Building a pool lap timer
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Building a pool lap timer

 
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shez
Guest
Posted: Fri Nov 04, 2005 9:35 am    Post subject: Building a pool lap timer Reply with quote
Hey
I wanna challenge myself and make something that allows be to monitor
my laps in the pool via a computer.
I was think of something like a waterproof pressure mat hanging in the
water, connected to a USB or Serial port connected to the computer.

Any help would be great

Thanks

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David
Guest
Posted: Fri Nov 04, 2005 9:35 am    Post subject: Re: Building a pool lap timer Reply with quote
A Recent Silicaon Chip had just such a project
Dave

"shez" <adrianscerri@gmail.com> wrote in message
news:1131089831.399037.137090@g14g2000cwa.googlegroups.com...
Quote:
Hey
I wanna challenge myself and make something that allows be to monitor
my laps in the pool via a computer.
I was think of something like a waterproof pressure mat hanging in the
water, connected to a USB or Serial port connected to the computer.

Any help would be great

Thanks
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shez
Guest
Posted: Fri Nov 04, 2005 9:35 am    Post subject: Re: Building a pool lap timer Reply with quote
David wrote:
Quote:
A Recent Silicaon Chip had just such a project
Dave


Thanks
Where can I find this project

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Rheilly Phoull
Guest
Posted: Fri Nov 04, 2005 3:57 pm    Post subject: Re: Building a pool lap timer Reply with quote
"shez" <adrianscerri@gmail.com> wrote in message
news:1131091688.106902.16010@g43g2000cwa.googlegroups.com...
Quote:

David wrote:
A Recent Silicaon Chip had just such a project
Dave


Thanks
Where can I find this project


www.siliconchip.com.au suprisingly enough!!

--
Regards ......... Rheilly Phoull
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Jasen Betts
Guest
Posted: Sun Nov 06, 2005 3:25 pm    Post subject: Re: Building a pool lap timer Reply with quote
On 2005-11-04, shez <adrianscerri@gmail.com> wrote:
Quote:
Hey
I wanna challenge myself and make something that allows be to monitor
my laps in the pool via a computer.

You want to use a mains powered appliance in the vacinity of a swimming
pool? ensure that the computer is correctly earthed and/or use an
isolating transformer or RCD ....

Quote:
I was think of something like a waterproof pressure mat hanging in the
water, connected to a USB or Serial port connected to the computer.

Any help would be great

maybe replace one of the buttons of an old mouse with wires leading to the
pressure pad.

from the safety standpoint and to keep the PC away from corrosive chemicals
it may be better tu use an air-filled pressure pad connected by a long hose
to a remotely located pressure switch connected to a old mouse (or directly
to pins used for the fire button on the joystick port etc...).

suitable pressure switches can be salvaged from many models of washing
machines (used in the water level detector)

as for the pressure pad, maybe a wheelbarrow inner-tube between two sheets
of stiff plastic (acrylic/lexan/fibreglass) etc

(the pressure switch could probably be made this way too)

Bye.
Jasen
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shez
Guest
Posted: Sun Nov 13, 2005 1:35 am    Post subject: Re: Building a pool lap timer Reply with quote
Thanks very much
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Woody Brison
Guest
Posted: Thu Nov 17, 2005 1:35 am    Post subject: Re: Building a pool lap timer Reply with quote
Jasen Betts wrote:
Quote:
from the safety standpoint and to keep the PC away from corrosive chemicals
it may be better tu use an air-filled pressure pad connected by a long hose
to a remotely located pressure switch connected to a old mouse (or directly
to pins used for the fire button on the joystick port etc...).

So can you pop it a couple of times while the coach is looking
elsewhere? or will repeat hits within say 30 sec. be locked out
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Jasen Betts
Guest
Posted: Sat Nov 19, 2005 12:01 am    Post subject: Re: Building a pool lap timer Reply with quote
On 2005-11-16, Woody Brison <woody_brison@yahoo.com> wrote:
Quote:

Jasen Betts wrote:
from the safety standpoint and to keep the PC away from corrosive chemicals
it may be better tu use an air-filled pressure pad connected by a long hose
to a remotely located pressure switch connected to a old mouse (or directly
to pins used for the fire button on the joystick port etc...).

So can you pop it a couple of times while the coach is looking
elsewhere? or will repeat hits within say 30 sec. be locked out

not by the hardware, That's a software issue... if there's a pad at each end
that'd stop that sort of cheating.



--

Bye.
Jasen
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