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Science Forum Index » Electronics Forum » Capacitor size to repel birds?
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| Guest |
 Posted: Fri Aug 17, 2007 3:35 pm |
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I'm looking to build an electric bird repeller using HO scale railroad
tracks. What size capacitor would be appropriate to give a sufficient
shock to a bird to repel it, without hurting it?
Thanks in advance. |
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| Robert Baer |
| Posted: Sat Aug 18, 2007 2:07 am |
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hym3n_h0l0c4$t@salmahayeksknockers.edu wrote:
Quote: I'm looking to build an electric bird repeller using HO scale railroad
tracks. What size capacitor would be appropriate to give a sufficient
shock to a bird to repel it, without hurting it?
Thanks in advance.
First, design a trebucket (sp?) launcher and yse capacitors about 1/4
to 1/2 inch insize; a rock would be better. |
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| no_one |
| Posted: Sat Aug 18, 2007 9:47 am |
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"Robert Baer" <robertbaer@copper.net> wrote in message
news:46c667d4_2@newsfeed.slurp.net...
Quote: hym3n_h0l0c4$t@salmahayeksknockers.edu wrote:
I'm looking to build an electric bird repeller using HO scale railroad
tracks. What size capacitor would be appropriate to give a sufficient
shock to a bird to repel it, without hurting it?
Thanks in advance.
First, design a trebucket (sp?) launcher and yse capacitors about 1/4 to
1/2 inch insize; a rock would be better.
its actually trebuchet |
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| David Gravereaux |
| Posted: Mon Aug 20, 2007 1:37 pm |
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no_one wrote:
Quote: "Robert Baer" <robertbaer@copper.net> wrote in message
news:46c667d4_2@newsfeed.slurp.net...
hym3n_h0l0c4$t@salmahayeksknockers.edu wrote:
I'm looking to build an electric bird repeller using HO scale railroad
tracks. What size capacitor would be appropriate to give a sufficient
shock to a bird to repel it, without hurting it?
Thanks in advance.
First, design a trebucket (sp?) launcher and yse capacitors about 1/4 to
1/2 inch insize; a rock would be better.
its actually trebuchet
Try a cat instead.
--
"That's the problem with science. You've got a bunch of empiricists trying
to describe things of unimaginable wonder." -Calvin |
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| Jasen Betts |
| Posted: Sat Sep 01, 2007 6:09 am |
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On 2007-08-20, David Gravereaux <davygrvy@pobox.com> wrote:
Quote: This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
and this was approved for usenet?
Quote: Content-Transfer-Encoding: quoted-printable
yuck!
Quote: no_one wrote:
"Robert Baer" <robertbaer@copper.net> wrote in message=20
news:46c667d4_2@newsfeed.slurp.net...
hym3n_h0l0c4$t@salmahayeksknockers.edu wrote:
I'm looking to build an electric bird repeller using HO scale railroa=
d
tracks. What size capacitor would be appropriate to give a sufficie=
nt
shock to a bird to repel it, without hurting it?
Thanks in advance.
First, design a trebucket (sp?) launcher and yse capacitors about 1/=
4 to=20
1/2 inch insize; a rock would be better.
=20
its actually trebuchet=20
=20
=20
Try a cat instead.
cat-a-pult |
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| Karl Uppiano |
| Posted: Sat Sep 01, 2007 3:38 pm |
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<hym3n_h0l0c4$t@salmahayeksknockers.edu> wrote in message
news:FEnxi.98175$tB5.47294@edtnps90...
Quote: I'm looking to build an electric bird repeller using HO scale railroad
tracks. What size capacitor would be appropriate to give a sufficient
shock to a bird to repel it, without hurting it?
Thanks in advance.
There is nothing unique about a capacitor that makes it suited for shocking
things. A capacitor merely stores energy. You can store energy in a battery,
you can get the energy from the power utility, you can generate it with a
windmill.
If I were you, I would use an electric fence charger/energizer. Just connect
the terminals to the track rails and plug it in. It is designed to inflict a
painful but harmless electric shock. I have been "bitten" by electric fences
on many occasions. It is not something I would do voluntarily.
http://electric-fence.com/Shop/electric-fence-chargers-and-energizers.asp
The voltage on these devices might be a bit high, causing the rails to arc.
You might want to investigate how electric fences are typically installed,
and use similar construction, with the same kind of wire and insulators. |
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| David Gravereaux |
| Posted: Mon Sep 03, 2007 5:15 pm |
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Jasen Betts wrote:
Quote: On 2007-08-20, David Gravereaux <davygrvy@pobox.com> wrote:
This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
and this was approved for usenet?
Content-Transfer-Encoding: quoted-printable
yuck!
User-Agent: slrn/0.9.8.1pl1 (Debian)
You could ask the authors to make your nntp client RFC compliant like it
should already be. rfc3156 is like 6 years old! |
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| David Gravereaux |
| Posted: Mon Sep 03, 2007 5:29 pm |
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Guest
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Direct from rfc1847:
"
A MIME agent that includes support for this framework will be able to
recognize a security multipart body part and to identify its
protected data and control information body parts. If the value of
the protocol parameter is unrecognized the MIME agent will not be
able to process the security multipart. However, a MIME agent may
continue to process any other body parts that may be present.
"
The last sentence is the meaningful one. Please pass the bug onto the slrn folks. |
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