[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)