Projects & Case Studies

Standard NFC stickers lack durability, branding flexibility, and RF performance on metal surfaces. Businesses need a robust, customizable NFC solution for access control, authentication, and smart interactions.

Designed a precision-tuned 13.56 MHz planar PCB antenna tag with custom silkscreen branding, dual-channel QR redundancy, and universal tap compatibility across iOS and Android — no app required.

Impedance-matched 7 pF high-Q matching network, S11 return loss verification via Vector Network Analyzer, multi-layer PCB with tuned copper trace geometry, passive RF energy harvesting output at 2.9V DC.

Industrial facilities needed a reliable bridge between legacy RS-485 Modbus RTU field devices and modern IP-based monitoring systems, operating in electrically noisy environments with voltage transients.

Developed a galvanically isolated RS-485/Modbus RTU to Modbus TCP gateway with integrated TVS protection, optocoupler isolation, and fail-safe watchdog firmware for unattended 24/7 operation.

Custom 4-layer PCB with uninterrupted ground planes, 2.5 kV galvanic isolation on all communication interfaces, DMA-driven UART for zero-copy Modbus frame processing, hardware watchdog with automatic recovery.

Agricultural operations required real-time soil moisture, temperature, and humidity monitoring across distributed field locations with no reliable power or connectivity infrastructure.

Built solar-powered wireless sensor nodes with low-power ESP32 microcontrollers, LoRa communication for long-range field coverage, and MQTT telemetry to a cloud dashboard for remote monitoring.

Ultra-low-power sleep state profiling achieving multi-week battery life with solar recharge, encrypted MQTT telemetry, custom PCB with conformal coating for outdoor deployment, over-the-air firmware update capability.