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Search: Keyword(s): ; Posts Made By: ullbergm
Forum: DIY 07-20-2010, 11:18 AM
Replies: 36
Views: 5,899
Posted By ullbergm
Well, that was easier than i thought.. :) I...

Well, that was easier than i thought.. :)

I can talk to the DS1307 to get/set the time, now i need to work on having it trigger a schedule.
Forum: DIY 07-20-2010, 01:28 AM
Replies: 36
Views: 5,899
Posted By ullbergm
The last update was a little short, here is a...

The last update was a little short, here is a more detailed account of what i've been up to with this project.

After struggling to get the LCD and serial communication to work using FreeRTOS i...
Forum: DIY 07-19-2010, 10:58 AM
Replies: 8
Views: 3,262
Posted By ullbergm
Ugh, the boss vetoed it, its on hold for now...

Ugh, the boss vetoed it, its on hold for now until i can either convince here it looks alright or change the design to her liking :)

In other news, i've made some progress on the aquarium...
Forum: DIY 07-19-2010, 03:56 AM
Replies: 36
Views: 5,899
Posted By ullbergm
Progress :) LCD interface prototype is...

Progress :)

LCD interface prototype is running, it doesn't do anything but right now i'm just trying to get the peripherals to talk to each other.

Next up is the scheduler, basically i'll be...
Forum: DIY 07-08-2010, 04:02 AM
Replies: 8
Views: 3,262
Posted By ullbergm
I have a topfin from petsmart and it already has...

I have a topfin from petsmart and it already has a black plastic trim at the bottom, to me it would look better if i covered that with wood. :)
Forum: DIY 07-08-2010, 04:00 AM
Replies: 8
Views: 3,262
Posted By ullbergm
That's true, i had not thought about the the...

That's true, i had not thought about the the screws going in to 3/4 vs 1.5".

thanks
Forum: DIY 07-07-2010, 11:14 PM
Replies: 8
Views: 3,262
Posted By ullbergm
Question DIY stand for 125 gallon tank - feedback please

Ok, so my 125 gallon tank developed a small crack in the top of it.

The good news is that after calling the manufacturer they are going to let me have the replacement tank for a few weeks before...
Forum: DIY 07-07-2010, 10:55 PM
Replies: 36
Views: 5,899
Posted By ullbergm
Project has been on hold while waiting for some...

Project has been on hold while waiting for some parts to come in, they finally arrived and i'm going to get going on this again.

After i build a new stand for my tank.

Some highlights from the...
Forum: DIY 05-20-2010, 04:30 AM
Replies: 25
Views: 2,061
Posted By ullbergm
I think that to make things even easier we could...

I think that to make things even easier we could probably just have the base controller be on a prototyping board, we are only talking about a few components in the end.
ATmega
Power
USB (serial...
Forum: DIY 05-20-2010, 04:20 AM
Replies: 25
Views: 2,061
Posted By ullbergm
Another option to get things started if people...

Another option to get things started if people want to build sensors, LED drivers, etc. would be to do something like this:
http://www.maxim-ic.com/app-notes/index.mvp/id/3230
Forum: DIY 05-20-2010, 04:13 AM
Replies: 25
Views: 2,061
Posted By ullbergm
Not sure about the cost of the overall board, but...

Not sure about the cost of the overall board, but the nice things about the atmega chips is that they have everything listed above except for the USB part.

Even if you go with a big chip like the ...
Forum: DIY 05-17-2010, 02:23 PM
Replies: 25
Views: 2,061
Posted By ullbergm
What do you guys think about using SMBus? Check...

What do you guys think about using SMBus? Check out this atmel app note:

AVR316: SMBus Slave Using the TWI Module on tinyAVR and megaAVR devices (20 pages, revision A, updated 10/05)
This...
Forum: DIY 05-17-2010, 09:47 AM
Replies: 25
Views: 2,061
Posted By ullbergm
Definitively on my list of things i want, it's...

Definitively on my list of things i want, it's much easier to pick out patterns when you can look at a graph over time with the different measurements on it.

I was planning on doing something...
Forum: DIY 05-15-2010, 08:18 PM
Replies: 25
Views: 2,061
Posted By ullbergm
It could be done different ways, one way would be...

It could be done different ways, one way would be to make two generic devices, one that measures the pH and one that is a relay/solenoid to dose the tank / turn on/off CO2. In that case the brains of...
Forum: DIY 05-15-2010, 01:08 AM
Replies: 25
Views: 2,061
Posted By ullbergm
I know that some of these would simply be used...

I know that some of these would simply be used for "fluff" in the GUI but i think it would make the controller configuration easier.
As far as the device types there will most certainly be overlap,...
Forum: DIY 05-15-2010, 12:41 AM
Replies: 25
Views: 2,061
Posted By ullbergm
I like the idea, only thing is that it makes...

I like the idea, only thing is that it makes coding the controller piece a little harder if you can't make any assumptions of what commands are supported by the devices. But it does remove the need...
Forum: DIY 05-15-2010, 12:34 AM
Replies: 25
Views: 2,061
Posted By ullbergm
makes sense, I'm primarily a software guy :) ...

makes sense, I'm primarily a software guy :)

making the assumption that you don't know the number of parameters passed until after knowing the command it'd be easy enough for me to do something...
Forum: DIY 05-14-2010, 12:44 PM
Replies: 36
Views: 5,899
Posted By ullbergm
I created a separate thread to discuss the...

I created a separate thread to discuss the details:
http://www.plantedtank.net/forums/diy/108387-common-communication-spec-diy-aquarium-controllers.html
Forum: DIY 05-14-2010, 12:42 PM
Replies: 25
Views: 2,061
Posted By ullbergm
Lightbulb Common communication spec for DIY aquarium controllers

Greetings,

For a history on where this started check out this topic:
http://www.plantedtank.net/forums/diy/106750-micro-controller-project.html

In a nut-shell a couple of us realized that we...
Forum: DIY 05-14-2010, 11:25 AM
Replies: 36
Views: 5,899
Posted By ullbergm
Micro-controller project

I think that you are right that I2C is a good idea for a shared community project, just about every uC manufacturer has low end devices that supports it.

One thought I had about the examples you...
Forum: DIY 05-13-2010, 05:01 PM
Replies: 36
Views: 5,899
Posted By ullbergm
Have you looked at the modbus protocol? Maybe we...

Have you looked at the modbus protocol? Maybe we could get some ideas from that:
http://en.wikipedia.org/wiki/Modbus
Modbus RTU Frame Format

Name Length Function
Start 3.5c...
Forum: DIY 05-13-2010, 12:37 AM
Replies: 36
Views: 5,899
Posted By ullbergm
The reason i was thinking rs-485 is that its a...

The reason i was thinking rs-485 is that its a ruggedized protocol and all you really need to do is to buy some rs-485 ic's but it would $2-$5 per device which may be undesirable.



I started...
Forum: DIY 05-12-2010, 12:39 AM
Replies: 36
Views: 5,899
Posted By ullbergm
We need some kind of discovery protocol, nothing...

We need some kind of discovery protocol, nothing fancy i dont think, just a simple get-device-type(deviceid) should do, plus that would return the device type as well removing the need to query the...
Forum: DIY 05-11-2010, 11:51 PM
Replies: 36
Views: 5,899
Posted By ullbergm
I2C would work (and would probably be easier as...

I2C would work (and would probably be easier as well), i may have been over complicating things with a 485... The reason i was thinking of going with something more industrial is because of the...
Forum: DIY 05-11-2010, 12:25 AM
Replies: 36
Views: 5,899
Posted By ullbergm
Interesting device, $60 is definitely very...

Interesting device, $60 is definitely very reasonable for a uC with a display, box, etc.
The uC's themselves are pretty cheap (i think the one i'm using is less than $15 but that is the very top end...
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