Electronics & Electrical Project Blogs

How Work Goes

The engineering team designed an integrated telemetry PCB housing ambient temperature, barometric pressure, and relative humidity sensors. To achieve the 5-year battery life target, we optimized low-power sleep cycles on the microcontroller down to 2.4μA and implemented a custom sub-GHz protocol utilizing a high-efficiency helical antenna. Extensive environmental chamber testing from -40°C to +85°C was conducted to ensure reliability. Power traces were optimized, and external flash chips were selected with ultra-low leakage profiles during shutdown. Handoff-ready CAD schematics and manufacturing BOMs were generated and checked for compliance.

Technical Specifications & Technologies

• ARM Cortex-M0+
• Sub-GHz Helical Antenna
• SPI Flash Buffer
• 4-Layer Rigid PCB
• Altium Designer
• Environmental Chamber Testing

How Work Goes

We developed a closed-loop controller using an array of precision photodiodes to detect the solar zenith and azimuth. The system drives dual-axis stepper motors with custom microstepping controllers. Safety algorithms were integrated to automatically park the panels in high-wind conditions based on anemometer telemetry. Field testing showed a 38% increase in cumulative energy harvesting compared to static panels. Thermal layout for the stepper driver MOSFETs was optimized with thermal vias and custom heatsinks, ensuring continuous operation under direct sunlight.

Technical Specifications & Technologies

• Dual-Axis Stepper Driver
• Photodiode Sun-Tracking Array
• Closed-Loop PID Control
• Anemometer Safety Override
• High-Efficiency Buck Regulator

How Work Goes

We designed a robust DIN-rail mounted gateway housing an ARM Cortex-M4 microcontroller, RS-485 interfaces, and hardware-accelerated TLS encryption. The software protocol translator translates Modbus register maps to JSON payloads in real-time, buffering data locally in NOR flash during network disruptions. Electromagnetic compatibility (EMC) validation was conducted to meet heavy industrial standards. Surge protectors and optocouplers were placed on all industrial interfaces to prevent damage from ground loops and spikes.

Technical Specifications & Technologies

• ARM Cortex-M4
• RS-485 / Modbus RTU
• Hardware Cryptography
• Wi-Fi / Ethernet Bridging
• Yocto-compatible Firmware
• CE / FCC EMC Testing

How Work Goes

The project required routing high-speed DDR3 memory and dual 12-bit ADCs on a 10-layer PCB. We wrote highly optimized VHDL cores for real-time Fast Fourier Transforms (FFT) and digital filtering. Signal integrity was validated using GHz oscilloscopes and eye-diagram testing. The final system achieves a latency of less than 450 nanoseconds across 16 parallel audio channels. Power integrity simulations (PI) were performed to ensure stable FPGA core power supplies during dynamic switching cycles.

Technical Specifications & Technologies

• AMD Artix-7 FPGA
• DDR3 Memory Interface
• 10-Layer High-Speed Stackup
• Parallel VHDL FFT Cores
• HyperLynx Signal Integrity

How Work Goes

Patient safety and signal fidelity were paramount. We designed an isolated analog front-end utilizing high-CMRR instrumentation amplifiers and digital isolators. To eliminate 60Hz power line noise and electromyogram interference, we implemented real-time digital notch and bandpass filters. The design successfully achieved IEC 60601-1-2 medical safety compliance. Creepage and clearance rules were strictly followed on the PCB layout to satisfy patient insulation requirements.

Technical Specifications & Technologies

• Medical-grade Isolation
• High-CMRR Instrumentation Amp
• Bluetooth Low Energy (BLE)
• Real-time FIR/IIR Filters
• IEC 60601 Compliance

How Work Goes

We engineered a compact, low-profile OBD-II dongle featuring dual CAN transceivers and a low-power LTE-M modem. The device parses OBD-II PIDs and monitors raw CAN-bus traffic for diagnostic trouble codes (DTCs). Heat dissipation was optimized through advanced thermal vias and a 4-layer copper PCB stackup, allowing stable operation in tight engine bay spaces. Automotive transient suppression (TVS diodes) was placed on the power and data lines to handle load dump conditions.

Technical Specifications & Technologies

• Dual CAN Interfaces
• LTE-M Cellular Module
• Precision GPS Receiver
• ISO 7637-2 Power Protection
• Automotive Temperature Grade

How Work Goes

The system monitors cell voltage and temperature across 16 series Lithium Iron Phosphate cells. We implemented an active balancing circuit using flyback transformers to redistribute charge from high to low cells. Safety mechanisms include high-current MOSFET switch drives and hardware-based overvoltage and overtemperature trips. The system was validated under continuous 100A load testing. Isolation barrier layout was evaluated to manage noise from the high-power switching regulators.

Technical Specifications & Technologies

• 16S Cell Monitoring
• Active Transformer Balancing
• State of Charge (SoC) Coulomb Counter
• Dual Redundant Isolation
• Continuous 100A Current Handling

How Work Goes

The hardware design combined a low-power LoRa transceiver with soil moisture and ambient light sensors. We optimized the RF front-end impedance matching to achieve an insertion loss of under 0.2dB. Outdoor range verification demonstrated robust communication through dense foliage at distances up to 12km and clear line-of-sight up to 18km. Enclosures were carefully designed with Gore-tex vent patches to avoid internal pressure build-up and condensation.

Technical Specifications & Technologies

• SX1276 LoRa Transceiver
• 915MHz RF Front-End
• Capacitive Soil Sensor
• IP67 Waterproof Enclosure
• Impedance Matching Smith Chart

How Work Goes

The controller utilizes a high-power inverter bridge composed of ultra-low RDS(on) MOSFETs driven by a dedicated gate driver. We developed the FOC algorithm on a 32-bit MCU, sampling motor currents via inline shunt resistors at 20kHz. Dynamic dynamometer testing was performed to optimize efficiency curves, achieving 96.4% drive efficiency at peak loads. Current sensing traces were kept extremely short and symmetric to prevent magnetic interference from the high current paths.

Technical Specifications & Technologies

• Field-Oriented Control (FOC)
• 48V 3-Phase Inverter Bridge
• 32-bit Cortex-M4 Control Loop
• Inline Current Shunt Sensing
• High thermal conductivity IMS board

How Work Goes

This project involved routing a complex system-on-chip with LPDDR4 memory running at 4000MT/s. We designed the power delivery network (PDN) to handle transient current spikes during AI model inference. The gateway runs a custom Yocto Linux image and executes neural networks locally, processing high-resolution camera feeds to detect assembly line anomalies. Length and impedance routing constraints were strictly enforced on the 8-layer HDI PCB, utilizing laser-drilled microvias.

Technical Specifications & Technologies

• NXP i.MX8M Plus
• LPDDR4 High-Speed Routing
• Integrated Neural Processor Unit
• 8-Layer HDI PCB
• Yocto Project Custom Linux

How Work Goes

The nodes utilize BLE and sub-GHz mesh protocols to pass telemetry back to a central gateway. The enclosures were engineered with breathable, water-resistant membranes to protect the electronics while allowing accurate relative humidity measurements. The system is designed to operate continuously for 10 years without manual maintenance. Low dropout regulators (LDOs) with ultra-low quiescent currents were selected to maximize solar battery standby efficiency.

Technical Specifications & Technologies

• Sub-GHz Mesh Radio
• Solar Battery Charger Management
• Capacitive Soil Probe
• Ultra-Low Quiescent LDOs
• Weatherproof enclosure IP65

How Work Goes

The controller leverages a dual-core ARM + FPGA architecture to compute kinematics and trajectory profiles. The VHDL FPGA fabric handles encoder feedback parsing and generates synchronized PWM signals. EtherCAT communications were tested using network analyzers to ensure jitter was maintained below 1.2 microseconds. Opto-isolation was used across all digital inputs and output channels to eliminate high voltage transient damage from servo motors.

Technical Specifications & Technologies

• Dual-core ARM Cortex-A9
• Intel Cyclone FPGA fabric
• EtherCAT Real-time Ethernet
• Encoder feedback Quadrature core
• High-Speed Digital Isolation

How Work Goes

RF layout techniques were critical, including coplanar waveguide routing and Rogers PCB substrate materials. We designed a multi-stage GaN transistor amplifier circuit and simulated impedance matchings. Testing was performed using vector network analyzers (VNA) and spectrum analyzers to guarantee FCC compliance. Decoupling capacitors and shielding cans were designed to suppress radiated emission and prevent crosstalk into sensitive IF stages.

Technical Specifications & Technologies

• Rogers RO4350B substrate
• GaN Transistor RF Front-End
• 2.4GHz Bandpass filtering
• Vector Network Analyzer (VNA)
• Shielded Isolation Cans

How Work Goes

Sensors were housed in a heated intake manifold to prevent condensation from skewing measurements. The board features a cellular module and GPS. Calibration algorithms utilize machine learning models to adjust sensor drift based on historical and local meteorological data. Field deployment across 50 municipal sites validated stability over 12 months. Low-noise analog signals were routed in shielded interior layers of a 6-layer PCB to maximize SNR.

Technical Specifications & Technologies

• Electrochemical Gas Sensing
• PM2.5 Laser Particle Sensor
• Active Heating Manifold
• LTE Cellular Uplink
• AI-driven Sensor Calibration

How Work Goes

The hardware uses high-precision current transformers and isolated voltage dividers. 24-bit delta-sigma ADCs feed digitized data to a DSP running DFT algorithms. The system communicates via Modbus TCP and DNP3 protocols. The device was certified to meet IEEE 1159 standards for power quality monitoring. The layout required high isolation voltage separation zones between the analog input terminals and digital interface sections.

Technical Specifications & Technologies

• 24-bit Delta-Sigma ADC
• Three-Phase Current Transformers
• High-Speed DSP (150MHz)
• Modbus TCP / DNP3 Protocol
• IEEE 1159 Compliance Certification

How Work Goes

We designed a custom carrier board for a NVIDIA Jetson Orin Nano module, incorporating isolated CAN-bus, RS-232, and high-speed USB 3.0 interfaces. Sensor fusion algorithms combine wheel odometry with IMU data and LiDAR scans to localize the robot within ±5mm. Shock and vibration testing were performed to meet warehouse operation profiles. USB 3.0 differential signal lines were designed with strict differential impedance matching of 90 ohms.

Technical Specifications & Technologies

• NVIDIA Jetson Orin Nano
• Custom Carrier Board Design
• LiDAR / IMU Sensor Fusion
• Isolated CAN-Bus Transceiver
• USB 3.0 differential impedance routing

How Work Goes

The board features two SFP+ cages and multi-gigabit transceivers routed with strict length matching. In the FPGA, we implemented high-speed packet parsers and filtering tables that match packets based on custom rulesets in parallel at line rate. System verification was conducted using specialized traffic generators. The PCB design features a high-density 8-layer board utilizing low-loss Megtron 6 dielectrics to maintain signal integrity at 10Gbps.

Technical Specifications & Technologies

• Xilinx Kintex-7 FPGA
• Dual SFP+ 10G Transceivers
• Megtron 6 PCB Substrate
• Line-Rate Verilog Packet Filter
• High-Speed Length Matching

How Work Goes

We combined a high-efficiency switching pre-regulator with a precision linear post-regulator stage to achieve both efficiency and clean output. A 16-bit DAC controls the voltage and current limit loops, while a 24-bit ADC monitors actual output parameters. Safety features include overvoltage, overcurrent, and reverse-current protection. Precise analog ground routing was implemented to isolate DAC/ADC noise from switching regulator fields.

Technical Specifications & Technologies

• 16-bit DAC & 24-bit Delta-sigma ADC
• Switching Buck Pre-Regulator
• Precision Linear Post-Regulator
• Isolated Analog Ground Plane
• Overvoltage & Overcurrent Protection

How Work Goes

This ultra-compact circular board was routed on a 4-layer flexible polyimide PCB. We integrated a bio-sensing analog front-end and a Cortex-M4 MCU. We compiled a custom neural network model using TensorFlow Lite for Microcontrollers to run anomaly classification on-device, saving significant wireless power by only transmitting abnormal events. The flexible substrate required special trace geometry design to survive repetitive bending stress cycles.

Technical Specifications & Technologies

• 4-Layer Flexible Polyimide PCB
• TensorFlow Lite for Microcontrollers
• Bio-Sensing Analog Front End
• Cortex-M4 Ultra Low Power
• Active Bending Strain Relieving

How Work Goes

This state-of-the-art B2B project integrates a dedicated V2X chip running DSRC and C-V2X protocols at 5.9GHz. We implemented a hardware secure element to perform cryptographic message signing (ECDSA) in under 2ms to meet high-speed highway traffic requirements. The module was tested in real automotive testbeds and achieved AEC-Q100 certification. Antenna path routing was performed on Rogers RO4003C material to ensure minimum signal attenuation at 5.9GHz.

Technical Specifications & Technologies

• 5.9GHz C-V2X / DSRC RF Chip
• Hardware Security Module (HSM)
• Rogers RO4003C RF Substrate
• ECDSA cryptographic engine
• AEC-Q100 Automotive Certification