HelioRC SPRING Mini 20x20 IMU-F Flight Controller

by HelioRC

Get the unparalleled high performance of the Helio Spring Flight Controller in a compact, mini 20x20 package today! Bring the smoothest flight experience on the market to your racer or freestyle quad. 

Truly Freeing with HelioRC

  • This flight controller runs multiple multiple open source flight controller firmwares including the latest Butterflight, Betaflight, iNav, and others.

Helio's IMU-F

  • The hardware contains both an f3 and an f4. The gyro is the ICM 20601.
  • The IMU-F system is an advanced inline discretely filtered gyro that is transparent to the flight controller.
  • More processing power is available for flight controller logic and future feature updates without causing slowdown or other issues during flight.

Natively Fast

  • True 32khz processing without overclocking.
  • More than capable of 32khz pid-loop speeds even on an F4.


  • Mounting: 20x20MM
  • Processors: F4 & F3, STM32F405 & STM32F301
  • IMU: ICM 20601
  • OSD: Full Betaflight OSD support
  • Motor Outputs: Full DSHOT and MULTISHOT support
  • Receiver Support: PPM, S.Bus (inverter built-in), DSM, HoTT, SRXL, CSRF, FPort ready. 5V or 3.3V supply for receiver
  • Telemetry Support: FrSKY Smart Port, FrSKY Sensor Hub, HoTT Telemetry, SRXL, CSRF, FPort ready. Built-in inverter for FrSKY telemetry
  • Serial Ports: 5 full serial ports (UARTs). UART1 and UART2 have inverters for S.Bus and SmartPort telemetry
  • Buzzer Port: Dedicated port for 5V (100mA max) buzzers
  • Analog Inputs: Voltage sensing up to 26V, current and RSSI inputs (3.3V max).
  • Power: VBAT up to 6s with voltage regulator 2.5A continuous 3.2A burst. Or 5v in (switchable with jumper pads)
  • LC filter: Yes, on OSD line
  • Filtered camera power: Yes