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Topic: PoolDuino - Automate my pool with Arduino (Read 16 times) previous topic - next topic


markB I don't think this stepper motor would be strong enough to turn a ball valve. If so PLEASE LET US KNOW!! This would be a great and cheap mecanism.

I agree. You would need a gearbox, and then you may as well use an actuator, unless your're a mechanical wizz.
I looked at automating a 1 inch ball valve and it got too hard, thats why I started on the gate valve idea.
Sorry no cheap solution...

Those pumps look like a great idea. Far better than adding a VFD.

Thanks for the PH probe link, they do seem a little cheap, but maybe they work fine for a year or more.



regarding my water leveler failing, since i'm using this sprinkler solenoid, if we loose electricity while it fills the pool, the water will stop! that's what's cool about it.

Ok so a few things. Those are not pretty, just basic drawing I'm doing to help myself understand where I'm going with this. again, basic!

First diagram is the logical flows for the water level. I want to make sure I cover every states of the software, to prevent any failure. I'm hoping to have more success with the ethernet shield since you pointed out some of them are failing.


second picture is something i'm still not sure about. I'd like to come up with some sump tank where I could put all my equipments. If you're familiar with salt water aquarium tank, that's what we use (sump tank) for the monitoring/filtering stuff. This small tank would probably be a cylinder with a radius of 6-8 inches, 2-3 foot tall, and have a pipe (3-4 inches) to connect it to the pool. The pipe would need some angle to prevent water staying in during winter. I would also get some portion of the water output from the pump in the tank to get a fresh read on every probe. The temperature would be higher than the rest of the pool, but that's alright if you know and can take this into consideration.


Dave, I saw on your website that you're logging the water temperature. Which probe do you use? I was planning to use a/some LM35DZ and encapsulate them like this guy did:


talk to you later!



This is the temperature sensor.  I've had three of these in service for five years and they don't seem to fail.....ever.  The one problem with them is that they are black and heat up in the direct sun.  That can easily be fixed with a piece of metal tape over the part that is exposed.  Of course, if you want the temperature of the ambient air don't cover them.  They can be purchased for far less than the picture shows if you look around.  http://www.amazon.com/dp/B004S3KCLC/ref=asc_df_B004S3KCLC1605341?

However, waterproofing one of the temperature sensors we use with the arduino is a piece of cake, you only have to protect the wires coming out the bottom of the sensor and you can do that with epoxy or polymorph or a plastic straw filled with silicone caulk.

The way I've seen samples taken is to drill directly into the 2 inch pipe and just stuff the sensor in there.  This is done on both my solar and pool temperature probes.  For ph, you can put a piece of 6 inch pipe in the plumbing somewhere and create a water filled area to insert the probe.  Other folks may have better suggestions in this area, check some of the swimming pool forums for tips on this kind of thing.  That's where I got the acid injector idea.

I don't see anything wrong with your logic for the pool water leveling.  Just remember to watch it carefully for the first few days to be sure nothing bad happens.  Try turning the feed line down to a dribble to be sure you don't go too far with it.
Trying to keep my house under control http://www.desert-home.com/


How about these

When I was repairing spa controllers, they used a stainless sleeve into the filter housing, and a cable gland that sealed against the sleeve.
If you do it that way, use a bit of heat transfer paste (white stuff used between a transistor and the heatsink) to improve the thermal transfer.



I am Soooooo going to get one of those temperature sensors.  I can hook one of those to an XBee inside and thread the thing outside to measure air temperature.  It will be the next sensor I use for testing the hot water in my solar water heater.  Thanks a lot for the link.  I should have known Terry would have something cool like that.
Trying to keep my house under control http://www.desert-home.com/

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