Ben Jabituya was looking at commercial products for sleep monitoring using EEG, and thought to take a look at more DIY based approaches using some open source sensor boards and a basic microcontroller.
I had a Feather M0 Adalogger around from a previous project so decided to go with that. By all accounts the ATSAMD21 chip has a decent ADC and the SD card meant I can record and process data between the board and my PC easily. It’s also pretty small and has a connector for a battery so can be built into a wearable pretty easily.
The code used on the Feather and a Python script to generate a spectrogram from the raw data files is on GitHub.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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