Electronics > Projects, Designs, and Technical Stuff

COVID-19 Emergency - Using UV Lamps to sanitize Face Masks overnight

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robca:

--- Quote from: bson on July 31, 2020, 08:24:46 pm ---
--- Quote from: Simon on July 31, 2020, 01:26:56 pm ---You just wash the masks and have a few.

--- End quote ---
Indeed.  Or if it's a single use, mist it with isopropyl alcohol until wetted through, and leave to dry.

--- End quote ---
Actually, no, don't use IPA or Ethanol

All the single use masks (esp N95) rely on electrostatic effects and alcohol (ethanol or isopropyl) removes the treatment. Also ruins the seal https://www.nih.gov/news-events/news-releases/nih-study-validates-decontamination-methods-re-use-n95-respirators. UV has a lot of problems, too (mostly: it doesn't penetrate deep into the fibers, and over time damages the materials used

The best domestic method to decontaminate a single use mask is 10-15 minutes in a 70C oven.Safe, easy to do, and scalable. Can find plenty of articles on this

Also, leave the mask unused for a few days in a dry location, and no virus will remain

NiHaoMike:

--- Quote from: helius on July 31, 2020, 03:39:19 pm ---BTW, flyback transformers do not create high voltage on their own, they require oscillator circuits. So I don't think your suggestion even works economically.

--- End quote ---
Trivial to make one with just the addition of a power transistor and a resistor, so easy I managed to do it in 6th grade. It doesn't take much power to make an arc that generates a significant amount of ozone, in fact keeping the power down greatly reduces the fire and electrode erosion problems.

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