Matek F405-OSD Flight Controller, STM32F405, Betaflight

Matek has built a strong reputation among FPV builders for flight controllers that pack genuinely useful features into a standard 36x36mm form factor without unnecessary bloat, and the F405-OSD continues that approach. At its core sits a 168MHz STM32F405RGT6 32-bit processor paired with an ICM-20602 6-axis IMU, a combination that supports high-performance 32K gyro sampling and 16K PID loop rates - headroom that matters for pilots running aggressive tuning or fast-response freestyle and racing setups rather than basic cruising.

Built-in OSD uses the AT7456E chip running through Betaflight's OSD system, displaying flight data (battery voltage, RSSI, flight mode, and more) directly in the FPV video feed without needing a separate OSD module - one less component to wire in and one less potential point of failure in the video chain. Blackbox logging is supported through a microSD card slot (SD/SDHC, up to 4GB, card not included), letting detailed flight data be recorded for post-flight tuning analysis.

Connectivity is genuinely comprehensive: a VCP plus five hardware UARTs (UART1-UART5) cover receiver, VTX, GPS, and telemetry connections simultaneously, with UART2-RX specifically including a built-in inverter for SBUS receivers, removing the need for an external inverter module some other boards require. Six PWM/DShot motor outputs are provided without pin conflicts, plus a dedicated pad group for connecting a 4-in-1 ESC's signal and ground lines directly.

The board ships with four M3 anti-vibration standoffs included, a small but genuinely useful inclusion that saves sourcing separate soft-mounting hardware. Builders assembling a Betaflight-based FPV quad who want a well-specified, full-featured F405 flight controller with onboard OSD and blackbox already covered will find the F405-OSD a well-proven choice from an established, respected brand in the FPV flight controller space.