Product overview
The Happymodel Crazybee F3 Pro is a flight controller board for brushless tiny whoop builds, including 2S configurations. Its 28.5 × 28.5MM board weighs 4.2g and combines an STM32F303CCT6 processor, an SPI-connected MPU-6000 sensor, four BLHeli_S ESCs, Betaflight OSD and a receiver option. This integrated architecture brings flight control, motor control and monitoring into one board. It is an electronic integration component; the FPV configuration requires an added video transmitter and camera.
Power input is 1-2S at DC 3.5-8.7V, with LiPo and LiPo HV support specified for the ESCs. Each ESC is rated at 5A continuous, with a 6A peak limited to three seconds. A filtered 5V 1A buck/boost supply, voltage detection and a current meter complete the onboard power functions. Receiver choices cover SPI Flysky, SPI Frsky NON-EU and serial DSM2/DSMX. Each receiver option has a stated 300m range under the specific condition of no ground interference, with transmitter and receiver 1 m above ground.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | Happymodel Crazybee F3 Pro Flight Controller 5A 1-2S Compatible Flysky/Frsky/DSMX Receiver |
| Product purpose and additional FPV equipment | Flight controller for a 2S brushless tiny whoop; VTX and camera require addition.For 2S brushless tiny whoop integration. |
| Controller designation and firmware target | CRAZYBEEF3 PRO FS; firmware target: CrazybeeF3FSFS configuration. |
| Flight controller MCU | STM32F303CCT6 (72MHZ, 256K FLASH) |
| Sensor | MPU-6000, SPI connection |
| Board size | 28.5 × 28.5MM |
| Weight | 4.2g |
| Controller power supply | 1-2S battery input (DC 3.5-8.7V)Battery input. |
| Integrated motor control | Built-in BLHeli_S 4in1 ESC, 5A each, Dshot600 ready5A per ESC. |
| On-screen display | Built-in Betaflight OSD with SPI control |
| Current meter | Built-in current meter; maximum 28A; current meter scale set to 1175 |
| Regulated power output | Built-in 5V 1A buck/boost with LC filter |
| Voltage detection | Built-in voltage detection |
| ESC pass-through | BLHELI_S pass-through ready |
| Heading LED support | Heading LED ready |
| Receiver interfaces | SPI Frsky, SPI Flysky or serial DSM2/DSMXReceiver configuration options. |
| ESC MCU | MCU upgraded to EFM8BB21Onboard 4in1 ESC. |
| ESC power supply | 1-2S LiPo/LiPo HV (3.5v/8.7v)Onboard 4in1 ESC. |
| ESC current rating | 5A continuous; peak 6A (3 seconds)Peak current duration: 3 seconds. |
| ESC programming | Programmable with BLHeliSuiteOnboard 4in1 ESC. |
| ESC firmware and default protocol | Factory firmware: S_H_50_REV16_7.Hex; default protocol: DSHOT600Factory configuration of onboard 4in1 ESC. |
| Flysky receiver interface, protocols and channels | SPI bus; switchable AFHDS and AFHDS-2A; 8ch (AFHDS) or 14ch (AFHDS-2A)Built-in Flysky receiver option; channel count depends on selected protocol. |
| Flysky receiver range and failsafe | 300m; failsafe supportBuilt-in Flysky receiver option; no ground interference, with transmitter and receiver 1 m from the ground. |
| Frsky receiver interface, modes, channels and failsafe | SPI bus; switchable Frsky D8/D16; Non EU transmitter compatibility in both modes; 8ch or 16ch; failsafe supportBuilt-in Frsky NON-EU receiver option; compatible with Non EU transmitters in D8 and D16 modes. |
| Frsky receiver range | 300mBuilt-in Frsky NON-EU receiver option; no ground interference, with transmitter and receiver 1 m from the ground. |
| DSM2/DSMX receiver interface, protocols and channels | Serial bus; DSM2/DSMX compatible; 6-9 channels, depending on the radioBuilt-in DSM2/DSMX receiver option; channel count depends on the radio. |
| DSM2/DSMX receiver range | 300mBuilt-in DSM2/DSMX receiver option; no ground interference, with transmitter and receiver 1 m from the ground. |
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