Trimix Analyser

prusaprinters

<p>This is my housing and sensor tube to go with the electronics of the trimix analyser.</p><p>The housing is as compact as I could make it around the electronics and components.</p><p>The analyser functions surprisingly well. The differences to the Divesoft analyser that uses a different technology is withing the measurement error of 1%, both for the oxygen as well as the helium content.</p><p>Biggest plus for me, is that this analyser is not sensitive to noise (as the Divesoft is) I can use it in the intake of my compressor (fed by a small pump) after my Trimix-Stick and double check what is going through the compressor, not having to rely only on the two oxygen sensors of the TMX stick</p><p>Part-List:</p><p>Housing:</p><ul><li>Front</li><li>Back</li><li>Button (to access the battery module, not strictly necessary)</li><li>Sensor tube</li></ul><p>Electronics:</p><p>(Links are examples)</p><ul><li>O2 Sensor (<a href="https://www.aliexpress.com/item/4001251139449.html?spm=a2g0s.8937460.0.0.10c32e0e4awVNS">https://www.aliexpress.com/item/4001251139449.html?spm=a2g0s.8937460.0.0.10c32e0e4awVNS</a>)</li><li>“He” Sensor MD62(<a href="https://www.aliexpress.com/item/32725880118.html?spm=a2g0o.9042311.0.0.27424c4djdDbgC">https://www.aliexpress.com/item/32725880118.html?spm=a2g0o.9042311.0.0.27424c4djdDbgC</a>)</li><li>Microcontroller Seeeduino (<a href="https://www.aliexpress.com/item/1005001728616918.html?spm=a2g0o.9042311.0.0.27424c4d7wiisY">https://www.aliexpress.com/item/1005001728616918.html?spm=a2g0o.9042311.0.0.27424c4d7wiisY</a>)</li><li>16bit ADC ADS1115 (<a href="https://www.aliexpress.com/item/32850495005.html?spm=a2g0o.9042311.0.0.27424c4dLEGYza">https://www.aliexpress.com/item/32850495005.html?spm=a2g0o.9042311.0.0.27424c4dLEGYza</a>)</li><li>Display (<a href="https://www.aliexpress.com/item/32844104782.html?spm=a2g0o.9042311.0.0.27424c4dkFcJHs">https://www.aliexpress.com/item/32844104782.html?spm=a2g0o.9042311.0.0.27424c4dkFcJHs</a>)</li><li>LiPo charger board (<a href="https://www.aliexpress.com/item/1005002265364454.html?spm=a2g0o.9042311.0.0.27424c4dCHGMHp">https://www.aliexpress.com/item/1005002265364454.html?spm=a2g0o.9042311.0.0.27424c4dCHGMHp</a>)</li><li>Voltage regulator LM317</li><li>Resistors</li><li>Trim potentiometers 1kOhm</li></ul><p>The circuit board was done in Fritzing (can't attach it here, unsupported file)</p><p>Idea &amp; Arduino code is largly based on these two projects (adapted to my components and preferences):</p><p><a href="https://github.com/captainigloo/Trimix-analyzer">https://github.com/captainigloo/Trimix-analyzer</a></p><p><a href="https://www.godive-brandenburg.de/downloadse2467a8c">https://www.godive-brandenburg.de/downloadse2467a8c</a></p><p>&nbsp;</p>