FPV Electronics > ESC (Electronic Speed Controllers)
The F421 Mini ESC is a compact electronic speed controller designed for high-performance RC models and small-scale robotics. Built around the AT32F421 microcontroller (ARM Cortex-M4 @ 120MHz), it delivers precise motor control with adaptive torque management, ideal for crawlers, drones, and industrial micro-machines requiring dynamic power regulation:cite[2]:cite[4].
| Component | Details |
| Processor | AT32F421 (Cortex-M4 @ 120MHz, FPU) |
| Memory | 64KB SRAM + 256KB Flash |
| Input Voltage | 2S-8S LiPo (7.4V-25.2V) |
| Continuous Current | 45A (Peak 80A for 10s) |
| BEC Output | 5V@3A (Switch-mode) |
| PWM Frequency | 8kHz-32kHz (Adjustable) |
| Control Algorithm | FOC (Field-Oriented Control) + Square Wave Hybrid |
| Dimensions | 30×20mm (20×20mm mounting) |
| Weight | 6.5g |
• Hybrid Drive: Sine+Square wave modulation for torque efficiency and smooth low-speed control:cite[2]
• High-Speed ADC: 2Msps sampling enables real-time current/temperature monitoring:cite[2]
• Adaptive Overcurrent Protection: Built-in comparator with <1μs response time:cite[2]
• Dual Telemetry: Supports DShot600 and Analog RPM feedback
• Waterproof Design: Conformal coating rated IP67 (submersion up to 1m)
• ✅ Betaflight (Target: MATEKF421)
• ✅ BLHeli_S (Customized version)
• ✅ VESC (Limited feature support)
• ✅ Arduino-based custom firmware
• Adaptive torque tuning for steep inclines:cite[2]
• Instant reverse thrust for obstacle recovery
• 32kHz PWM mode for ultra-low latency
• Precision servo-like control for robotic arms
• High-efficiency drives for CNC spindles
• 1x 1000UF 35V 10*20mm electrolytic capacitor
• 1x XT30-male 14AWG silicone cable 10cm length
• 1x SH1.0-8pins silicone cable (7cm, reversed)
• 5x M3*8mm shock-absorbing balls
