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The Wasser-Controller

45K views 142 replies 34 participants last post by  Wasserpest 
#1 ·
I have been pondering this for quite a while... In our age of cheap electronics, there should be affordable timers with multiple, independently controllable outlets. Yet, for some reason there is no such thing. The closest you can get for "affordable" is the Coralife double strip which is prone to bursting into flames. If you spend some serious money, you can get the Aquacontroller. After you pull out your wallet for the base unit, equipment still needs to be connected which costs even more.

So, seeing a niche here, I present you the Wasser-Controller, which is affordable, flexible, and partially hand-made. The original idea was discussed here, but there has been some fluff accumulating in that thread so I figured it might be better to start over.

What I am switching/pumping right now:

Main lights
Sunset/sunrise lights
Moon lights
Macros
Micros

What we need:

Irrigation controller ($35 for 6 station DIG 8006)
Relays (~$3 each)
Outlets ($0.70 each)
Some wires and a soldering iron to connect all of that

Total cost was around $50.

Initially I tried to take an existing power strip apart and make it work for my purposes, but that didn't work so well.



So instead, I attached the controller and outlets to a wooden board, leaving some space for the relays.



After soldering it all together I found out that two of the relays were faulty. Luckily I had bought 2 more, so with a few choice words I un-soldered and replaced them. I was going to enclose it all with more wood panels, but then I saw a box (from an electric shaver that I just bought with all the money I saved) and for some reason the whole setup just so fit in there. Fixed the front with some screws and saved myself a lot of woodworking.



Okay, let's call it a prototype. :redface: It is now hidden in a corner behind some other equipment, so no need for beautification.

Since the whole setup is a bit confusing, I tried to create a schematic that shows how things flow and switch:



Now that it has been working for a few day I must admit that I live with a feeling of great accomplishment. Had a long power outage the other night, and thanks to the 9V backup battery in the controller I didn't have to change two mechanical and reset two electronic timers. Not a single problem so far.

Things to consider...

1) Putting it all together in a package like I did makes things compact, but access to the controller is somewhat difficult. So if you are still figuring out your schedules, and/or have a desire to constantly fiddle, it might be better to put the timer in a better accessible spot.

2) Driven by an irrigation controller, it is very easily adapable for all sorts of solenoids to automate water changes. One day my tank will have an overflow for "used water" and I will just run the water change nightly or whenever without having to remember.

3) Unless you are familiar with electricity and know how to hold a soldering iron, do no attempt anything like that because you will surely hurt yourself and your loved ones. This isn't meant to be an instruction, rather I am just sharing an idea.
 
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#3 ·
Nice work, now if someone could set the wasser up with some punched out DC8 style housings we could get going on a true home brewed controller.

A couple questions:

1. What's the spec on the relay, there's an awful lot to choose from.
2. Can you see a cost/space effective way to control 12 to 18 outlets?

I'd read of some famed Siemens industrial controller that was quite cheap a ways back that looked like it had potential, not as cheap but still sub $75 if I remember right.
 
#5 · (Edited)
1. What's the spec on the relay, there's an awful lot to choose from.
I used POTTER & BRUMFIELD KHAU-17A11-24 RELAY 14 BLADE 24VAC from ebay. If you have time to shop around you can get those relays cheaper from some surplus places and save some dough.

2. Can you see a cost/space effective way to control 12 to 18 outlets?
The controller I used maxes out at 6 zones, there might be others that can do more, but they might not handle two at a time and independent programming. You could use 2 or 3 of the controllers. Controlling 18 outlets (if you must) would cost you about $150, with the AC Jr. probably around $400, so still some savings although at some point it might be more convenient to just deal with a single control module.
Space-wise you would need room to mount the controllers and outlets. The relays don't take that much space.
For a future tank I will mount the outlets directly in the stand, with a more accessible controller, and the wires all hidden away safely.
 
#4 ·
So it controls you with 6 switches?:thumbsup:
hehe

Looks nice and is an excellent DIY.
Thanks for starting a new post and the schematic.
This should work pretty well.

I've always eyeballed those irrigation controllers.

Thanks for the thread
Two green thumbs up!

Tom Barr
 
#8 ·
Nope, the relays don't care if there are low amps going through the contacts. As long as it isn't more than they are spec'd for there is no issue at all.

Thanks aquanut, Tom, and all others for your positive comments! Makes the many hours of tinkering worth it.
 
#9 ·
Excellent project and write up. Thanks for taking the time to share it. :proud:

Here's a great site for project enclosures that offer free samples of various size/type project boxes. Knowing how you tinker, I'm sure you can find a use for them...lol
I've received some great free boxes from them in the past that I used for various PC and electrical projects.
 
#11 ·
WP - Outstanding! You are to be congratulated. Thank you!

This makes me want to go grab my soldering iron. I'm gonna go grab my Jemco catalogue and see what kind of enclosures I can find. But first a few questions...

1) I'm I seeing this correctly? That's two sockets, and two socket pairs (two plugs each) that are being controlled?
2) And that also you have not wired the 5th and 6th controlled circuits to the 120V, but to the 24v because your intention is that they are dedicated to your 24v solenoids?
3) Are those relays all different? They look like it. Maybe similar function, just what was in your grab bag at the time?

And I'd like to chime in as a "high tech", heavily controlled kind of guy...

I think this would work just fine, or maybe a pair of them. Being limited to two channels at once isn't such a big deal. You wouldn't want to drain and fill your tank on the same time. That should be sequential. So only one channel used there. And if you were doing fert dosing, well you could do that when you were not draining or filling. So again, only one channel used.

The other channel would control your lights, and depending on timing, that too might be on the same control channel. So did I say you might need two of these? Shucks. Sounds to me like one might do just fine!

Thanks for trying this and sharing it WP. I'm looking forward to seeing where this goes.
 
#12 ·
Looks totally awesome. I'm eventually going to get to using a Omron PLC for my tank this summer. Looking at your circuit diagram it appears you are switching the 120V nuetral. I am curious as to why you chose not to switch the 120V hot side, as this would eliminate the electrical potential on your equipment when its not running.
 
#16 ·
Really? Seems as if the neutral runs from the line straight to the outlets... not switched.
In my diagram, I haven't really marked what is hot and what is neutral. But you can see the neutral (white wire) goes to the outlets, while the hot (black wire) connects to the relays and is therefore switched. So I agree with tropicalfish. :)
 
#15 ·
Thank you Steve for your kind words. As always, you think things through a bit more thorough, so let me try to address your comments...

1) I'm I seeing this correctly? That's two sockets, and two socket pairs (two plugs each) that are being controlled?
It is three socket pairs, making for a total of 6 outlets (A-F in my schematic). The first two (A and B) are switched independently, while C and D as well as E and F are flip-flops. When one of them is on, the other is off. In other words, C/D and E/F are both controlled by a single relay.

2) And that also you have not wired the 5th and 6th controlled circuits to the 120V, but to the 24v because your intention is that they are dedicated to your 24v solenoids?
That is correct... I could have connected the 5th and 6th controller outlet to two more relays, but a) I didn't see the need to switch THAT many things independently, and b) yes, I want to use at least one of them for driving water changes in the future.

3) Are those relays all different? They look like it. Maybe similar function, just what was in your grab bag at the time?
No, they are all identical. In the first picture, I took 4 of them and placed them in different ways so four sides can be seen. Hehe.

I think this would work just fine, or maybe a pair of them. Being limited to two channels at once isn't such a big deal. You wouldn't want to drain and fill your tank on the same time. That should be sequential. So only one channel used there. And if you were doing fert dosing, well you could do that when you were not draining or filling. So again, only one channel used.

The other channel would control your lights, and depending on timing, that too might be on the same control channel. So did I say you might need two of these? Shucks. Sounds to me like one might do just fine!
I think the 6 zones give you quite some flexibility. Keep in mind that in another project I created a Delay Timer to dose micros, and I can connect that one to any other switch. For example, my macros dose at 10:28, while the micros are connected with the moonlight which turns on at 21:59 (lights turn off at 22:00), and they run for like 4 seconds as per delay timer setting.

Two at a time is much better than one at a time... still a bit limiting. For my daytime high light period I have two banks of light running at the same time, so obviously there is nothing else that can be switched during that time. But everything else (moonlights, water changes, fert dosing) takes up relatively short periods so there is a lot of different things that can happen successively after lights are out.
 
#17 ·
Wasserpest, another amazing project and thanks for sharing this with the group. My question is a little more elementary, but I am not completely up to speed when it comes to electronics and wiring, so could you suggest any books or sites I should check out before tackling a project like this? Thanks for your time and tinkering!
 
#20 ·
Thanks for your kind words. To be honest, I don't know what to recommend. I learned the basics of electricity in school, and since early age, always had a soldering iron close by. ;)

I am sure there are websites that teach some basic stuff. If you are the reading sort of person, check your library, I am certain there is a "Electronics for Dummies" or such which can explain some of the basics in an entertaining way (I haven't checked, so maybe there isn't).
 
#19 ·
In our age of cheap electronics, there should be affordable timers with multiple, independently controllable outlets. Yet, for some reason there is no such thing.
Here in Australia our local hardware store stocks $25.00 timer boards that have a digital timer on one end with 4 outlets that are independently controlled. You can set up to 4 on/off cycles for each outlet with 1min resolution.

On my tank I use one outlet for my CO2 solenoid and the other three run my halide lights and sunrise/sunset lights. All are on different programs to give a staggered lighting effect.

I'm surprised that you cant get something similar there. I wonder if it has something to do with the relays required for switching higher current in the US? Each outlet is rated for 240V @ 10A in AU vs the need for 110V @ 20A in the US.
 
#22 ·
I don't think it is the current. Some of the small relays can switch even 30A. Conversely, for most applications smaller ratings are alright. 200W of light will only draw about 2A at 110V...

Perhaps there IS something like that available, sounds like what you are describing is exactly what I thought should be available. I just haven't found anything like it yet.

BTW the controller is working flawlessly... No issues with anything so far. Remains to be seen for how long it will hold up.
 
#24 ·
Sorry, I missed your request for an update... here it is:

This is one of the few DIY projects that worked out perfectly. Not sure for how long the little relays hold up, but so far, not a single problem at all.

Thanks to the battery backup it is holding time extremely well, not affected by power outages.

Thanks for asking... very recommended if you don't mind soldering a few wires. I had a few PM's asking for specifics... don't be shy and post your solution if you built one.
 
#29 ·
Out of curiosity, (I am not that knowledable with this little electronic gizmo stuff), but is it necessary to have a 30 amp relay? To me it is just a "electric switch" so really the current is just being transfered when the relay trips right? So would a smaller amperage relay do just the same, depending on the output from the controller?

Forgive my ignorance...
 
#30 ·
The amperage refers to the max that can be switched... has nothing to do with what the relay draws itself to switch its state.

If you use a relay to switch a higher current than what it is spec'd for it might burn up the contacts, burn up the whole relay, and/or stress whatever you have connected to it.

So if you know that your load current will not exceed 2A, then you would be fairly safe with a 2A relay. However, a 30A relay might work just as good. A possible downside of "bigger" relays is that their wiring might require more current as well, therefore wasting some energy when you have it in its powered state for extended times. The relays I am using use about one Watt each, so it isn't a big deal.

I was just looking for cheap 24V relays, and these were the ones I came across. Not necessarily the best choice, but they seem to do the trick for now.

(BTW - I am not an electrician or anything... just trying to answer questions as good as possible, but take my speculations with a few grains of salt or something :icon_wink).
 
#45 ·
I know this thread is old, but I'm thinking of ditching my Coral Life Digital timers for a Wasser-Controller setup like you have. I found that same exact power supply for $34. Can you comment on the reliability of that power supply? Heat issues? Any problems at all? Anything you would do different?
 
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