Description
The HDZero Gamma is a Digital-Ready HD AIO built on the STM32G473 MCU, using the 25.5x25.5mm Whoop/Toothpick pattern and optimized for 2.5–4 inch drones. An integrated serial 2.4GHz ExpressLRS receiver eliminates the need for a separate RX, reducing soldering, saving space, and making builds cleaner and easier.
Designed specifically for digital video systems, the Gamma includes a standard digital VTX plug and a protected 8V/3A high-power BEC to reliably support modern digital transmitters. A secondary 5V/3A rail powers LEDs, cameras, and other peripherals.
The onboard 32-bit 4-in-1 AM32 ESC delivers clean, stable power to the MCU and absorbs voltage spikes during rapid throttle changes, reducing the risk of brownouts, MOSFET failures, and motor damage. Each motor output supports 45A continuous with 60A bursts, providing ample performance for high-powered micro builds.
Purpose-built for digital FPV and drone soccer, the Gamma removes the analog OSD chip to save space and pairs ideally with the HDZero Whoop V2 VTX for a compact, low-profile digital stack.
Specifications.
Model HDZero Gamma AIO Flight Controller
Flight Controller
CPU STM32G473 (170MHz)
Gyro ICM42688
Block Box No
I2C Pads Yes
UART Pads TX1/RX1, TX3/RX3, TX4/RX4
ESC Telemetry RX4
VTX MSP UART TX1/RX1
Buzzer Pads Yes
LED Strip Control Yes
USB Type-C
Analog OSD No
FC Firmware Betaflight: HDZERO_GAMMA
ESC
CPU AT32F421 (120MHz)
Telemetry Supported
Input signal DSHOT 150/300/600, MultiShot, OneShot
Max Current 45Ax4 (Continuous) / 60Ax4 (Burst)
Current Sensor Scale = 107, offset = 0
ESC Firmware AM32 2.18
Target: AM32_HDZERO_HALO_F421_2.18.hex
ELRS Receiver
- Chip Set ESP32 + SX1280
- FC UART TX2/RX2
- RF Frequency 2.4GHz
- Max TX RF Power 10mW
- Antenna Interface 1x U.FL
- ELRS Firmware HDZero 2.4GHz | HDZero 2.4GHz AIO RX
BEC
- 5V 3A for LED strips and other peripherals
- 8V 3A for digital video transmitter
Dimensions
- Power Supply 3S ~ 6S
- Size 33x33mm with 25.5x25.5 M2 mounting holes
- Weight 8.4g
- Dedicated sockets for ESC, and HDZero and other Digital VTX's
Includes
- 1x HDZero Gamma AIO
- 5x M2 Rubber Grommet(5.6mm)
- 1x ELRS T-sharp short antenna (40mm)
-
1x XT30 cable with 330uF/35V capacitor (70mm)
User Manual