Nitrox analyser
Most important thing you have to know about our Nitrox Analyser ...
The most important thing you have to know is that we are divers and we don't want to use a black box made by a company. Whe want to UNDERSTAND the system and we want to be able to OPEN and AUDIT it. We can't trust something not transparent, that's all !
Open source and Open hardware are essential to establish our trust relation. For hardware everything is not as open as whe would like ... but we do our maximum to use as open as possible hardware.
There is a lot of divers who made "do it youself" nitrox analiser, for example:
- https://ejlabs.net/diy-nitrox-analyzer/
- https://ejlabs.net/arduino-oled-nitrox-analyzer/
- http://aspttlyonplongee.free.fr/matos/analyseur_oxy_arduino.pdf
- .../...
A do-it-yourself Nitrox Analyser
Here is the list of furniture you need to set up your free Nitrox Analyzer:
- used O2 sensor from your CCR or from a friend :-)
- power switch 0.5€ french e44 store | amazon
- 9v battery connector 1,5€ french e44 store | amazon
- Arduino Nano 21€ french generation robot store | amazon
- ADS 1115 15€ french generation robot store | amazon
- oled screen 0'96 128x64 15€ conrad store | amazon
- A Molex connector or a jack connector or ... (it depends on your 02 sensor)
- Some of electric wire
- A soldering kit
- A PCB : an experimental one or a GasBlender.org one :)
A ready to use PCB from Gasblender.org
Fritzing file is available here https://github.com/gasblender/hardware/tree/master/mainboard-v01
A ready to print 3D case from Gasblender.org
Please download and print parts from https://www.thingiverse.com/thing:4579361 or https://www.thingiverse.com/thing:3257130 (old project)
STL files and FreeCAD source file are here : https://github.com/gasblender/nitrox-case
Our first "daily used" prototype
This one is in action since 2018 ! Not very sexy but "it works" !
Here is our first prototype with a do it yourself PCB :-)
Easy to find component
We would like to be able to build a Nitrox analyser where whe are around the world. So we choose to reuse some available products such as o2 cells from CCR rebreathers and others easy to find parts.
Free software
All of software we wrote is under GNU/GPL licence and All of software we use is free software too (for example Fritzing to make PCB parts). Source code for Arduino is build with Arduino kit.
Cheap
Please take cheap parts if you don't want to put a lot of money in your Nitrox Analyser ! For example if your CCR uses Molex connector for O2 Cells you just have to use the right cable and if you need an other sort of adapter you can do it if nobody did it before.
Do it yourself
Follow the documentation and learn how to build your own Nitrox Analyser ! What could be more interresting ? By doing your own analyser you learn the concept and understand what it does.
Repair by yourself
Something get wrong ? open it and repair it by yourself ! All of our products are designed to be self-repairable by users !
Reuse and don't trash CCR Parts
Our Nitrox analyser uses CCR Parts: 9v battery and O2 Cells. Not enought power for your CCR ? but sure enougth for Nitrox Analyser. O2 Not enought good for 1.6 ppo2 ? but goot enought for Nitrox less than 50% ...
Pricing table (if crowdfunding complete)
Join us and support our crowdfunding campaign
We need your help to build our stuff and release electronic parts for Nitrox Analyser and TriMix Analyser ...
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