OpenSleep
The development of the hardware and software for this system started and most of it was done during my first semester at the Fluid Interfaces Group of the MIT Media Lab. This technology was used for many projects, Dormio being the most notable. This project is part of a larger iniatiative called Engineering Dreams, which seeks to build technology that interfaces with the sleeping mind.
The following is deprecated. We are about to release a new tutorial. Thanks for your patience!
Hardware
Components
| Qty | Value | Device | Where |
|---|---|---|---|
| 2 | .1uF | CAP_CERAMIC0603 | Digikey: 399-1095-1-ND |
| 1 | 1uF | CAP_CERAMIC0603 | Digikey: 399-5090-1-ND |
| 1 | 1K | R-US_0503 | Digikey: YAG1237CT-ND |
| 2 | 100K | R-US_R0603 | Digikey: YAG1235CT-ND |
| 3 | 1x2 | 1X2-SMD-HEADER | Digikey: S1113E-36-ND |
| 1 | 1x3 | 1X3-SMD-HEADER | Digikey: S1113E-36-ND |
| 1 | 1x5 | 1X5-SMD-HEADER | Digikey: S1113E-36-ND |
| 1 | RFD22301 | Digikey: 1562-1016-ND | |
| 1 | SPDT | SLIDE-SWITCH | Digikey: 401-2014-1-ND |
| 1 | Color | LED-1206-SMD | Digikey: 516-1436-1-ND |
| 1 | HR-SENSOR | Adafruit: 1093 | |
| 1 | FLEX-SENSOR | Adafruit: 1070 | |
| 2 | EDA-ELECTRODE-CABLE | OpenBCI | |
| 2 | EDA-ELECTRODE | OpenBCI |
PCB
Design
Schematic
Layout
Fabrication
You can either mill the PCB yourself using a CNC mill, or buy one from a PCB manufacturer.
Mill it
The original PCB for Doormio was made using a Roland MDX-20. All the PNG files used to mill the board can be found in the following folder:
/hardware/PNG
Order it
Software
Web App
Run the app:
node web_app/app.js
Open the app:
http://localhost:3000
Mobile App
Acknowledgements
Adam Horowitz led the experiment design and execution to validate the system, Oscar Rosello the interaction and form factor, and Eyal Perry the iOS app development, signal processing and classification (and great mustache). Matthew Ha continued the development of the iOS app and analysis of biosignals for sleep staging.