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Regulating Carbon Dioxide flow electronically

Discussion in 'General Electronics Discussion' started by dwreck, Aug 19, 2012.

  1. dwreck

    dwreck

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    0
    Aug 19, 2012
    Hey guys, I have a project I'm currently working on. Using an arduino, I want to control the release of carbon dioxide from a small cartridge (8 or 16 grams) and stop it after a certain amount of time. I don't have much experience in the Electronics department, so I don't know a lot of useful components to do the job.

    I'm thinking of using 9V, but the arduino will be connected with its own supply. Would a solenoid valve do the job? Or would I need something else in combination? Can I also use a needle valve?

    Thanks in advance. I appreciate your help and recommendations :)
     
  2. CocaCola

    CocaCola

    3,635
    4
    Apr 7, 2012
    Explain further, how much and how regulated is the release, is it a metered amount? A open slow flow for a period of time? A burst flow at a rapid rate? Or what?

    Describe your application further...
     
  3. dwreck

    dwreck

    27
    0
    Aug 19, 2012
    Sorry for not giving much details in my post. It's not a metered amount of co2 released, but rather a burst flow at a rapid rate. Enough to move a miniature car of length 15cm and width 8cm. The flow will be stopped after a short period of time by the arduino depending on the distance the car has moved. The specific time will be known through a process of trial and error. I hope it's much clearer now. And thanks for replying.
     
  4. CocaCola

    CocaCola

    3,635
    4
    Apr 7, 2012
    A solenoid valve should do the trick, you might find that a small expansion chamber might allow you to get more of an immediate 'burst' as you won't be limited (when initially opened) by the small output hole in the cartridge...
     
  5. dwreck

    dwreck

    27
    0
    Aug 19, 2012
    With the solenoid valve, I'll have to pierce the hole in the co2 cartridge myself, right?
     
  6. CocaCola

    CocaCola

    3,635
    4
    Apr 7, 2012
    Yeah, and contain it... You can get the 'piercer' and containing chamber from an old seltzer bottle, an airsoft gun or even make one with a short section of pipe...
     
  7. dwreck

    dwreck

    27
    0
    Aug 19, 2012
    Last edited: Aug 20, 2012
  8. CocaCola

    CocaCola

    3,635
    4
    Apr 7, 2012
    Something like that will work, you need to take a tire valve stem permanently attach it to that device, and permanently squeeze the trigger... The solenoid will be on the other end of the valve stem acting as the new on/off valve...

    A valve stem like this... Random example

    http://www.ryderfleetproducts.com/r...em-1-8-Npt-3-4-Long-Each/erm/productDetail.do

    Will convert you to normal pipe threads, so that you can likely connect it directly to the solenoid valve...
     
  9. dwreck

    dwreck

    27
    0
    Aug 19, 2012
    Thank you so much for your help. I'll try two methods: One as you described and the other one with a mechanism which presses the co2 inflator trigger when initiated.
     
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