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Octopus 16, Brain-Computer interface with 16 EEG channel
$250.00
Availability:
In stock
SKU
PIA24027P
Weight
60g
Related Products:
Octopus 16, Brain-Computer interface with 16 EEG channels, all in one
Frequently Bought Together
* XIAO ESP32S3 - not included in the package
Octopus 16 packs sixteen EEG electrodes, a common reference, and a ground into a single 26 mm circular PCB — a coin-sized cluster of spring-loaded pogo pins. Because reference and ground live inside the same footprint as the active channels, no distant electrodes are required: the whole montage sits locally on the scalp and streams 16-channel data over Bluetooth Low Energy 5 to a host, a USB dongle, or straight to the browser.
YouTube Hardware Review
Software - PiEEG Server
Hardware
| DC | 2 × Texas Instruments ADS131M08 |
| ADC type | 24-bit, 8-channel, simultaneous-sampling, delta-sigma (ΔΣ) |
| Channel count | 16 (8 per ADC) |
| Resolution | 24-bit per channel (transmitted as 3 bytes / channel) |
| Programmable gain (PGA) | Per-channel, ×1 – ×128 (set in firmware; default gain register 0x2222) |
| Input high-pass / DC block | Integrated ADC DC-block filter enabled (≈ >1 Hz) |
PCB
| Parameter | Value |
|---|---|
| Form factor | Circular PCB, 26.0 mm diameter |
| Layers | 4-layer (F.Cu / In1.Cu / In2.Cu / B.Cu) |
| Target placement | Pz (parietal); works as a fully local montage anywhere on the scalp |
| Enclosure | 3D CAD included (p70-2100045, IGS + STP) |
Electrodes
| Parameter | Value |
|---|---|
| Contact type | Spring-loaded pogo pins, ⌀4 × 11 mm SMD |
| Total pins | 18 |
| → Active signal (+) | 16 channels |
| → Reference (−) | 1 (common AINREF) |
| → Ground | 1 (GND) |
| Pin pitch (center-to-center) | ≈ 5.38 mm (uniform hexagonal packing; measured min 5.37 / max 5.39 mm) |
| Array span | ≈ 20.3 × 20.3 mm, all pins within a ~10.5 mm radius of center |
| Reference/ground routing | Selectable via on-board jumpers (AINREF_POGOPIN_ON, AINREF_STACK_ON, GND_ON, STACK_1/2) for stacking or single-board use |
Support via Discord (1K community) or PiEEG email
website pieeg.com
* not a medical device. Please read the liability before you start to use it
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