FPV Insights

A technical history of DJI video transmission chips: from off-the-shelf Leadcore LC1860 SoC in early OcuSync, through customized P1 (Falcon) and S1 (Sparrow) ASICs, to the latest S2 chip supporting wider channel bandwidths. Covers DJI’s three-phase strategy from chip selection to specification definition, and the architectural differences between each generation.

A technical guide to wireless ad hoc network transmission control: silent mode (controlled node transmit state switching) and TPC (Transmit Power Control) for dynamic link-quality-based power adaptation. Covers architecture, control vs. business signal separation, and engineering applications for reducing RF exposure and optimizing spectrum efficiency.

A technical deep dive into IMU error sources (gyroscope bias, scale factor, cross-axis errors, temperature drift) and calibration methods (static multi-position, dynamic turntable, temperature compensation). Covers Allan variance analysis, MEMS vs fiber optic IMU trade-offs, and profiles China’s top-tier IMU manufacturers including CoreTronics and CASIC research institutes.

An open-source project that connects ESP32 microcontrollers to LLMs, creating a minimal embodied AI system with vision, touch, audio, and OLED display. Covers hardware architecture, sensor integration, bridge service design, latency benchmarks across 660 experiments, and practical guidance for makers exploring embodied intelligence on low-cost hardware.

A comprehensive guide to drone IMUs (Inertial Measurement Units). Covers 6-axis vs 9-axis configurations, gyroscope/accelerometer/magnetometer working principles, Kalman filtering and complementary filtering for sensor fusion, bias drift compensation, and key applications including stable flight, GPS-denied navigation, gimbal stabilization, and precision industrial operations.

A technical deep dive into the SBUS (S.Bus) digital RC protocol. Covers UART configuration (100000 8E2), 25-byte frame structure, 11-bit channel packing for 16 proportional channels, status flags, signal inversion circuits, and common implementation pitfalls in drone flight control systems.

A comprehensive technical guide to the CRSF (Crossfire Serial Protocol) used in drone flight control systems. Covers UART wiring, frame structure, type definitions, RC channel packing, extended frames for Lua parameter interaction, failsafe handling, and practical implementation details for ExpressLRS and TBS Crossfire.

A field engineer’s guide to IMU selection for industrial drone flight controllers. Learn why noise density, bias stability, temperature drift, range, bandwidth, and shock survival matter more than the specs vendors highlight — with 3 real-world crash case studies and a printable selection checklist.

A reader built an INA228 + REF200 + PT1000 temperature measurement circuit claiming 0.005°C accuracy. We analyze why resolution ≠ accuracy and break down 6 critical error sources in this deep-dive metrology analysis.

reBot-DevArm by Seeed Projects puts hardware drawings, BOM, Python SDK, ROS2 integration, and LeRobot embodied AI tutorials on GitHub with OSHWA certification. 3.7k stars and growing.