This week I will present my final project in detailed scope that could be defined by following questions:
With additional remarks related to my implication
Below you will found detailed presentation, and for for simple navigation you can use the questions above as the links to sections.
My main project is the "Oxymetric glow". The main goal of this project is to give to persons who have a disfunction related to respiratoire system to signal when oxygenation of the blood becomes not good (so the ratio of O2/CO2 is too low). This will be wearable electronic glow / bracelet / ring - that will regurarly measure the pulse and oxygenation and will alert in case of depased limits.
So I want to create an opensource, cheap and simple to produce, wearable oxymetric device. It should be accessible for the associations around persons with disfunctions like "Ondine curse" (syndrome d'Ondine), that in closest fablab we are able to produce the real prototype.
As well this device will not be a main monitoring device, the human attention and medical controls, but need to be used as an additional protection that may react as a backup control (in situations like cinema, car, party, when main attention may be alternated from the person that requires permanent monitoring)
Electronic part of my project contain the Attiny controllers, MAX30100 sensor, some LEDs, buzzers, bluetooth / sigfox adapter, battery, led display.
Oomoo resine for connector ring and for bracelet in casting realization (after the last review I probably need to check other resine that is more hard then oomoo), FlexiPlex filament in 3D printed realization, or simple glow (from sport shop) with attached components in simplified (total cover protection) realization. Below you will found BOM with more detailed list.
PCB that assebly all parts, the finger ring, the bracelet.
In producing PCB I use the electronic production process that include:
- PCB development (Eagle CAD development)
- Milling PCB
For Finger ring and bracelet - 3D printiing and (or) molding and casting. Selection of 3D printing is related to availability of this method. It becomes more and more poular and available for nearly every persons. So if somebody needs to reproduce any projects in own, the 3D printing sharing is the simplest way for today. (And of course molding and casting permit make a real mass production, with better finishing and quality)
- reducing size of finger-based pcb / ring (and solder minified version, as with reducing I have more and more difficulties to solder it)
- finishing alarm module
- finishing global communication problem (sigfox instead of bluetoots + phone?)
- data collecting / alerts forwarding central platform
- finish prototype v2 (aligned cards, fullsize bracelet (covered all cards inside), control of battery charge, etc..). Make it ready for stage 2 (give to real daytime usage in August)
I need at least to have a main controller, that communicate with the sensor card and that communicate to at least one of the reporting boards (BlueTooth, alarm board, SigFox, etc) and everything is places to wearable, autonomous device.
Regarding the lessons I have learned, skills I have got are covered in my project
In my project, some electronics parts I buy instead of build by myself just because few reasone