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billy2k1

Member
I have an idea that i want to share with others to see how it can be improved. I built a control box to automate the most common tasks when you own a saltwater aquarium.
1-It simulate the day light cycle by turning lights on at different time intervals.This function also controls a moon light and two fans for temperature control.If the canopy gets to hot due to a fan failure it turn the lights off and triggers an alarm.Even if the temperature goes back to normal, lights won't come on until i press reset button.
2-I have a fuge (hang on type) and it also controls it's light and pump.
If the water level goes too high in the fuge section the controller will turn water pump off and will trigger an alarm.
Even if the water goes back to normal level, water pump won't start until i press reset button.
3- At feeding time,i just have to push a button and the filter (canister) and fuge pump will go off for 20 minutes and they come back on automatically.Every 30 days an alarm reminds me to check filter.
4-At night time,every three hours a fan comes on to push humidity out of the canopy.
5-If for any reason i need to work with the aquarium and the lights are off due to the schedule i just have to push reset for 3 seconds and i can override the schedule and lights come on.When i get done i just push reset for 5 seconds and release the override and lights go back to normal schedule.If i forget to reset them, they automatically go back to schedule
after 3 hours.
6-The only alarm allowed to go off at any time is the high water level alarm.Any other alarm will sound between 3pm and 10 pm.
This is the time frame for me to work with my tank except for a high water level which is considerate an emergency.
7-All sensors are low voltage (24v ac) so no worries about getting shock.
8-When you loose power you don't have to worry about resetting any times.It will keep running on schedule when power comes back.
Any suggestion will be greatly appreciated.Any question just post it on the threat.Thanks for taking your time to read this...

ps:red button= reset,black=feeding time and big red button=buzzer


 

nel621

Member
Very clever.I'm sure it took a lot of planning not mention a good understanding of electricity.
 

ifirefight

Active Member
Very nice! Im sure Dave (SCSInet) will chime in, and be one of the few people on these boards to actually understand what you have done. I couldnt build it...but I know good stuff when I see it.
 

natclanwy

Active Member
I have looked into doing this also and so far I have not found a PLC setup that is cheap enough to justify building one over just buying a prebuilt controller like the Reefkeeper II. If you don't mind me asking what was the cost of this setup?
 

wattsupdoc

Active Member
HAHA! Very nice sparky!
That Hoffman's loaded!
How 'bout an equipment list? you must work for an industrial plant or industrial electrician somewhere. That little gadget would cost a mint otherwise.
 

billy2k1

Member
I am using a smart relay programmed using winlgc sofware,a thermostat,float switch and a pair of relays and transformer to be able to use 24v around water for safety reasons.I know,i make it sound easy and in fact it isn't that hard.I am an electrician but all this automation stuff i learned from books and internet forums.Same way with my aquarium.Three or four years ago i didn't know anything about it until i found this forum.After a lot of reading i put my first aquarium toguether and here i am.Still learning and looking for ways to get better and this is one good way to do it,asking you guys.
 

billy2k1

Member
I spent around $300 but that is because i got some good deals at +bay....
If you want to buy everything new it is way expensive.The reality is that i love control work and found a good excuse in my aquarium
 

scsinet

Active Member
Originally Posted by ifirefight
http:///forum/post/2535268
Very nice! Im sure Dave (SCSInet) will chime in, and be one of the few people on these boards to actually understand what you have done. I couldnt build it...but I know good stuff when I see it.

Indeed I will....
in a word... COOL.
I have a couple questions...
The "smart relay"... is this just a PLC? I assume it is from the software you used to control it. What model?
Did you consider using a plastic NEMA enclosure instead of the metal? (rust???) I was looking at these enclosures for my controller project but I couldn't find them for a decent price. Where did you get this one? good price?
 

misfit

Active Member
What about taking you controller and mounting it on your tank the run your wires to a smaller NEMA box for all your relay's,plugs, etc so you can hide it a bit better.
 

billy2k1

Member
Yes,it is a basic plc if you want to call it that way but it is not as complicated to work with.This is the one that is capable of doing the job.You won't need the small display in it.For big programs it is completely useless,you will need a computer to program it.You can buy the relay,software and cable for computer for around $179.00 but this price is for a brand new unit.I Got mine from eeebay for an excellent price.Same deal with the box.I paid $39.00 for a $145.00 box.If you take your time you can find everything at a good price.

 

billy2k1

Member
The reason why i am using a metal box is because that one cost me $39.00 dollars and it wasn't available made out of plastic at such a nice price.
Also,i have everything in the same box because this specific relay is 120v and you shouldn't run 120v exposed to it.I also want to say that with this setup the possibilities are endless if you know how to program using winlgc and it isn't hard at all.Some body mention Reef keeper II which is a good
option but in my case if my system died i can find and buy just the part that goes bad and not the hole module.I think is a matter of preference.If you like DIY things this is the way to go.In my particular case i just love my hobby and not everybody can call his job a HOBBY
 

billy2k1

Member
You can also get a winlgc demo so you can try it before you buy it.Always use the "function blocks" to program,it is a lot easyer than latter schematic.
 

billy2k1

Member
Hey Dave,after reading part of your thread on the 180g tank i noticed that you can take advantage of a smart relay (PLC)and you don't have to worry about any internal components like transistors,capacitors,resistors or anything like that.All you need to use is a bunch of inputs like switches,float switches,flow switches,thermostats etc. and your outputs (Bunch of outlets)
for lights,pumps,water heaters etc.The Relay cpu takes care of all the logic in order to make everything work according to the program.Your FUNCTION BLOCKS acts as your transistors,ice cube relays etc but only internally in cpu not physically,thats the beauty of it.If you change your mind about something you just change your program and you are done.I will try later during the week to upload a couple of pics. about function blocks so you can see what i'm talking about.Once you get into this you won't stop looking for possible solutions to problems around your tank.Good luck and by the way,great job your tank...
 

scsinet

Active Member
Originally Posted by Billy2k1
http:///forum/post/2536897
Hey Dave,after reading part of your thread on the 180g tank i noticed that you can take advantage of a smart relay (PLC)and you don't have to worry about any internal components like transistors,capacitors,resistors or anything like that.All you need to use is a bunch of inputs like switches,float switches,flow switches,thermostats etc. and your outputs (Bunch of outlets)
for lights,pumps,water heaters etc.The Relay cpu takes care of all the logic in order to make everything work according to the program.Your FUNCTION BLOCKS acts as your transistors,ice cube relays etc but only internally in cpu not physically,thats the beauty of it.If you change your mind about something you just change your program and you are done.I will try later during the week to upload a couple of pics. about function blocks so you can see what i'm talking about.Once you get into this you won't stop looking for possible solutions to problems around your tank.Good luck and by the way,great job your tank...

It's all a matter of whether or not the smart relay can do A/D sampling to read in temperature, pH, and ORP values, and whether it can do PWM outputs to drive wavemaker and lighting triac channels.
That's the reason I went the way I did. Otherwise, I'd have used a PLC (I've got them lying about). That and I needed more than 40 I/O channels and live control from a PC.
I'm getting married in June and we're doing a lot of the planning ourselves, so lots of my objectives are on hold for now.
 

iluvswfish

Member
Sweet! Is there any way you could have a battery backup that would come on and run some powerheads in the tank in the event the power goes off?
 

billy2k1

Member
I am not sure how far you can make it work but i will be a great help i think.
By the way congrats. on your future wedding and get used to things being on hold from now on...
,just a joke
 

natclanwy

Active Member
The endless possibilities are one of the reasons I was looking into a PLC, I just hadn't found a PLC setup that was less than about $400 by the time I bought the I/O modules and software. This looks like it may be a good solution and will have to look at this smart relay, I also need to have the A/D sampling for temp & PH ect.. so this will be a key factor in whether this will work for me.
 
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