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  • Author Author: ninjatrent
  • Date Created: Date Created
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UV LED Sterilization Lamp

ninjatrent
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Fighting Germs

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This a demo of a UV LED Sterilization Lamp. The purpose of this device is for safe storage of PPE or other items. With shortages of PPE, it is imperative that we develop means for safe and sterile reuse of what is available.

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*Warning!! UVC Wavelength Light is recommended!!

 

*This project is a FAIL! Do not use UV/UVA 400nm LEDs!!

 

*UV/UVA wavelength not effective at sterilization of viruses. Only use exact recommended UVC Wavelength!!!

 

https://en.m.wikipedia.org/wiki/Ultraviolet

 

 

UVA/UV 400nm LEDs have been soldered to an Adafruit Perma-Proto Breadboard. There's a 100 ohm resistor connected to each LED ground. Power is supplied by a 5V 2A power supply with a barrel- type plug. This circuit is based from a tutorial provided by Adafruit and written by Becky Stern.

https://learn.adafruit.com/uv-manicure-lamp/overview

 

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The temporary enclosure was made from foam board and duck  tape.

Please remember that UVC Wavelength is recommended. This project is only a demo.

Trent

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  • Hi Trent,

     

    This is a nice innovative build. Did I understand that the light produced is UVA? UVA may not have the energy necessary to kill most pathogens. UVC with wavelengths between 200 and 300 nm is what I have seen recommended for killing germs and viruses. Since it is the direct radiation that kills the pathogen it might be a good idea to line the box with aluminum foil with the shiny side acting as a mirror. This will allow the light to bounce around and get into cracks and crevices of the item you are sterilizing.

     

    John

  • in reply to jw0752

    Hi John,

    Thank you very much. The LEDs are reported to be UV/UVA 400nm https://www.adafruit.com/product/1793  . I have considered the addition of reflective Mylar to the inside of the box. Thank you for bringing it to attention that the UVC spectrum is recommended. I leave my mask in overnight and when not in use. This is a extra measure on top of sterilization with 91% iso alcohol and diluted bleach (not at same time). Now wondering if these UV/UVA LEDs are in anyway effective in killing the virus.

    Trent

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  • in reply to jw0752

    Hi John,

    Thank you very much. The LEDs are reported to be UV/UVA 400nm https://www.adafruit.com/product/1793  . I have considered the addition of reflective Mylar to the inside of the box. Thank you for bringing it to attention that the UVC spectrum is recommended. I leave my mask in overnight and when not in use. This is a extra measure on top of sterilization with 91% iso alcohol and diluted bleach (not at same time). Now wondering if these UV/UVA LEDs are in anyway effective in killing the virus.

    Trent

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