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Old 01/09/2011, 07:48 PM   #1
maik1
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Water sensor line

Should I get water leaking or water spilling I WILL know about it very quickly.





The 2 silver lines on the floor are 2 small aluminium foil tape that is used on heating/cooling ducts.





I kept a small gap between the 2 strips of foil so it is VERY sensitive!
I have the lines running under my Calcium reactor and my return pump too.


You can see 1 drop of salt water sets off the Alarm. It does work with RO water too but it takes more than 1 drop of RO water, it would take more like 5 or 8 drops. So I have my Apex email me the water alert and I also hooked it up to my home automation system so it flashes my lights in the specified rooms in my house.




Parts needed:
Roll of Aluminium Foil Tape.
TIP42G PNP Transistors.http://search.digikey.com/scripts/Dk...me=TIP42GOS-ND
SPDT relay 30 amp.http://search.digikey.com/scripts/Dk...&name=PB680-ND
12 Volt Power supply.


Everything you need. The penny is for reference.



All the pins are marked on the relay.




Solder the cables onto the TIP42G PNP Transistor. The red and black cables in the centre of the relay are the Switch input wires for the SL-1 on DA RKE or Breakout box on Apex.
The other Red wire on the right side of the relay and the Brown wire are your Power supply 9Volt DC or 12 Volt DC.




That's it!




Tape off all connections with electrical tape, wrap the two pink wires to the Aluminium foil tape to make contact.

Enjoy!

Maik



Last edited by maik1; 01/09/2011 at 08:24 PM.
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Old 01/09/2011, 08:42 PM   #2
FiReBReTHa
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GREAT photos BTW!

made this easy to understand.


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Old 04/22/2011, 04:36 AM   #3
mynameisjoe
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Interested to see how the LED's affect the coralS Have you noticed any difference on the older tank?

...subscribed...


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Old 04/22/2011, 05:09 AM   #4
capecoral
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Nice idea... kind of an extension of a regular water sensor.


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Old 10/21/2011, 05:44 PM   #5
James77
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Can you add multiple "sensor" strips to the same power supply and TIP42G? I know it would only trigger one Apex channel if it could be done that way, but if water is on the floor, thats all I would need to know.

To get independent channels, I assume you woul need a whole set of the above for each channel?


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Old 10/21/2011, 06:04 PM   #6
maik1
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Yes you can have multiple lines or just make your line extra long to reach the area you need to monitor.

Maik1


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Old 10/22/2011, 01:10 AM   #7
wonslung
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i just bought a water alarm. I love the foil idea though, it could make my water alarm better.


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Old 10/22/2011, 07:39 AM   #8
Tigé21v
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Very cool idea. Seems like there'd be lots of uses for this. Bookmarked this thread.
Thanks


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Old 12/20/2011, 11:48 AM   #9
CamTurner
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Is it just me or are the pictures on this thread missing?


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Old 12/20/2011, 11:56 AM   #10
maik1
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Quote:
Originally Posted by CamTurner View Post
Is it just me or are the pictures on this thread missing?
The pictures show up just fine for me when I login.

Maik1


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Old 01/12/2012, 01:38 PM   #11
waynefish
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Just tape and wires?

Thanks for the write up. Is there a reason you wouldn`t be able to use just the tape and some wire connected to the Apex breakout box?


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Old 01/12/2012, 02:24 PM   #12
maik1
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Quote:
Originally Posted by waynefish View Post
Thanks for the write up. Is there a reason you wouldn`t be able to use just the tape and some wire connected to the Apex breakout box?
Only one, it won't work .

Maik1


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Old 01/12/2012, 02:33 PM   #13
Yreka
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AWESOME !! will be making one of these.. Great DYI, thanks


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Old 01/12/2012, 02:53 PM   #14
waynefish
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Without controlling the lights

Quote:
Originally Posted by maik1 View Post
Only one, it won't work .

Maik1
If I didn't want it to control the lights, but just set an alarm off with the Apex unit, it wouldn't work without the relay and adapter?

I figure it would be like a float switch opening or closing. No? Pardon me if I'm way off, not to familiar with electronics.


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Old 01/12/2012, 03:06 PM   #15
maik1
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Quote:
Originally Posted by waynefish View Post
If I didn't want it to control the lights, but just set an alarm off with the Apex unit, it wouldn't work without the relay and adapter?

I figure it would be like a float switch opening or closing. No? Pardon me if I'm way off, not to familiar with electronics.
The salt water is simply not strong enough to ground out the apex port, that's why you need the relay & TIP42G. The Tip42G is like an amplifier to take a small signal like your salt water would give and make it stronger via the relay. This is the best way that I can explain this setup.

Hope that helps.

Maik1


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Old 01/12/2012, 04:52 PM   #16
skunkmere
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Thanks for the write up, great job.


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Old 01/26/2012, 02:28 PM   #17
Trickman2
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like the idea, how is the aluminum tape connected to the wires coming out?

On the 12 volt adapter of much MA is required, is their a max limit on MA?

Also what about adding a alarm piezo siren, etc?



Last edited by Trickman2; 01/26/2012 at 02:34 PM.
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Old 01/26/2012, 04:08 PM   #18
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Very cool!


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Old 01/26/2012, 04:45 PM   #19
rk_tek
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Very nice. This could be extremely useful since I live on the second floor of an apartment.


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Old 03/30/2012, 10:32 AM   #20
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Thanks for the write up Maik! Very useful..


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Old 06/06/2012, 06:50 AM   #21
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thanks.... very nice


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Old 06/06/2012, 11:34 AM   #22
tommer725
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i might use this one day


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Old 06/06/2012, 11:48 AM   #23
6Speed
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I like this idea a lot. I can see a lot of false alarms, though, with my tank. Rimless plus snails crawling out all the time and clownfish randomly splashing water over the top!

I normally find at least 1 snail per day on the floor next to the tank. Somehow they never die. lol


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Old 06/06/2012, 03:09 PM   #24
david00061
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worked like a champ. thanks


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Old 06/20/2012, 03:19 PM   #25
acorral
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Working on doing mine... I found TIP42C, getting TIP42G would be little more hard for me but Iguess it should work right? What are your thoughts on this?


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