Bug zapper not zapping

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How do you test the secondary coil (4KVA 6W).

Air gapped coils iron core loop and the secondary is well coated in  
plastic covering, but easy access to the output.

Basically limited to some modern "electronic" multimeters.

T.I.A.

Re: Bug zapper not zapping

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I found those blue light bug zappers to be very good at killing
harmless moths and useless for mosquitos.

Re: Bug zapper not zapping


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The best thing for moths is a computer fan strapped to the flex on the  
lightbulb pendant.

Trouble is - wasps just bounce off, and get very pissed off.  


Re: Bug zapper not zapping
On 12-Dec-15 3:32 AM, Ian Field wrote:
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and pissed off wasps come back for seconds and thirds.


Re: Bug zapper not zapping
On Sun, 13 Dec 2015 16:15:42 +0800

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Once I've read about a device that _did_ work.

It was emitting CO2 for some time, convincing the mosquitoes there was
some breathing animal, then switched on an infra-red lamp, that could
be reached through some large hole in the pot from where also the CO2
emanated, to signal a mammal, and of course the mosquitoes would have
to pass an electrocution grid which got rid of them permanently.

It seemed to be very effective.


joe


Re: Bug zapper not zapping
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I looked into them online a while ago. It seemed that different species
have different success rates with such devices, and nobody knows the
exact method mosquitoes use for tracking their prey. There was also
another sort of trap that involved some sort of combustion that had
to be maintained.

There was a comparison between a few of the CO2 devices online,
somewhere. I don't think it was all that scientific though.

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Re: Bug zapper not zapping
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burn a fuel (eg: LPG) and you can produce both CO2 and infrared.

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Re: Bug zapper not zapping


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Many years ago I used to use a butane refill can and a lighter as an  
improvised flame thrower for dealing with flying insects.

My cassette player had no flap on the front, and while hunting down a  
persistent fly I flamed the deck and ruined a favourite tape.

AFAIK: the UK doesn't have any deadly spiders, just a few that can give a  
painful nip - in my flat, spiders are allowed to get on with the business of  
eating the things I'd less like to have around.  


Re: Bug zapper not zapping
On Mon, 14 Dec 2015 18:14:23 -0000

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}snip{

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That one most certainly would _not_ get through the safety
certification procedure. :)

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Re: Bug zapper not zapping
On 14 Dec 2015 10:49:33 GMT

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Right, but I wonder how much effort would have to be put into obtaining  
safety certification.

joe


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Re: Bug zapper not zapping
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Presumably no more than anything else that burns LPG. A bigger problem
would be the fuel cost, and that unattended continually running fires
need to be designed (and used) well to avoid setting other things
alight.

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Re: Bug zapper not zapping


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I'm sort of in favour of the aimed laser approach. Apparently the beam from  
a DVD LD can set off match heads.

There's a few bugs to work out (excuse the pun) like what to use as a lure,  
and how to trigger the LD when the critter is in the focal point etc.  


Re: Bug zapper not zapping
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Upsize the laser in one of the laser lightshow devices that use a mirror
galvanometer to deflect the beam in any X-Y position.

Detecting the position of the mozzie would be the hard part. The most
distinctive emmission from a mozzie would probably be its noise when flying,
so if you set up some microphones and filter the input for the right
frequency, maybe you could triangulate the approximate position of the
mozzie and move the laser in a path around that location (circle maybe) that
makes it likely that the mozzie will be hit. The laser light show things can
move extremely fast, so keeping up wouldn't be a problem. Dealing with echos
and other influences on the sound detection would be the challenge though.

Unfortunately there's the fact that the laser beam will be burning marks into
everything in the room, including people, and potentially starting fires too.
But hey, after a few nights of itching and aerial bombardment I think most
would agree it's a price worth paying.

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Re: Bug zapper not zapping


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My idea is a much simpler fixed LD - but that requires a pin point lure so  
the insect only settles where the beam goes.

On that basis a break beam opto sensor would be entirely sufficient.  


Re: Bug zapper not zapping

How do you test the secondary coil (4KVA 6W).

Air gapped coils iron core loop and the secondary is well coated in
plastic covering, but easy access to the output.

Basically limited to some modern "electronic" multimeters.

T.I.A.

Maybe not measuring but can you take the output to a spark gap  and see what  
eventuates ??


Re: Bug zapper not zapping
On 11/12/2015 2:32 PM, news13 wrote:
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Measure resistance of the coil(s) and between windings, check input  
voltage and if there is a cap on the output replace it?

I kind of depends on what circuit it is, perhaps if you found one online  
that corresponds with what you have and link to it it would be helpful.







Re: Bug zapper not zapping
On Sat, 12 Dec 2015 07:25:21 +0800, Clocky wrote:


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Just two wires from coil to grids.
If there is any device, it is very small under the covering.

I should be able to find a string of resistors as suggested.
That cheap bulk pack for the junk box has finally come in handy.
Lol, I might even be able to find the two ?M? ones I purchased for 2/' as  
a kid when I turn up at the repair guys parts place wanting a "resistor".
I was starting my own electronics kit.





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