F405 Mini 20×20 (Pick ESC or Flight Controller or Stack)
Professional Performance in Miniature Form
The SpeedyBee F405 Mini 20×20 Stack packs full-sized features into a tiny package, combining an STM32F405 flight controller with 35A BLHeli_S ESCs for micro and lightweight FPV builds. This complete system delivers Bluetooth configuration, DJI Air Unit compatibility, and 8MB Blackbox logging in a compact 20x20mm footprint, making it ideal for toothpick, cinewhoop, and micro long-range builds.
Flight Controller Highlights
Core Components
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MCU: STM32F405 (Betaflight/INAV supported)
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Gyro: ICM-42688P for precise flight control
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OSD: AT7456E chip for clear on-screen display
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Barometer: Built-in for altitude hold functions
Smart Connectivity
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Bluetooth Configuration: Built-in BLE (UART4 @115200)
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DJI Air Unit Support: Direct solder pads for O3/Vista/Air Unit
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8MB Onboard Blackbox: No SD card required
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USB Type-C: Fast firmware updates
Power Management
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Input Voltage: 3-6S LiPo
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5V Output: 4 groups (2A total)
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9V Output: 1 group (3A max)
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3.3V/4.5V Output: For receivers and GPS
ESC Specifications
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BLHeli_S Firmware: J-H-40
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Continuous Current: 35A x4 (45A burst)
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Protocols: DSHOT300/600
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Current Sensor: Scale=250, Offset=-500
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Compact Design: 35×35×5.5mm (7.2g)
Key Features
Flight Performance
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ICM-42688P Gyro: Clean signals for smooth handling
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Betaflight Camera Control: Dedicated CC pad
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6 UART Ports: Extensive peripheral support
Build Integration
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20×20mm Standard Mounting: Fits micro builds
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Dual Screw Compatibility: M2/M3 options
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Optimized Stack Height: Just 14.2mm total
