Bell rings when garden gate opens?

Timothy Murphy

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Jun 17, 2010, 1:29:28 PM6/17/10

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My small city garden has a standard Victorian railing
on the street, with the gate as part of the railing.
A few days ago someone came in the garden and stole
a (locked) bike.

This made me wonder if there is any simple way
to make a bell ring when the gate is opened?

Also, is there a standard spring which will
keep the gate closed?

--
Timothy Murphy
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

d...@gglz.com

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Jun 17, 2010, 2:11:52 PM6/17/10

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> This made me wonder if there is any simple way
> to make a bell ring when the gate is opened?

Attach a bell to it.

You know - one of those bell shaped things - with the clanger bit
swinging about inside.

Jim K

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Jun 17, 2010, 2:22:40 PM6/17/10

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er...and remain within earshot at all times? sat on the bike maybe?

Jim K

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Jun 17, 2010, 2:24:15 PM6/17/10

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ISTR adam was rigging up something similar very recently - google on
uk.d-i-y for "reed switch changeover" and see if it comes up if not
ask Adam (ARWadsworth) for an update?

Cheers
Jim K

Owain

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Jun 17, 2010, 2:33:00 PM6/17/10

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On 17 June, 18:29, Timothy Murphy wrote:
> My small city garden has a standard Victorian railing
> on the street, with the gate as part of the railing.
> A few days ago someone came in the garden and stole
> a (locked) bike.
> This made me wonder if there is any simple way
> to make a bell ring when the gate is opened?

One of these
http://www.alarmworld.co.uk/intruder/door-contacts/surface-contacts/garage-door/roller-shutter-alarm-contact/prod_56.html

wired up to an appropriate alarm inside. Something like this might
suit
http://www.maplin.co.uk/Module.aspx?ModuleNo=30579

but you'd have to check that it's reed switch operates as open circuit
to activate, as that's how the alarm contact will probably work.

> Also, is there a standard spring which will
> keep the gate closed?

http://www.screwfix.com/prods/17251/Ironmongery/Gate-Fittings/Gate-Fittings/Gate-Spring-Black-200mm

Owain

zaax

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Jun 17, 2010, 2:42:58 PM6/17/10

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Timothy Murphy wrote:

> My small city garden has a standard Victorian railing
> on the street, with the gate as part of the railing.
> A few days ago someone came in the garden and stole
> a (locked) bike.
>
> This made me wonder if there is any simple way
> to make a bell ring when the gate is opened?
>
> Also, is there a standard spring which will
> keep the gate closed?

yes micro-switch and a bell and a battery

--
---
zaax
Frustration casues accidents: allow faster traffic to overtake.

zaax

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Jun 17, 2010, 2:41:58 PM6/17/10

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Timothy Murphy wrote:

> My small city garden has a standard Victorian railing
> on the street, with the gate as part of the railing.
> A few days ago someone came in the garden and stole
> a (locked) bike.
>
> This made me wonder if there is any simple way
> to make a bell ring when the gate is opened?
>
> Also, is there a standard spring which will
> keep the gate closed?

yes micro-switch and a bell and a battery

Mungo "Two Sheds" Toadfoot

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Jun 17, 2010, 2:50:32 PM6/17/10

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"zaax" <zaax_gua...@yahoo.com> wrote in message
news:S0uSn.35978$OF3.17205@hurricane...

> Timothy Murphy wrote:
>
>> My small city garden has a standard Victorian railing
>> on the street, with the gate as part of the railing.
>> A few days ago someone came in the garden and stole
>> a (locked) bike.
>>
>> This made me wonder if there is any simple way
>> to make a bell ring when the gate is opened?
>>
>> Also, is there a standard spring which will
>> keep the gate closed?
>
> yes micro-switch and a bell and a battery
>

Why two?

Siu

ARWadsworth

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Jun 17, 2010, 2:52:10 PM6/17/10

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"Jim K" <jk98...@googlemail.com> wrote in message
news:aad7af71-50f6-4da5...@u7g2000yqm.googlegroups.com...

Yep.

I cannot finish the job as the lucky bastard has gone to South Africa to
watch England.

Adam

Jim K

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Jun 17, 2010, 3:21:55 PM6/17/10

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On Jun 17, 7:52 pm, "ARWadsworth" <adamwadswo...@blueyonder.co.uk>
wrote:
> "Jim K" <jk989...@googlemail.com> wrote in message

be back soon.......;>)

Jim K

NT

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Jun 17, 2010, 3:27:16 PM6/17/10

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On Jun 17, 6:29 pm, Timothy Murphy <gayle...@eircom.net> wrote:

> My small city garden has a standard Victorian railing
> on the street, with the gate as part of the railing.
> A few days ago someone came in the garden and stole
> a (locked) bike.
>
> This made me wonder if there is any simple way
> to make a bell ring when the gate is opened?
>
> Also, is there a standard spring which will
> keep the gate closed?

If you can arrange a switch to close as the gate opens, connect it
from battery/wallwart to bell via a big capacitor (eg 4700uF) so the
bell only gets a pulse of power when the gate opens.

NT

ARWadsworth

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Jun 17, 2010, 4:04:02 PM6/17/10

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"Jim K" <jk98...@googlemail.com> wrote in message

news:9b28b608-a1de-4635...@w12g2000yqj.googlegroups.com...

Not till the semifinals.

Adam

ARWadsworth

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Jun 17, 2010, 4:06:55 PM6/17/10

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"ARWadsworth" <adamwa...@blueyonder.co.uk> wrote in message
news:WcvSn.43231$nz1.34780@hurricane...

We are not French after all. Adam

newshound

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Jun 17, 2010, 5:09:28 PM6/17/10

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"Timothy Murphy" <gayl...@eircom.net> wrote in message
news:hvdm1v$nuv$1...@news.eternal-september.org...

> My small city garden has a standard Victorian railing
> on the street, with the gate as part of the railing.
> A few days ago someone came in the garden and stole
> a (locked) bike.
>
> This made me wonder if there is any simple way
> to make a bell ring when the gate is opened?
>

Not exactly the same, but I have an external PIR sensor on the garden path
which wirelessly triggers a battery powered doorbell which I keep with me if
I am in the garden, workshop, etc. That way I can hear visitors if I am out
of range of the rather feeble doorbell. The PIR is wired up to an old
wall-wart to save faffing around with batteries. eBay for PIR bell. Might be
useful if you don't have convenient wiring runs to the gate (like me). But
it can get triggered by birds occasionally

zaax

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Jun 17, 2010, 5:47:56 PM6/17/10

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Timothy Murphy wrote:

> My small city garden has a standard Victorian railing
> on the street, with the gate as part of the railing.
> A few days ago someone came in the garden and stole
> a (locked) bike.
>
> This made me wonder if there is any simple way
> to make a bell ring when the gate is opened?
>
> Also, is there a standard spring which will
> keep the gate closed?

yes micro-switch and a bell and a battery

--

zaax

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Jun 17, 2010, 5:52:01 PM6/17/10

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Because my gate bell played three blind mice and then I added another
bell to play God Save the Queen. Then I used the timers for another
project.

Frank Erskine

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Jun 17, 2010, 7:18:10 PM6/17/10

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On Thu, 17 Jun 2010 18:29:28 +0100, Timothy Murphy
<gayl...@eircom.net> wrote:

>My small city garden has a standard Victorian railing
>on the street, with the gate as part of the railing.
>A few days ago someone came in the garden and stole
>a (locked) bike.
>
>This made me wonder if there is any simple way
>to make a bell ring when the gate is opened?

Fit a padlock or something similar to the gate, and a nelectric bell
for bona fide callers.

If you do want a "gate-operated" bell, I'd suggest a reed switch and
magnet rather than a microswitch from the point of view of weathering.
Hamlin do enclosed-type reed switches (e.g 59065-020) and associated
magnets; it should be trivial to knock up a suitable circuit (well,
sub O-level) to ring a bell as you wish.

>
>Also, is there a standard spring which will
>keep the gate closed?

Yes. A standard torsion gate spring is easy to fit (and only a bit
fiddlier to adjust!)

--
Frank Erskine

geoff

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Jun 17, 2010, 7:44:02 PM6/17/10

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In message <7j9l16h420c37pl94...@4ax.com>, Frank Erskine
<frank....@btinternet.com> writes

Just think of the useful energy in that

--
geoff

dennis@home

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Jun 18, 2010, 2:55:32 AM6/18/10

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"Frank Erskine" <frank....@btinternet.com> wrote in message
news:7j9l16h420c37pl94...@4ax.com...

Far too simple..

Crank connected to a hydraulic cylinder..
cylinder to a hydraulic motor..
output to a receiver.
Pre pressurise the receiver to keep the gate closed.
Connect genny to motor..
connect bell to genny.

Mungo "Two Sheds" Toadfoot

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Jun 20, 2010, 7:52:40 AM6/20/10

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"zaax" <zaax_gua...@yahoo.com> wrote in message

news:5OwSn.66489$D81.16630@hurricane...

> Mungo "Two Sheds" Toadfoot wrote:
>

>> Why two?

>>
>
> Because my gate bell played three blind mice and then I added another
> bell to play God Save the Queen. Then I used the timers for another
> project.
>

:o)