Re: Could be useful project, anyone tried this?

["Gary" <questuk1@xxxxxxxxxxx>]

Hi Dave,

I would be interested in the pictures and the schematic.

Also which model in the argos catalogue is it?

Regards=20


Gary


--- In ukha_d@xxxxxxx, "David Ward" <d.ward@...> wrote:
>
> I use a cheap Argos =A38 doorbell to start our shower pump remotely.
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> Our shower head is at almost the same height as our water tank so
the flow switches on the shower pump don't always start reliably.  I
have a wireless doorbell transmitter hidden in the wall cavity behind
the shower controls which is triggered by a reed switch and a magnet
in the shower control knob itself.
> The receiver sits next to the shower pump and it's modified output
drives an old relay coil which is cable-tied to the flow sensor reed
switch housing.
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> The cheapest wire free doorbells that Argos and Wickes sell have a
PCB that has spaces for extra components,  by changing a link and
moving the Amplifier transistor you end up with a receiver that gives
an open collector output pulse of 5 seconds or so every time the bell
button is pressed.
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> For our shower start circuit I added a simple one shot circuit RC
and Schmitt inverter circuit to save transmitter battery power as the
unit takes power all the time that the button is pressed.  It's only
been running now for 6 weeks, so I can't say how long the transmitter
battery lasts.=20
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> If anyone is interested I'll see If I have pictures and the schematic.
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> Dave
>   _____=20=20
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> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On
Behalf Of Gary
> Sent: 25 November 2006 14:40
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Could be useful project, anyone tried this?
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> http://www.electronicsinschools.org/page.php?m=3D106&ps=3D103&p=3D414
<http://www.electronicsinschools.org/page.php?m=3D106&ps=3D103&p=3D414>=20
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> Hi,
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> I was thinking about interfacing a doorbell to my PC so that i can
> play any sound. The price of a simple PCB type TX unit is about
=A38.=20
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> You can by the freidland bell push, about =A38 and these with come
case,
> button, and fully assembled etc, and it has lots of code combinations!
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> So could be used for lots of diffent tasks where a simple closed
> contact is required.
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> Anyone know how to interface it or tried something like it, the
> website already has the timings, they seem a bit like X10?
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> Regards=20
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> Gary
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> [Non-text portions of this message have been removed]
>




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