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  • Author Author: dwinhold
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Safe and Sound : Winter/Cold Weather Survival Suit Blog#9

dwinhold

This update is about water proofing my project. Everything done here is the first time I ever worked with this product and it was done live, so if it fails we will all see it go wrong. There are 3 videos attached, the first is showing the product, second is applying it to the board and third is putting the powered board under running water.

 

I use an Arduino Uno as a test so if this doesn't work I don't wreck the MSP432.

 

So, what do you think? Will it work? Fail? Here is the challenge, post below before you watch the last video and say weather you think it worked or if I ruined my Arduino Uno. Don't give it away (at least for a couple of days) after you watch.

 

Video #1 (The Acrylic Conformal Coating)

 

 

 

Video #2 (Spraying it on the board) **As a note - Take every safety precaution when using this, it is poisonous**

 

 

Video #3 (Water testing)

 

 

Hope you enjoyed watching.

 

Dale Winhold

Parents

  • Water and electronics are an interesting mix.

     

    From my observations over the years, it is not immersion in clean water that causes a problem.

    High frequency circuits my have some changes due to the capacitance change.

     

    Moisture that is trapped under or around components, usually as a result of dust build-up causes the greatest issues.

    I've also seen moisture affecting the flux that was not cleaned off a commercial product cause issues, but once cleaned worked fine.

     

    It's not until the drying out and corrosion phase that the issues come forth, and I suspect electrolysis has something to do with some aspects.

     

    I've also seen it attack vias on the pcb corroded such that they were no longer a link between the two layers.

    I suspect it was a combination of the dissimilar metals used during the process (older pcb) that caused it.

     

     

    Some time ago we were repairing Japanese manufactured automotive products and they seem to have been dipped in a coating.

    It was an absolute pain when it came to fixing it, but it certainly kept moisture out.

     

     

    Mark

Comment

  • Water and electronics are an interesting mix.

     

    From my observations over the years, it is not immersion in clean water that causes a problem.

    High frequency circuits my have some changes due to the capacitance change.

     

    Moisture that is trapped under or around components, usually as a result of dust build-up causes the greatest issues.

    I've also seen moisture affecting the flux that was not cleaned off a commercial product cause issues, but once cleaned worked fine.

     

    It's not until the drying out and corrosion phase that the issues come forth, and I suspect electrolysis has something to do with some aspects.

     

    I've also seen it attack vias on the pcb corroded such that they were no longer a link between the two layers.

    I suspect it was a combination of the dissimilar metals used during the process (older pcb) that caused it.

     

     

    Some time ago we were repairing Japanese manufactured automotive products and they seem to have been dipped in a coating.

    It was an absolute pain when it came to fixing it, but it certainly kept moisture out.

     

     

    Mark

Children
  • in reply to mcb1

    Hi Mark,

     

    Thank you for the reply. I definitely agree that water and electronics aren't a good mixture. Clean water is what was the closest for this experiment, I will have to try it out in salt water as well. For my project, being a winter/cold weather suit, getting wet is a reality. I require some kind of protection against this. Most of the time it will be clean water that would invade the suit and if the board does get wet, drying it out properly would be a priority.

     

    Dale