Re: Of Mice and HV (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Tue, 18 Apr 2006 21:04:58 +0200
From: Finn Hammer <f-h@xxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Of Mice and HV (fwd)

Another work around the lack of conductive path, due to fur:

Lure vermin into metal can, then shrink can.

Cheers, Finn Hammer

High Voltage list wrote:

>Original poster: Steven Roys <sroys@xxxxxxxxxx>
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>---------- Forwarded message ----------
>Date: Tue, 18 Apr 2006 11:29:05 -0400
>From: "Mccauley, Daniel H" <daniel.h.mccauley@xxxxxxxx>
>To: High Voltage list <hvlist@xxxxxxxxxx>
>Subject: RE: Of Mice and HV (fwd)
>
>I agree.  Just zapping a mouse with a high voltage arc probably isn't
>going to do much.  You need to establish a good path for current to flow
>through the vital portion of the mouse to be effective.  For animals
>with fur, this is not so trivial.
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>You are probably better off with an old fashion mouse trap!  Remember
>the old adage about building the better mousetrap.   You just can't do
>it!
>
>Dan
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>HI Matthew,
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>As dangerous electricity is, killing in a reliable way with it is 
>really hard; read about electric chair execution, they used a lot of 
>power with good contact ( they used salt saturated water pad ) some 
>time they need to applied the tension many time to finally kill. I also 
>know a man who was strike by a power ( 14.4KV ) line, he loose an arm, 
>a leg and have internal organ damage but he survived...
>
>Cheers,
>
>Luc
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>On 13-Apr-06, at 1:07 PM, High Voltage list wrote:
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>>Original poster: Steven Roys <sroys@xxxxxxxxxx>
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>>---------- Forwarded message ----------
>>Date: Tue, 11 Apr 2006 07:20:03 +0930
>>From: Matthew Smith <matt@xxxxxxxxxx>
>>To: High Voltage list <hvlist@xxxxxxxxxx>
>>Subject: Of Mice and HV
>>
>>Greetings All
>>
>>CONTENT WARNING: If you are distressed by nasty things happening to
>>vermin (small furry creatures to those not infested with them), please
>>do not read any further.
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>>They don't make 'em like they used to!  Our house, completed just over
>>two years ago (actually not completed, but that's another story!)
>>appears to have been built to accommodate rodents just as comfortably 
>>as
>>humans.
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>>Snap traps have proved anything but reliable (bait gone, trap still 
>>set)
>>and when they do operate, frequently kill in an unclean manner.
>>
>>So, I have decided to build an electric mousetrap.  Idea is simple:
>>mouse enters trap and has to pass through a narrow gap between two
>>aluminium plates arranged in a V.  (Mouse enters the larger part of
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>the
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>>V.)  One plate is fixed, the other against light spring tension so
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>that
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>>the subject has to push between the two plates to get to the bait.
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>>Plates are connected to a charged capacitor.  Charging will be from a
>>PWM supply driven by a microcontroller which stops when capacitor
>>voltage reaches an upper threshold and starts again once it has
>>discharged (mostly through the feedback voltage divider) down to a
>>minimum voltage.  The idea being that this device is battery-operated
>>and tries to save power.
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>>Does anyone have any idea what minimum voltage I would need to apply
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>to
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>>guarantee fatal fibrillation?
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>>I had considered powering from a disposable camera supply (no
>>microcontroller - simply pulse the start button when the neon goes
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>out)
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>>but, whilst photoflash capacitors can give us a ghastly bite, is the
>>300V or so enough to take out a mouse in its insulating fur coat?
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>I've
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>>serviced equipment before where mice have gone in a mains (240V) PSU 
>>and
>>have blown the fuses but am still unsure about the certainty of a
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>clean
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>>kill.
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>>Once I've got this idea working, I want to motorise it so that the
>>defunct rodent can be cleared from the plates and the trap be readied
>>for another "client".
>>
>>Cheers
>>
>>M
>>
>>-- 
>>Matthew Smith
>>IT Consultancy & Web Application Development
>>http://www.kbc.net.au
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