Brain rhythms in. Real-world actions out.
A wireless EEG board and an Arduino starter kit. Explore biosignals, build with blocks, and bring lights, motors and screens to life.
Actual hardware · Product photography from PiEEG
From your first sensor reading to a working experiment. Connect the kit, try a lesson, and build a rule of your own.
ConnectBluetooth + USB, both live at once
BuildDrag-and-drop blocks
RunWatch the hardware respond
Every lesson is a single rule, so students see cause and effect straight away. Pick a lesson, press the controls and watch the program and the hardware react.
Simulated signals to show the idea. Real recordings are noisier, and focus and relax are uncalibrated indicators.
The Octopus 16 is the brain side. The starter kit is the room side: it senses the room and acts on it. The web app reads both at the same time and links them with your blocks. You can also use either one on its own.
A round 16-channel board whose spring-loaded pogo pins are the electrodes, so there's no gel, no cap and no cables. A Seeed Studio XIAO ESP32-S3 on top streams the signal over Bluetooth, and the browser turns it into band power.
Elecrow's starter kit (SEA0004T): an Arduino Uno-compatible board with sensors and outputs already mounted in one case. It runs the OctoBio firmware, which you flash once from the browser.
Biology, electronics and programming in one experiment, with the same setup from primary school to university.
Brain rhythms (delta, theta, alpha, beta, gamma), why alpha rises when the eyes close, and the artifacts that blinks and jaw clenches leave in the signal.
Sensors and actuators, analog vs digital, I2C, serial communication, units and ranges.
If / else, loops, thresholds, mapping one range onto another, and combining two signals into one decision.
Same kit, same lessons. Move up a level as the class does.
Open the lab, flash once, connect, put it on, build. Everything happens in one browser tab at octobridge.pieeg.com.
The box has both devices. You add the power bank and the computer.
Go to octobridge.pieeg.com in desktop Chrome or Edge. The lab needs Web Bluetooth and Web Serial, which only those browsers have.
Safari and phones can't open USB serial. No account, no install, and the Bluetooth and USB connections stay in the tab.
| — | Home | What you can read, what you can move, ready mixes |
| — | Flash | Put firmware on the boards. First time only. |
| 1 | Connect | Pair the Octopus 16 and/or the starter kit |
| 2 | Board | Live numbers, lights, motor and screen |
| 3 | Blocks | Stack a program and run it |
| 4 | Learn | What a reading is allowed to mean |
| 5 | Write | The same program, written like a page |
| 6 | Repeat | Six ready machines to run and remix |
Open Flash, plug each board in with a USB data cable and install its firmware from the browser. No Arduino IDE. You only do this the first time.
On Connect, pair the Octopus 16 over Bluetooth and pick the starter kit's serial port. Both stay live at once. Skip a device you don't have: its numbers stay still until it's connected.
When the kit's port opens, the board restarts. Wait until its status says live.
Octopus-16-XXXX in the Bluetooth picker.INF protocol=1 readyStrap the Octopus 16 over the back of the head (the visual cortex) so alpha shows up clearly. Press it straight down so every pin touches the scalp.
The board has no isolation from its power supply. While it's on a head, it runs from the power bank only, never plugged into a computer. Try each option.
On Board, look for the EEG ok check: RMS between 2 and 200 µV. Then run the two quick tests below. If they behave as described, you're reading real biosignals.
A blink or a jaw clench raises RMS and gamma. That's muscle, not a thought, and a good first lesson.
Open Blocks, stack forever, if, wait and a move, and press run. The program runs live and sends commands to the kit, so there's no compiling and no second sketch to flash.
Start with Follow the knob: it needs no headset. Then try a ready mix from Repeat, or the lessons above.
Everything in the kit, plus the web app that ties it together.