LDO Nitehawk-SB V2 USB Toolhead Board for Voron StealthBurner

A Redesigned USB Toolboard for Voron StealthBurner

The LDO Nitehawk-SB V2 is a purpose-built USB toolboard for the Voron StealthBurner toolhead. It integrates an STM32G0B1 MCU, TMC2209 extruder driver, ADXL345 accelerometer, and an onboard USB Hub into a compact PCB that mounts directly on the toolhead. This design significantly reduces wiring complexity without forcing you into a CAN-based setup.

Key  Selling Points

• Native USB Klipper support- no CAN bus setup required
• All-in-one integration: STM32G0B1 MCU, TMC2209 driver, ADXL345 accelerometer, and USB hub
• Secondary USB port for connecting an additional USB device at the toolhead
• I2C expansion port for sensors, mods, and future upgrades
• Tacho feedback on hotend and part‑cooling fan ports for better diagnostics
• Enhanced ESD protection with dedicated grounding points and grounding cable support

Built Around the Standard Voron StealthBurner Platform

The Nitehawk-SB V2 is designed specifically for the standard Voron StealthBurner toolhead and works seamlessly with both Clockwork 2 and Galileo 2 extruder setups. It is suitable for builders who want a cleaner USB-based toolhead wiring system while keeping the StealthBurner ecosystem familiar and serviceable. It’s a great fit if you want a cleaner USB-based toolhead wiring solution while keeping the familiar, service-friendly StealthBurner ecosystem.

• Fully compatible with the Voron StealthBurner toolhead
• Supports Clockwork 2 and Galileo 2 extruder setups
• Designed for both drag-chain and umbilical cable routing
• Connects to any USB Klipper host (e.g., Raspberry Pi) via the USB Adapter PCB
• Ideal for Voron builders looking for simpler wiring, easier maintenance access, and less configuration hassle compared to CAN-based setups

Upgrade note for V1 users:

The V2 uses revised connectors compared to the original Nitehawk-SB. If you’re upgrading from V1, double-check the fan adapter, probe, thermistor, and endstop wiring before installation.

 USB Workflow, Cleaner Wiring, Fewer Setup Variables

The Nitehawk-SB V2 communicates over USB. Compared with CAN bus, the setup is more familiar to most Klipper users because it eliminates the need for a separate CAN hardware and software layer.

Typical installation steps:

Connect the toolboard to your Klipper host (e.g., Raspberry Pi) using the included USB adapter PCB, provide 24V power, and route the combined USB + power cable through a drag chain or umbilical setup.

Official Documentation: Nitehawk SB V2

GitHub Repository: Nitehawk-SB

Important Installation Reminders:

• Disconnect printer power before plugging or unplugging the toolhead cable or adapter-side connector.
• Secure both ends of the drag-chain cable and leave a small amount of slack - avoid over-tensioning during motion.
• In dry environments or ESD-prone setups, use the supplied grounding cable and follow the recommended grounding path.
• When compiling firmware, select STM32G0B1 (not RP2040). Do not reuse the original Nitehawk‑SB V1 firmware configuration.

Everything You Need to Upgrade your StealthBurner Toolhead

A standard Nitehawk-SB V2 kit typically comes with the following components:

• Nitehawk-SB V2 main board
• V2 StealthBurner Fan Adapter PCB
• USB Adapter PCB
• USB umbilical cable
• Grounding cable(s)– included depending on kit revision
• 24V power cable / USB data cable
• Assorted screws, terminals, and connectors for installation

Q1: Is Nitehawk-SB V2 a CAN toolhead board?

No. Nitehawk-SB V2 communicates with the Klipper host over USB. This makes it much easier to set up for users already familiar with USB-based Klipper devices.

Q2: What changed from the original Nitehawk-SB?

V2 upgrades the MCU from RP2040 to STM32G0B1 and adds: an onboard USB Hub, secondary USB port, I2C port, keyed fan adapter connection, revised JST-PH toolhead ports, and improved ESD protection.

Q3: Does Nitehawk-SB V2 support Input Shaping?

Yes. It includes an onboard ADXL345 accelerometer, allowing input shaper calibration without temporarily adding a separate accelerometer to the toolhead.

Q4: Can I connect another USB device at the toolhead?

Yes. V2 includes a secondary USB port via the onboard USB Hub, allowing an additional USB device to be connected at the toolhead without running a separate umbilical cable.

Q5: Does it support fan tachometer feedback?

Yes. Both the hotend fan and part cooling fan ports are three-pin tachometer compatible, supporting better diagnostics and pre-flight checks.

Q6: Does it support 5V fans?

Yes, but the default configuration is 24V. To use 5V fans, you must modify the fan adapter board according to the official instructions.

Q7: Can I reuse my old Nitehawk-SB V1 cable or fan adapter?

Do not assume V1 and V2 parts are interchangeable. V2 changes several connector types and the fan adapter connection interface. Always verify connector compatibility and pinout before installation.

Q8: What firmware target should I use?

Use the STM32G0B1 configuration for Nitehawk-SB V2. The original RP2040-based configuration is for the older Nitehawk-SB(V1) and should not be used for V2.

Q9: Why does V2 emphasize ESD protection?

Toolhead PCBs can be affected by static discharge, especially in dry environments. V2 improves ESD performance and provides dedicated grounding points, giving static charge a safe path to the printer frame or earth ground.

Q10: Who should choose Nitehawk-SB V2?

Choose V2 if you are building or upgrading a Voron StealthBurner and want cleaner wiring, USB-based Klipper setup, onboard input shaping, fan tach diagnostics, and better expansion potential without moving to CAN.