Art
2017-08-27 20:01:14 UTC
Hi All,
I became interested in low power usb ionic air fresheners as an
alternative to the very expensive USB Killer. The ionic air fresheners
sell from $0.19 to ~$2 at that online auction place. I think the
highest I ever paid for one is just under a $1 each. They're cute as can
be and have a very small transformer and a single stage transistor
driver circuit that fits inside of a slightly over-sized usb enclosure.
Well, they're made in China and sold as 'unbranded' units-need I say
more? Avoid this thing like the plague!!!
I just finished reverse engineering one (including an LTSpice
simulation). The transformer is supposed to produce around 70 volts,
which is then applied to a 2 stage Cockcroft-Walton voltage multiplier
to produce -200 volts at the carbon fiber emitter.
There are serious flaws in the design-I mean VERY SERIOUS. I'd like to
summarize my findings and make the schematic, the LTSpice .asc file and
the schematic some place online so that the public can find the
information with a search engine and download the summary.
If anyone wants to have a look at them, go to
http://www.ebay.com/itm/USB-Fresh-Air-Cleaner-Lonic-USB-Air-Purifier-Lonizer-Tablet-PC-Laptop-Computer-/263169423819
Does anyone have an idea where I can post files anonymously for the
purpose of getting the word out regarding these items? Send me a sign::>
TY
W1ABA
I became interested in low power usb ionic air fresheners as an
alternative to the very expensive USB Killer. The ionic air fresheners
sell from $0.19 to ~$2 at that online auction place. I think the
highest I ever paid for one is just under a $1 each. They're cute as can
be and have a very small transformer and a single stage transistor
driver circuit that fits inside of a slightly over-sized usb enclosure.
Well, they're made in China and sold as 'unbranded' units-need I say
more? Avoid this thing like the plague!!!
I just finished reverse engineering one (including an LTSpice
simulation). The transformer is supposed to produce around 70 volts,
which is then applied to a 2 stage Cockcroft-Walton voltage multiplier
to produce -200 volts at the carbon fiber emitter.
There are serious flaws in the design-I mean VERY SERIOUS. I'd like to
summarize my findings and make the schematic, the LTSpice .asc file and
the schematic some place online so that the public can find the
information with a search engine and download the summary.
If anyone wants to have a look at them, go to
http://www.ebay.com/itm/USB-Fresh-Air-Cleaner-Lonic-USB-Air-Purifier-Lonizer-Tablet-PC-Laptop-Computer-/263169423819
Does anyone have an idea where I can post files anonymously for the
purpose of getting the word out regarding these items? Send me a sign::>
TY
W1ABA
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View/change your membership options at
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