The NiteHawk SB is a toolhead board with an integrated RP2040 MCU, TMC2209 driver and accelerometer. The form factor is based on HartK’s two-part Stealthburner Toolhead PCB, but comes with a few small changes.

Features at a glance:

Based on Klipper USB,
Additional hardware or software setup is not necessary,
Very simple wiring – a single cable runs through the drag chain or in an umbilical setup,
Breakout cables are not required
Tachometer-capable fan connectors (PCF and HEF) enable fan speed detection,
Integrated acceleration sensor for comfortable input shaping.

⇒ GITHUB

System Overview

The Nitehawk system consists of three PCBs and the Umbilical Cable. A simplified wiring diagram is shown below:

Nitehawk-SB, this is the main PCB, which houses the MCU, stepper driver, fan drivers, and other circuits.
Fan Adapter, this is simple PCB receives the part fan, hotend fan, and neopixels and connects them to the main Nitehawk PCB via headers. The main purpose of this seperation is to allow the Stealthburner front to be easily detactable for maintenance.
Umbilical Cable, this is a custom flex cable that is rated for drag chain use. It delivers 24V power to the main Nitehawk PCB while also carrying USB data.
USB Adapter, this simple PCB combines 24V power from the power supply and USB data from the Raspberry Pi into a unified connection to the main Nitehawk PCB via the Umbilical cable.