[HN Gopher] Building the Pocket CO2 Project ___________________________________________________________________ Building the Pocket CO2 Project Author : _Microft Score : 30 points Date : 2023-04-26 19:55 UTC (3 hours ago) (HTM) web link (bitbanksoftware.blogspot.com) (TXT) w3m dump (bitbanksoftware.blogspot.com) | gadgetoid wrote: | Laser cut Mylar stencils are an acceptable method of applying | solder to pads if you have the means. And solder paste syringes | are pricy but very, very handy if you need a little extra paste | somewhere specific. Great little project! It's been an age since | I hand assembled anything like this. Makes me wish I was tooled | up for more than just soldering headers. | londons_explore wrote: | Please can CO2 alarms become as common as smoke alarms...? | | Too much CO2 has pretty clear downsides[1], and probably takes | away far more productivity than people killed in fires, yet we | mostly ignore it in building codes worldwide. Whereas a new | building without smoke detectors would be illegal in much of the | world. | | [1]: | http://www.aretas.ca/sites/default/files/imce_images/Indoor%... | jrockway wrote: | Keeping an eye on CO2 is really interesting. I recently moved | from an apartment with an electric range to one with a gas | range, and CO2 gets as high as 3000ppm when I'm cooking | (compared to a baseline of around 700 or 800). I don't know | what the effects of this are, but the monitor reminds me to | ventilate during and after cooking. | | (I have my Airthings monitor bridged to HomeKit with Home | Assistant and it seems severe enough for Apple to send a | notification to my phone about it, by default. So I open | windows and am happy to be able to notice air quality issues | that most people will miss. I did turn off the notification | though, I know I'm cooking ;) | alach11 wrote: | Are you sure you have a CO2 monitor and not an eCO2 monitor? | | A lot of cheaper CO2 sensors really detect VOCs and try to | estimate CO2 from that. | jrockway wrote: | I have this: https://www.airthings.com/view-plus | | It ain't cheap. | patja wrote: | A similar project can be done without soldering using parts from | Adafruit, including a module for the Sensiron chip. Here is a | project I made using Adafruit's e-ink module and the SCD41 module | they sell: https://www.printables.com/model/121265-salud- | co2-monitor | bitbank wrote: | I need to add price details to my blog post. The main goal of | mine was low cost. The total cost for me to produce each board | is $17 where $14 of that is the SCD40 sensor. | patja wrote: | That's impressive! Mine was over $100. The SCD40 in module | format is $45. ___________________________________________________________________ (page generated 2023-04-26 23:00 UTC)