F3 Brushed Flight Control Board Based On SP RACING F3 EVO Brush for Micro FPV Frame

The F3 Brushed Flight Control Board is a compact flight controller specifically engineered for brushed motor micro FPV quadcopters and racing drones, delivering precise gyroscopic stabilization and real-time attitude control. Professional FPV pilots and drone racing enthusiasts utilize this board to achieve responsive flight dynamics, low-latency control response, and reliable autonomous stabilization in high-speed aerial maneuvers. This flight controller solves the critical challenge of maintaining stable flight on ultra-lightweight micro frames where weight distribution, processing power, and sensor accuracy directly impact performance and flight endurance.

Product Overview

The F3 Brushed Flight Control Board operates on advanced gyroscopic sensing technology with integrated accelerometers and barometric pressure sensors that continuously monitor aircraft orientation and altitude in real-time. The board processes sensor data through a high-speed 32-bit ARM Cortex processor, executing flight stabilization algorithms at 8000 Hz gyroscope sampling rate, which ensures smooth correction of roll, pitch, and yaw axes even during aggressive maneuvers. The SP Racing F3 EVO architecture features optimized firmware specifically tuned for brushed motor characteristics, eliminating the timing delays and synchronization issues common in generic flight controllers when driving direct-drive brushed motors at variable speeds.

This flight control board incorporates a sophisticated PID tuning system that allows pilots to customize response sensitivity across all three axes, critical for adapting to different frame weights, motor configurations, and flying styles. The integrated 4-in-1 ESC support architecture enables seamless communication with electronic speed controllers, synchronizing motor commands with flight stabilization inputs to achieve coordinated movement. Built-in barometric altitude hold functionality and accelerometer-based leveling mode provide both manual acrobatic flying capability and assisted stable flight modes, making this board suitable for beginners learning FPV fundamentals as well as experienced racers executing complex aerial tricks.

Key Specifications

Specification	Details
Product Type	Brushed Motor Flight Control Board
Brand	SP Racing F3 EVO Compatible
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Processor	32-bit ARM Cortex M4 CPU
Gyroscope Sampling Rate	8000 Hz
Motor Channels	4 brushed motor outputs
Input Voltage Range	3.5V to 6V DC
Operating Temperature	-10 to 60 degrees Celsius
Board Dimensions	Micro form factor optimized for 65-85mm frames

Key Features

• 32-bit ARM Cortex M4 processor delivering 8000 Hz gyroscope update rate for ultra-responsive flight stabilization and minimal control latency
• Integrated 6-axis IMU with 3-axis gyroscope and 3-axis accelerometer for accurate orientation tracking and self-leveling flight modes
• Brushed motor optimized firmware with synchronized ESC communication protocol ensuring smooth motor acceleration and coordinated multi-rotor control
• Onboard barometric pressure sensor enabling altitude hold mode and automatic descent rate control for stable hovering and terrain following
• PID tuning interface with customizable gain values for roll, pitch, yaw, and altitude control allowing fine-tuning for specific frame characteristics
• Multiple flight modes including Manual Acrobatic, Self-Level Stabilized, and Altitude Hold for versatile flying applications
• Compact micro form factor design weighing under 5 grams, critical for maintaining center of gravity on ultra-lightweight racing frames
• Wide input voltage compatibility from 3.5V to 6V supporting single-cell LiPo through 2S battery configurations

Applications and Use Cases

• Micro FPV Racing Drones: Provides the precise gyroscopic control and low-latency response required for competitive drone racing through tight gate courses and obstacle courses
• Indoor Acrobatic Flying: Enables aggressive flips, rolls, and inverted maneuvers in confined spaces with responsive attitude correction preventing uncontrolled tumbling
• FPV Training Platforms: Offers beginner-friendly self-leveling mode combined with manual control capability, allowing new pilots to learn fundamental FPV skills progressively
• Micro Aerial Photography: Altitude hold and barometric stabilization enable smooth cinematic video capture from lightweight platforms suitable for confined indoor and outdoor environments
• Autonomous Waypoint Navigation: Supports programmable flight paths with GPS integration capability for delivery drones and surveillance applications on micro platforms
• Research and Development: Provides accessible flight control platform for robotics students and engineers developing custom aerial vehicle control systems and algorithms

How to Use

Begin by mounting the F3 Brushed Flight Control Board at the center of gravity of your micro FPV frame, ensuring the board orientation aligns with forward-facing direction marked on the PCB. Connect the four brushed motor outputs to your ESC signal pins in the correct sequence: Motor 1 to front-right, Motor 2 to rear-left, Motor 3 to front-left, Motor 4 to rear-right. Power the board through the dedicated 5V input from your battery or ESC power rail, ensuring voltage stays within 3.5V to 6V specification. Connect your RC receiver to the designated input channels, typically using PPM or SBUS protocol depending on your transmitter and receiver combination.

After hardware assembly, connect the flight controller to your configuration software via USB cable and perform mandatory calibration steps: first, calibrate the accelerometer by placing the board level on a flat surface and running the accelerometer calibration routine; second, calibrate the gyroscope in a stationary position with zero motion; third, set your motor directions and verify all four motors spin in correct rotation direction when armed. Configure your desired flight mode preferences, PID gain values, and failsafe behavior through the configuration interface. Start with conservative PID values and gradually increase responsiveness based on flight testing feedback. Always perform a ground test by arming the board, verifying motor response to control inputs, and confirming all safety checks before attempting first flight.

Frequently Asked Questions

What is the difference between brushed and brushless flight controllers and why does this board specify brushed motor compatibility?

Brushed motors use mechanical commutation via carbon brushes, requiring different electrical timing and signal characteristics compared to brushless motors that use electronic commutation. This F3 board is optimized for brushed motor ESCs with firmware that accounts for brushed motor acceleration curves, reducing synchronization delays and improving response smoothness. Brushless flight controllers apply higher frequency PWM signals unsuitable for brushed ESC timing, causing jerky control and potential motor stalling. Using a brushed-specific controller ensures optimal performance and reliability on micro frames where brushed motors are standard due to their compact size and weight advantages.

Can I use this flight controller with 1S, 2S, or 3S LiPo batteries?

The F3 Brushed Flight Control Board accepts input voltage from 3.5V to 6V DC. This means it supports single-cell 1S LiPo batteries (nominal 3.7V, minimum 3.5V) and two-cell 2S LiPo batteries (nominal 7.4V requires voltage regulation). For 2S batteries, you must use a dedicated BEC (Battery Elimination Circuit) or voltage regulator to step down 7.4V to safe 5V input. Do not directly connect 2S batteries without regulation as overvoltage will damage the board. Three-cell 3S batteries exceed maximum voltage specification and will permanently destroy the flight controller.

How do PID values affect flight performance and what adjustments should I make for my specific frame?

PID tuning controls how aggressively the flight controller corrects aircraft attitude deviations. P (Proportional) gain determines immediate correction strength, I (Integral) gain eliminates steady-state drift over time, and D (Derivative) gain dampens oscillations and reduces overshoot. Heavier frames require higher P values for adequate correction force, while lighter frames need lower P to prevent oscillation. Start with manufacturer default values, then increase P by 10-15% increments during test flights until you observe slight oscillation, then back off slightly. Adjust D gain to eliminate any wobbling during fast maneuvers. Conservative tuning prioritizes stability while aggressive tuning enables faster response but risks instability if overdone.

What flight modes does this board support and how do I switch between them?

The F3 Brushed Flight Control Board supports three primary flight modes: Manual Acrobatic mode allows full 360-degree flips and rolls with no automatic correction, Self-Level Stabilized mode automatically levels the aircraft when control inputs are released, and Altitude Hold mode maintains current altitude using barometric sensor feedback. Mode selection is typically assigned to an auxiliary channel on your RC transmitter, allowing in-flight switching between modes. Configure mode assignments through the flight controller software interface before flight. Always test mode switching on the ground with motors disarmed to ensure correct behavior before attempting aerial transitions.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
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• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
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• Returns: 7-day return policy on manufacturing defects only

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