularly support clients operating in mixed CAD environments or with existing or legacy files. Clients typically bring me in when they need someone who can work from rough sketches, photos, reference parts, or incomplete requirements, make sound engineering decisions early, and deliver clear, buildable designs that manufacturers understand the first time. I’m a CSWP-certified SolidWorks professional, with additional advanced certifications in Sheet Metal, Surfacing, and Drawing Tools, applied on real production and prototyping projects. My experience spans medical devices, energy systems, automation equipment, and industrial prototyping, where accuracy and manufacturability matter. Recent work includes: Developing a proof-of-concept hinge assembly with integrated load sensing, designed with downstream safety and manufacturability in mind Contributing to the mechanical design and prototyping of a next-generation EEG medical device Optimizing the design of an IP65-rated sheet metal enclosure for an EV charger, with a focus on sealing, manufacturability, and compliance If you’re looking for a reliable mechanical engineer who thinks beyond geometry, including tolerances, assemblies, and manufacturing consequences, I’m happy to support your project on an ongoing or as-needed basis.

A skilled Systems Architect having 20 years of experience in the Design and Development of, Aviation, Aerospace, Embedded, Simulators and Instrumentation systems. Have led teams of 15+ developers working in various environments, using different toolsets for CAD, CAM, Analysis and Design of Electromechanical. I have delivered over 100 different products and projects to various clients. Have more than 5 years and 100,000+ lines of hands-on coding experience using, C/C++, IoT, Embedded Systems, G-Codes and Real Time Systems, Extensive experience with PLCs, DCS and HMI Programming & Design, Data Acquisitions Systems, CVI (C for Virtual Instrumentation), LabVIEW, NI-DAQ Systems

Embedded Systems | Firmware | PCB Design | Mechanical Design I help clients develop reliable prototypes and products in embedded systems, electronics, PCB design, and mechanical design. I have 3+ years of experience in the development of military/defense equipment, including UGVs, RCWs, and rocket subsystems, as well as prototyping medical, industrial, and musical equipment. Core skills: - Firmware development for MCUs (C/C++) on ARM platforms, STM32, ESP32, and Arduino; - Automation development on embedded systems and industrial equipment. - Industrial communications protocols knowledge (CANopen, Ethernet, EtherCAT, Serial and other) - PCB and circuit design; sensor integration; automation; - 3D/2D modeling and drafting; Fusion 360; AutoCAD; - MATLAB/Simulink; LabVIEW; C#; - 3D printing and prototyping. Available equipment: multiple ESP32, STM32, and Arduino platforms for prototyping, Ender 3 S1 Pro and Bambu Lab P1S 3D printers, and a Rigol DHO924S oscilloscope for testing and verification. I also have access to quick PCB and CNC production. Responsive, reliable, and focused on practical, on-time results.

As an innovative and passionate Robotics and Automation Engineer, my journey in the dynamic field of robotics has been marked by a relentless pursuit of excellence and a drive to stay at the forefront of technological advancements. With extensive experience spanning sensor fusion, behavior tree-based mission management, and robust safety system design, my expertise lies in turning complex robotic concepts into practical, real-world solutions. My time at Done Robotics and FALKU Robotics has honed my skills in software development, embedded systems, and sensor integration, allowing me to tackle challenges in SLAM, path planning, and perception with confidence. A committed problem solver, I excel in environments where creativity and technical prowess are key, bringing a rich palette of skills in Linux, C/C++, Python, Qt, ROS, and containerization tools like Docker and Snapcraft. I'm not just about the technicalities; I also bring strong soft skills, including leadership and an eye for detail, to every project. Whether it's designing user-friendly PCBs or programming complex algorithms, my goal is to contribute to projects that push the boundaries of what's possible in robotics and automation.

From simple to complex designs, I can provide a path that will take your concepts to designs and prototypes. Using a formal engineering process, I can ensure design specifications are met within budget and time constraints. My Hardware expertise includes: circuit design and analysis, schematic capture and BOM generation, and PCB layout and assembly. I have experience using several processor architectures such as AVR, PIC, and ARM. My software expertise includes: C/C++, C#, assembly, Java, HTML, CSS, SQL. I have experience building barebones firmware and RTOS firmware for several microcontroller applications. For more complex and versatile projects, I have experience designing high-speed FPGA systems using VHDL. I am able to simulate and verify designs before hardware is used. I primarily use Altera’s development tools for FPGA software.