Reasunta Technology GmbH - EATON (On-Site 11.2024 - Present)
- Schematic, PCB and design documentation package for an autonomous fire alarm module measuring the temperature in mines and transmitting/receiving data via LoRAWAN at frequencies of 433 MHz and 868 MHz. The main feature is autonomous operation in the range from 2 to 3 years. The device is implemented using components with low leakage currents, and I also compiled an aglorhythm for the device's operation, ensuring such a long period of autonomous operation from an AA element.
- Schematic, printed circuit board and design documentation package for a LoRaWAN gateway operating in underground mines and transmitting/receiving data via LoRAWAN at frequencies of 433 MHz and 868 MHz. The main feature is the implementation of power supply circuit protection with galvanic isolation and impedance matching for the radio frequency path with a high level of interference protection.
During remote freelance development hardware design of the infants vision monitoring was started. Technical specifications, main components and hardware structure of the Rockchip SoC based device are designed. Also the MCU, PMIC, LPDDR4 and USB3.0 PCB design parts were finished, but whole PCB was not. ESP32 test board is made. Project stopped due to the lack of investment
- Industrial controller PCB with features:
- DOs with 40V and 10A max load and status indication;
- RFID with temperature control and heating
- LoRa
- Wi-Fi
- 2G/3G
- SPI implementation with bus length up to 10m
- EMC/EMI protection
- Industrial ADC PCB for weight measure:
- IEC61000-4-2 level 4 protection
- SPI implementation with bus length up to 10m
- specialized ADC
- 2 layers PCB
- 0.05% accuracy
My current place of work. The smart automotive power boards with the following features was developed:
- SEPIC, BOOST and BUCK dc-dc converters;
- Power-path and battery management;
- Analog measurement circuits;
- Self-control system with failures control and emergency turn-off;
- Low-noise and stable outputs;
- Semi-automatic electronic door lock circuit and PCB based on Cortex M4 core with bluetooth, USB, UART, SPI interfaces on board and ultralow power consumption. Device is fully tested (key features and ESD) and put into mass production;
- Full-automatic (Aka smar-automatic) door lock circuit, harnesses and PCB design based on RISC-V core IC, fingerprint sensor circuit, battery management, UART, I2C, SPI, USB3.0, BLE 5.1 interfaces and power-path management. Device is fully tested, but it is not for mass production;
- Door lock inside panel circuit and PCB design. It is a small and low-powered device which is a smart latch of the lock with LCD, buttons, touchpad and UART, BLE 5.0 interfaces.
The key skills and knowledges i got in this job is:
- 2.4GHz antenna design;
- USB 3.0 routing;
- power-path management;
- Market of Chinese microcontrollers studied (There are really a lot of interesting things);
- Gained communication skills with Chinese suppliers and engineers
- I developed a line of industrial programmable logic controllers based on STM32 (similar to SIEMENS), a five-inch touch control panel, a connection diagram for a special 1800W microwave device, as well as a wireless module for transmitting information via 2G and Wi-Fi.
- In addition to electronics, cables and instrument cases were developed, as well as the layout of the device parts.
- After developing and ordering parts, I accompanied the production of products.
In parallel with my master's program, I worked for 2 years at the Institute of Physics of Metals as a junior researcher. In the course of work, I developed a universal amplifying path for the needs of magnetic eddy current testing. I learned how to match eddy current sensors, piezo sensors and hall sensors with the amplifier. As a result of the work, a master's thesis and a scientific article were written.
- · Programmable industrial logic controllers design;
· Smart door lock electronics design;
· Touchscreen industrial operator panel design;
· It was necessary to design a microwave device for the disinfection of medical equipment (1800W);
· BLE modules and 2.4GHz antennas design;
· Analog electronics, analog amplifiers for acoustic, eddy current and magnetic signals, PT1000/PT100;
· Automotive uo to 200W power source design;
· ARM microcontroller based devices (STM32, FREQCHIP, GOODIX, Allwinner, Rockchip, etc.);
· SPI, IIC, U(S)ART, RS-232, RS-485, USB 2.0, USB 3.0, etc.;
· Highspeed DDR2, LPDDR4, MIPI-CSI, 1G-Ethernet, LVDS, SDIO circuits and PCB design;
· DC/DC converters, AC/DC converters (flyback, buck, boost, sepic etc.);
· Battery management;
· Antennas design (BLE, FM, RFID, LoRa);
· Stepper motor cirquits;
· Design of transformers (including planar (or PCB) transformers);
· PCB design of varying complexity (from 2 to 8 layers, from 1 to 4 isolated independent channels on one compact board);
· Harnesses design and drawing;
· Instrument cases design. Includes cases 3D modelling and 2D drawing, drawing stickers and other graphic materials for device cases
3D DESIGN USING DESIGN SPARK
SPECIALISED PLC WITH RS-485, ANALOG AND DIGITAL ISOLATED PORTS
BLE 4.2 SPECIALISED FREQCHIP BASED MODULE
Design and implementation of a PCB for a dhikr counter (prayer patterns in Islamic religious practice)
5W ISOLATED POWER MODULE WITH 4 ISOLATED OUTPUTS AND PLANAR FLYBACK COIL
ISO 7637-2, ISO10605 ADN IEC 61000-4-4 AUTOMOTIVE POWER PCB WITH SELF CONTROL, HEAT AND POWER PROTECTION MODULES
ISO 7637-2, ISO10605 ADN IEC 61000-4-4 AUTOMOTIVE POWER PCB WITH SELF-REGULATION, 20W BUCK AND 100W SEPIC MODULES
ISO 7637-2, ISO10605 ADN IEC 61000-4-4 AUTOMOTIVE POWER PCB WITH SSTM32 BUCK AND RJ45 to GX16-8 PCB
LoRaWAN 868 and 433 Gateway and Standalone sensor PCBs
ESP32 devboard PCB
Industrial IoT PLC and Industrial ADC PCBs
DDR2 and Ethernet 1G routing Examples
CAN-LIN module board
The music industry has spawned an interest in hardware development, as The first device made was a homemade guitar preamp.
Personal qualities include: soft skills, good communication skills, ability to solve tasks, the ability to bring things to an end, focus on tasks, the ability to delegate development, the ability to find information, learnability, the desire to make the lives of people around me better
Software I use: P-CAD, Altium Designer, EasyEDA, AutoCAD, Photoshop, Zebra, CorelDraw, NI Multisim, LT Spice, Word, Excel, PowerPoint, Design Spark, STM32Cube
