ahaucnx

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by ahaucnx 5y ago
You can just power it with the USB cable from a power bank.
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by ahaucnx 5y ago
Yes that might be a good idea but I am very happy that so many people are interested in building one and that we can increase the awareness on air quality so I am happy to do the work ;)
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by ahaucnx 5y ago
There is no secret sauce needed. The Plantower sensors tell you the PM2.5 in micrograms directly and we just display it to the OLED display or send it to a server. It is all open source so you can check the code.
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by ahaucnx 5y ago
A solution that one of our customers uses (Prem Tinsulanonda International School) is the installation of a positive pressure system. They are able to achieve near zero AQI in their classrooms when you have more than 300 US AQI outside. You
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by ahaucnx 5y ago
Another solution is to install a positive pressure system with high performance HEPA filters. This is especially recommended if you live in areas with very high air pollution. Positive pressure systems can virtually achieve zero AQI inside
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by ahaucnx 5y ago
Yes the Senseair S8 is very good. Only problem is that the automatic baseline calibration sometimes needs 7-10 days to kick in. But you can also do a manual calibration.
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by ahaucnx 5y ago
Yes, we will ship worldwide. Please send me a message from our website and the number of PCBs you would like to get and I will check the postage.
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by ahaucnx 5y ago
We use the Senseair S8 CO2 sensor which is very accurate and of high quality. Some of the TVOC sensors give an estimated CO2 level (eCO2) which is not recommended because these values are not very accurate. To send me a message please go to
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by ahaucnx 5y ago
Thank you for all of you interested in getting the PCBs. To send me a message please go to https://www.airgradient.com/diy/ and send me a message with the orange chat button. Thanks!
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by ahaucnx 5y ago
Thank you for this extensive resource on air quality. Yes, it needs to get more attention as it is one of the main drivers of mortality of environmental risks. One thing one has to bear in mind is that often when you optmize your home for l
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by ahaucnx 6y ago
Thanks for mentioning our DIY sensor building instructions. Can you please let me know what exactly is outdated so that I can update it. Also I am more than happy to give people trial access to our dashboard. Just PM me via the support for
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by ahaucnx 6y ago
I am also living in an area with high periodic air pollution from wildfires. I have now removed all my stand-alone air purifiers and replaced them with a positive pressure system that works so much better. I wrote about the benefits of tha
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by ahaucnx 6y ago
Yes I agree. There are a lot of non or low performing units out there that are hyped up by marketing and dubious claims. My startup [1] does air quality measurements primarily for schools and we very often come across schools that wasted a
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by ahaucnx 6y ago
Be aware that some of the whole house systems might not have a fresh air intake. This can lead to relatively high CO2 levels inside the building and affect wellbeing and cognitive performance.
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by ahaucnx 6y ago
I am living in Northern Thailand that goes through the annual smoke season with often US AQI beyond 300 and in the Hazardous area. That experience lead to the foundation of my startup AirGradient [1]. More and more people here are moving be
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by ahaucnx 6y ago
One should also not forget high CO2 developments in classrooms and its impact on test scores. We measured these in a school last year and it regularly went above 3000ppm [1]. Studies show cognitive impacts already at relatively low increase
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by ahaucnx 6y ago
Very nice project! I have a question on the light and sound sensor you use. Are these able to output calibrated values eg in Lux and dB?
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by ahaucnx 6y ago
Yes. The pcb board actually has through holes to connect other sensors to unused IOs and you can easily adjust the software because it is open source.
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by ahaucnx 6y ago
The is a contact us button on the website. Just use that.
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by ahaucnx 6y ago
I mentioned it in previous posts. We have easy to use open hardware and software build instructions [1] for an air quality monitor based on a Wemos D1 mini. More than happy to help anybody who wants to build one. I have some PCBs left and c
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by ahaucnx 6y ago
Great to see that air quality and the health impacts of fine dust getting more and more attention. Talking about "smarter kids", we should not forget the impact of CO2 on cognitive performance. In order to run air purifiers effect
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by ahaucnx 6y ago
I came up with the idea of a hardware startup called AirGradient [1] focusing on indoor air quality monitoring due to annual recurring wildfires in my region and the wish to help my local school here in managing this better. Very soon I rea
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by ahaucnx 6y ago
We have open source, open hardware build instructions for a very reliable Air quality sensor that can be used to measure PM2.5 and also CO2. https://www.airgradient.com/diy/ We have tested it extensively and it is very
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by ahaucnx 6y ago
Yes I agree. I totally love the ESP8266. Especially on the Wemos D1 Mini board. We use it for our open source air quality sensor. https://www.airgradient.com/diy/
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by ahaucnx 6y ago
I am the author of these build instructions. Would be great to hear your feedback and from other people who build air quality sensors.
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Build Your Own PM2.5 / CO2 Air Quality Sensor(airgradient.com)
3 points by ahaucnx 6y ago|1 comments
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by ahaucnx 6y ago
You can build your own air quality sensor with our instructions. Our sensor uses the same PM sensor like in the purple air. You can build it for <USD 20. https://www.airgradient.com/diy/ BTW: Our main product is an
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by ahaucnx 6y ago
We are a new startup (currently doing Startup School) to provide air quality monitoring solutions especially for schools. From the beginning it was important for us to give back to the community so we setup AirGradient for Education providi