Knight Board IMU

The Knight Board IMU is the same Knight Board you already know — with a 9-DOF inertial measurement unit (IMU) built directly onboard. It captures accelerometer, gyroscope, and magnetometer data in the same BrainFlow stream as your EEG/biosignal channels, with no extra wiring or hardware required.

Key Features

9-DOF motion sensing. Three axes each of acceleration, angular velocity, and magnetic field — all sampled at 125 Hz alongside your EEG data. Use it for head tracking, motion artifact detection, or noise reduction in your pipeline.

Zero new wiring. Same form factor, same connectors, same workflow as the standard Knight Board. The IMU variant simply adds motion channels to your existing BrainFlow session.

BrainFlow and LSL, out of the box. IMU channels stream natively via BrainFlow and Lab Streaming Layer — no extra drivers or configuration needed. Use board ID NEUROPAWN_KNIGHT_BOARD_IMU to access IMU data.

Specifications

EEG

Parameter	Value
Channels	8, adjustable gain (1 – 12)
Reference	Auricular (ear clip)
Electrode types	Dry spike, wet spike, gold-cup, EMG, ECG, active
Sampling method	Referential or bipolar montage, 8 × 16-bit ADC
Sampling rate	125 SPS (default) / 250 / 500
Detection range	±333 mV
Detection step	10.2 µV (at gain = 12)
Bandwidth	1 – 62.5 Hz
Filtering	Common-mode noise filter, 50/60 Hz notch (2nd order)
CMRR	−120 dB
Software	BrainFlow, LSL, NeuroPawn EXG Visualizer

IMU

Parameter	Value
Axes	9-DOF — 3-axis accelerometer, 3-axis gyroscope, 3-axis magnetometer
Resolution	16-bit per axis
Sampling rate	125 Hz (default) / 250 / 500

Connectivity & Power

Parameter	Value
Connection	USB-C (bus-powered)
Operating voltage	5 V
Streaming	Real-time

IMU Channel Indices (BrainFlow)

When using NEUROPAWN_KNIGHT_BOARD_IMU, the IMU data is available at the following BrainFlow channel indices:

Channel index	Signal
`11`	Accelerometer X
`12`	Accelerometer Y
`13`	Accelerometer Z
`14`	Gyroscope X
`15`	Gyroscope Y
`16`	Gyroscope Z
`17`	Magnetometer X
`18`	Magnetometer Y
`19`	Magnetometer Z