Bug Zapper Retrofit

ian field

Joined Oct 27, 2012
6,536
You won't aquire a tan from UVA;)

FWIW: Here's a (qualitative) 'breakdown' as it were (by decreasing wavelength / increasing energy)

UVA -- Special effects, some forensic applications
UVB -- Tanning and other dermatological applications
UVC --- Germicidal lamps, UV-EPROM erasers...
UVD --- Ozone generators
EUV --- Low energy radiography (e.g. crystallography, mammography, etc..)
UEUV --- 'Standard' medical diagnostic and radiotherapy 'X-Rays'

Best regards
HP
UVA was talked about sometimes at the sunbed manufacturer I worked for.

It must have stuck in my mind because of that.

Maybe a customer got overdone and went to trading standards with accusations of the wrong kind of UV.

Sunbed sales were declining rapidly and the line was being wound down. My main responsibilities were with the faradic muscle excercisers and a gizmo for pulling out hair follicles with tweezers fed with RF - Oh... and an iontophoresis gadget for drawing out cellulite.
 
With only 3 primary colours - the only opposites can be with secondary colours, the primary are; red, green & blue. the secondary are; yellow, cyan & magenta.

Since blue and yellow combine to make white, I'd assume that blue and yellow are a pair of opposites.
'Opposites', in this context, makes no sens to me --- but then graphic art is not my forté

That said, it is (was?) my understanding that production of 'white' required a combination of all three primary colors? --- Based upon vague recollection of 'TV color temp adjustment' away back in, can it be? -- the Precambrian era! :eek:;):)

Best regards
HP
 

ian field

Joined Oct 27, 2012
6,536
'Opposites', in this context, makes no sens to me --- but then graphic art is not my forté

That said, it is (was?) my understanding that production of 'white' required a combination of all three primary colors? --- Based upon vague recollection of 'TV color temp adjustment' away back in, can it be? -- the Precambrian era! :eek:;):)

Best regards
HP
Yellow being a secondary colour is made up of red and green - add blue and that's all 3.
 
My main responsibilities were with the faradic muscle excercisers and a gizmo for pulling out hair follicles with tweezers fed with RF - Oh... and an iontophoresis gadget for drawing out cellulite.
Was your work attire comprised, per chance, of a cleated leather suit and a cat-o-nine tails?;););)

OBTW --- Please no offense intended! -- I can't help it! I'm from the US, and, perhaps, more to the point, Duluth:p

Best regards
HP:)
 

ian field

Joined Oct 27, 2012
6,536
Was your work attire comprised, per chance, of a cleated leather suit and a cat-o-nine tails?;););)

OBTW --- Please no offense intended! -- I can't help it! I'm from the US, and, perhaps, more to the point, Duluth:p

Best regards
HP:)
There was a strong suspicion that most of the customers were so attired.

The company was originally involved in display lighting, I did the illuminated Argos pay here sign with a flashing light on top so the checkout staff could summon a supervisor, I think the sunbeds were probably a sideline to keep the money trickling in, and that apparently drifted into various cosmetic devices.

One of my tasks was to reverse engineer a competitor's product - that was the RF tweezers doodad. In an attempt to minimise any legal rammifications, I made some significant design changes and improvements on the original.

As a design engineer, I wasn't too happy about sometimes spending weeks at a time repackaging returns from mail order clubs, I did a few new designs for them and improved a few old ones then moved on.
 
One of my tasks was to reverse engineer a competitor's product - that was the RF tweezers doodad. In an attempt to minimise any legal rammifications
Indeed! all so-called 'electrolysis' equipment I've encountered falls short of, and, in fact, is at wide variance with, standards applicable to proper ES equipment... It seems 'electrolysis' in this context (as opposed to 'electroepilation') is little more than a 'surgical variant' of patent medicine...:rolleyes:

Best regards
HP:)
 

ian field

Joined Oct 27, 2012
6,536
Indeed! all so-called 'electrolysis' equipment I've encountered falls short of, and, in fact, is at wide variance with, standards applicable to proper ES equipment... It seems 'electrolysis' in this context (as opposed to 'electroepilation') is little more than a 'surgical variant' of patent medicine...:rolleyes:

Best regards
HP:)
I doubted the boss's morals - but bit my tongue and collected my pay packet at the end of each week.

There were rumours he was also bringing in women from an E. European country for an escort agency.

When I moved on, my PAYE contributions paperwork wasn't in order.
 

ian field

Joined Oct 27, 2012
6,536
'Opposites', in this context, makes no sens to me --- but then graphic art is not my forté

That said, it is (was?) my understanding that production of 'white' required a combination of all three primary colors? --- Based upon vague recollection of 'TV color temp adjustment' away back in, can it be? -- the Precambrian era! :eek:;):)

Best regards
HP
A PS: to my other post - the original white LEDs were actually blue with a yellow phosphor - the manufacturers discovered they got more light if they used as little phosphor as they could get away with, that's why older white LEDs are annoyingly blue.

AFAIK: they've switched to using UV LEDs with white phosphor, which gives more light anyway.
 

ian field

Joined Oct 27, 2012
6,536
I see the replacement Zapper lamps on sale are listed as UV/Blacklight, no other spec visible.
Max.
By the time I've not got too much else going on, the price of UV LEDs might have dropped a bit further - its allways possible I might eventually get around to trying some and see if they attract flies.

But after buying stock of spare tubes that only last a few weeks - I've sort of got used to the idea of taping insect screens around the edges of the windows.
 

djsfantasi

Joined Apr 11, 2010
9,156
'Opposites', in this context, makes no sens to me --- but then graphic art is not my forté

That said, it is (was?) my understanding that production of 'white' required a combination of all three primary colors? --- Based upon vague recollection of 'TV color temp adjustment' away back in, can it be? -- the Precambrian era! :eek:;):)

Best regards
HP
Colors can be arranged in a wheel. Hence, colors opposite each other on a wheel mix to make (in light or additive mixing) white or (in pigments or subtractive mixing) black. The image below shows the additive mixing of light.
 

ian field

Joined Oct 27, 2012
6,536
Colors can be arranged in a wheel. Hence, colors opposite each other on a wheel mix to make (in light or additive mixing) white or (in pigments or subtractive mixing) black. The image below shows the additive mixing of light.
[\QUOTE].


Worth searching; "Chromaticity triangle" - some text books present it complete with wavelengths.
 
By the time I've not got too much else going on, the price of UV LEDs might have dropped a bit further - its allways possible I might eventually get around to trying some and see if they attract flies.
I don't believe 'common flies' (i.e. musca domestica) nor their close 'relatives' (e.g. 'biting' flies, mosquitoes, etc...) are phototropic --- That said a good test of the LED's efficacy in this regard may be conducted via operation of the lamps after nightfall using a white florescent as a 'control' (well, ok, not actually a 'control' in the strict laboratory sense of the term but I think you 'get me';)) -- I would expect both to draw veritable 'hordes' of phototropic species (depending, of course, upon your location)

As a side note please be advised that even UVA is significantly attenuated by glass and most polymers...

I see the replacement Zapper lamps on sale are listed as UV/Blacklight, no other spec visible.
Max.
Indeed! For whatever reason all lamps productive of significant, intended, spectra in the 400nm region are dubbed 'blacklights' The principal 'varietal' distinction being the extent to which visible radiation is attenuated --- Go figure... :confused:

Best regards
HP
 
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ian field

Joined Oct 27, 2012
6,536
I don't believe 'common flies' (i.e. musca domestica) nor their close 'relatives' (e.g. 'biting' flies, mosquitoes, etc...) are phototropic --- That said a good test of the LED's efficacy in this regard may be conducted via operation of the lamps after nightfall using a white florescent as a 'control' (well, ok, not actually a 'control' in the strict laboratory sense of the term but I think you 'get me';)) -- I would expect both to draw veritable 'hordes' of phototropic species (depending, of course, upon your location)
I really don't like moths and crane flies - they pretty much swarm if you turn a light on with the window open.

It was always that way with filament bulbs and no different with CFLs.

One hot summer night something as big as a medium size bat came in the kitchen window and made a bee-line into the living room.

At that particular moment I just happened to have a bottle of spray cleaner in my hand - whatever it was succesfully navigated the shortest possible route back the way it came in.
 
One hot summer night something as big as a medium size bat came in the kitchen window and made a bee-line into the living room.
Sounds like a 'Cecropia Moth' --- If you think the mature insect is revolting - you ought to see its larval stage - Ewwwwwe!:eek:

PS FWIW I'm not an entomologist! -- Where I live one get's to know 'bugs' up close and personal -- like it or not:mad:

Best regards
HP:)
 
For all I know it actually was a bat, but I was surpised that a barely sighted animal that relies on sonar could navigate that quickly and that accurately, pretty much back the exact way it came.
If it was moving swiftly it probably was a bat -- based upon 'unscheduled' observation they are indeed deft navigators - then too they follow their feed (which being insects -- with the exception of the um... 'enantiomorphically challenged' which can be a pain in the neck!;););))

Best regards
HP
 
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