STM32F4-based flight controller featuring a 6-axis IMU (accelerometer + gyroscope) for stable flight dynamics and a MAX7456EUI OSD generator for real-time video overlay of flight telemetry. #drone #flightController #STM32F405 #controller #OSD #video #referenceDesign #project #MPU6000 #template

4-layer marine GPS timing and communication device using nRF52840, u-blox ZED-F9P GNSS with external active antenna via u.FL, 915 MHz LoRa radio, Li-ion battery with USB-C charging, separate clean GNSS LDO and digital 3.3V rail, SPI memory LCD, RGB LEDs, buzzer, and 6-axis IMU. PCB target is a 70 mm circular layout with strict RF zoning, dedicated ground plane, 50 ohm RF traces, physical separation between GNSS and LoRa, and low-noise placement suitable for harsh marine environments.