Hire the Best Analog Electronics Specialists
in Lithuania

Hello! 👋 I’m an Electronics Engineer with 10+ years of experience in embedded systems, PCB design, and hardware development — from concept to working prototype and production-ready solutions. My expertise includes: • Embedded hardware & firmware development • Low-power BLE devices and wearable electronics • PCB design for microcontrollers, sensors, RF, and high-speed interfaces • RF and antenna design • Power management and battery-powered systems • Prototype development and hardware debugging • Compact enclosure and product integration Tools I work with: 🔹 Altium Designer 🔹 CST / Ansys / Comsol 🔹 Fusion 360 / Inventor 🔹 Circuit simulation and signal analysis tools I also have hands-on experience with rapid prototyping technologies including 3D printing, CNC milling, and small-scale production preparation. I focus on building reliable, efficient, and well-engineered products with clear communication and attention to detail. Let’s build something great together. 🚀 〰〰〰〰〰〰〰〰〰 Essential Services 〰〰〰〰〰〰〰〰〰 ✔ PCB layout. ✔ Hardware Design. ✔ Electrical and Electronic Engineering. ✔ Robotics. ✔ Prototypes. ✔ Conceptualizing electronic projects. ✔ Internet of Things projects. ✔ Embedded Systems. ✔ Designing compact enclosures for devices. 〰〰〰〰〰〰〰〰〰 Applications 〰〰〰〰〰〰〰〰〰 ✔ Boost converter/buck converter. ✔ DC-DC Converters / AC-DC Inverters ✔ High-precision measurement system with various sensors. ✔ RF design. ✔ PCB antennas. ✔ RFID design. ✔ Microcontrollers. ✔ Microprocessors. ✔ QI wireless chargers. ✔ MEMS (accelerometer, gyroscope, etc.) ✔ WIFI / GPS / BLUETOOTH / ZIGBEE systems. ✔ Communication USB2.0 / USB3.0 / USB3.1 / USB3.2 ✔ I2C / UART / I-Wire communication. ✔ Ethernet / RS232 / RS485 communication. ✔ Switching power supplies / linear power supplies. Upon completion of the work, I will provide you with production documentation according to your requirements or those of the PCB manufacturer. I can also supervise the production of printed circuit boards and test upon its completion and afterwards prepare report and renderings for visualization. 💻 Best regards.🤝

My job is to design functional and tested circuits and PCBs for your application or consult you, so you can do that your self. Just give me requirements for your circuit: the price for bill of materials, deadline and a list of required features. After a prototype of the device is designed, which I almost always advise, I will order few sample PCBs for testing. After testing and debugging is completed, I will ship them to you, so you can verify my testing results. This costs extra for you, but you are buying 100% working circuit design which needs no testing. Just take it and use it in your project. If you want to know how a circuit works I can develop complete math model of the circuit. This approach is way more accurate than SPICE simulation and allows you to understand how the circuit operates. I have completed at least one project having fallowing sub circuits: Analog: Low noise, low speed front-ends (from Hz to 100KHz): Photodiode, strain gauge, pressure sensitive resistors, magnetic angle sensors, tensile, thermocouples and other. High order active filters Voltage measurement (uV to kV) Current measurement (pA to tens of A) Resistance measurements (mOhm to Mohm) Frequency measurement (below GHz) Current output Oscillators (Bubba, Pierce, Hartley, phase shift, relaxation, crystal, RC) Integrated RF transmitters/receivers Digital: PCIe USB HDMI I2S SPI High speed parallel interfaces Logic circuits (TTL, CMOS) SOCs Power: DC/DC converters: Buck, Boost, SEPIC, full bridge, Cuk, Linear AC/DC converters (up to 1.8kW) Brushless and brushed motor drivers TEC drivers CAD packages: DipTrace KiCad Altium I have fallowing equipment: 1x Osciloscope RTB2004 4 channel 10 bit 300MHz with logic analyzer having 16 differential channels up to 600Mbps. 1x Oscilloscope HMO1002 2 channel 8 bit 50MHz. 1x Multimeter HMC8012 5,75digit 1x Electronic load IT8616 1.8kVA 420VAC 20AC (60A peak) or 600VDC 20ADC with AC signal analysis 1x Electronic load IT8512C 120VDC 60ADC 1x Signal generator Rohde and Schwarz AFG 20MHz 1x TP3020 30V 20A linear power supply 1x HY5003-2 dual channel 50V 3A linear power supply 2x PeakTech 6080A 15V 3A power supply 1x VP-2000VA - 2kVA 230VAC to 120VAC converter. 1x DER-EE DE-5000 RLC meter I also have programmer for: Texas Instruments CC series, Texas Instruments MSP430 programmer, Microchip ICD3/PicKit2/AVR ISP USBasp, Segger ARM programmer, SiliconLabs 8051 core programmer

"Sergey is knowledgeable of electronics principles and able to complete electronics design." "Excellent to work with." "Outstanding work. You can trust this guy. Will hire again." "Sergey has a lot of knowledge with PCB designs and is a valuable asset to any team." I provide high-quality full cycle Electrical Engineering services from Idea to Mass Production: Hardware, Firmware, Product Design, Prototyping, Manufacturing. HARDWARE: - PCB design: Altium, Eagle. Experience in Digital, Analog, Power electronics, Digital Signal Processing. - 6-12 layers PCB layout, HDI routing, dense routing, thermal management. - Gigabit Ethernet and USB-C. High-speed routing with length matching; impedance calculations. - Component selection, BOM optimisation, preparation of manufacturing documentation. - High current PCB routing up to 200A - EMC reduction, EMC problem fixing FIRMWARE: - MCU firmware in C for ARM, TI, NXP, Atmel, PIC, Arduino; Python; - Bluetooth, Bluetooth Low Energy (BLE), and wireless modules programming. PROTOTYPING: - PCB Prototype manufacturing, debugging, and validation; - Consultation on any aspect of design and manufacturing. MANUFACTURING - BOM optimization to save cost / get better components availability - Creating test instructions, work instructions, test jigs - Organization of contract manufacturing in China I HAVE EXPERIENCE IN: - IoT projects, sensors, wearable electronics, Smart-home systems; - Automotive and Climate control equipment. I developed hardware equipment for autonomous driving systems. - High current high power electronics (BLDC drivers, frequency converters, battery chargers, battery balancers, inverters, power banks, home power storage systems) - High voltage power supplies up to 20 kV - Energy harvesting (solar, piezo, thermal) - Digital signal processing, audio signal processing, Sigma Studio - Solar trackers - Video recording systems for commercial delivery fleet - Wearable projects with tiny flex rigid pcbs AUDIO: - Analog signal processing, High End audio amplifiers - Room acoustic treatment consultations - ANC earbuds and headphones development INDUSTRIAL: - High-reliability systems for critical applications (Robotics, Oil and Gas, Automation); - Micro-controller control systems; - Power Supplies (AC/DC/AC) - AC, DC, BLDC, Step motors, robotics MEDICAL: - ECG, EMG, PPG, SpO2 sensors - Blood pressure monitoring - Respiration rate monitoring - Limbs position monitoring WIRELESS: - GPS, GNSS, telematics - Bluetooth and BLE-enabled devices; - 2.4Ghz radio transmitters (nRF24 family); - NFC tags: hacking, cloning; - Wireless charging Tags: Electrical Engineer, Electrical Engineering, Electronics, Hardware, Firmware, PCB layout, Board layout, Schematics, Altium, IoT, Internet of Things, Power Electronis, Bluetooth, BLE, TI, Texas Instruments, C, C++, MCU, Microcontroller, prototype, validation, BMS, Fusion360, USB-C, Jetson Orin, Jetson Xavier, STM32, GNSS, GPS