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Forum: Appliances & Gadgets 05-18-15, 12:56 PM
Replies: 76
Views: 95,683
Posted By Daox
I found a small inaccuracy with the code today. ...

I found a small inaccuracy with the code today. I wasn't resetting the variable that is used to hold the sensor readings. So, for example, on the first run through it starts as 0, takes 10...
Forum: Appliances & Gadgets 01-05-15, 09:28 AM
Replies: 76
Views: 95,683
Posted By Daox
As long as you're not physically wiring the pins...

As long as you're not physically wiring the pins together, the arduino software is smart enough to differentiate the digital pins from the analog pins. That shouldn't cause any issues. If you want...
Forum: Appliances & Gadgets 01-02-15, 08:58 PM
Replies: 76
Views: 95,683
Posted By Daox
That sounds like a very odd problem. It also...

That sounds like a very odd problem. It also sounds more like a wiring problem. Can you describe your setup and possibly provide a wiring diagram?
Forum: Appliances & Gadgets 01-01-15, 10:31 AM
Replies: 76
Views: 95,683
Posted By Daox
nkuck, I would suggest a static offset to correct...

nkuck, I would suggest a static offset to correct things. Say your sensor reading is off by 10F, just add 10 to the Ssensor variable. With the current way you're doing it, it may read normal at the...
Forum: Appliances & Gadgets 12-29-14, 10:10 AM
Replies: 76
Views: 95,683
Posted By Daox
I find it odd that your sensors are so far off. ...

I find it odd that your sensors are so far off. When I tested mine, they were pretty accurate.
Forum: Appliances & Gadgets 12-29-14, 07:58 AM
Replies: 76
Views: 95,683
Posted By Daox
It doesn't really matter if both sensors are off...

It doesn't really matter if both sensors are off as long as they're off the same amount and its consistent. You're only measuring the differential temperature, so they only need to be accurate to...
Forum: Appliances & Gadgets 12-19-14, 08:13 AM
Replies: 76
Views: 95,683
Posted By Daox
Well, I see one issue: It should...

Well, I see one issue:





It should be:

// read sensor inputs, convert to degrees, and assign to variables
Counter = 0;
Forum: Appliances & Gadgets 12-18-14, 02:16 PM
Replies: 76
Views: 95,683
Posted By Daox
Aha, found it after all. /* Thermal...

Aha, found it after all.

/* Thermal Differential Controller

The program monitors two temperature sensors and
activates a relay when one sensor is warmer than
the other.
*/

// Pins
Forum: Appliances & Gadgets 12-18-14, 02:07 PM
Replies: 76
Views: 95,683
Posted By Daox
Haha, I totally forgot to update this thread. ...

Haha, I totally forgot to update this thread. The new software smoothing worked very well. It still wasn't completely flawless, but it was much better. I'll have to grab that code when I'm home...
Forum: Appliances & Gadgets 12-18-14, 01:36 PM
Replies: 76
Views: 95,683
Posted By Daox
Hello nluck. Welcome to the site. :thumbup: ...

Hello nluck. Welcome to the site. :thumbup:

The LM34 will output 10mV per degree F (the LM35 does the same, but in degrees C). Each 'step' (aka the number returned by the analog read function)...
Forum: Appliances & Gadgets 05-13-14, 03:51 PM
Replies: 76
Views: 95,683
Posted By Daox
I updated the code to add some additional...

I updated the code to add some additional smoothing functionality. Now, the program will compare each of the 10 sensor readings to the average of the last set of sensor readings. If the temperature...
Forum: Appliances & Gadgets 04-25-14, 03:28 PM
Replies: 76
Views: 95,683
Posted By Daox
While I will probably do that (I'll try 6 degrees...

While I will probably do that (I'll try 6 degrees C), I do want to get this figured out so I can use it on future projects. I plan on making a similar controller for the solar hot water setup I am...
Forum: Appliances & Gadgets 04-25-14, 02:59 PM
Replies: 76
Views: 95,683
Posted By Daox
I was talking about electrical spike. I wouldn't...

I was talking about electrical spike. I wouldn't imagine that there is that much breeze up in the attic. I suppose putting the sensor in a blob of silicon or something would be a good idea though. ...
Forum: Appliances & Gadgets 04-25-14, 07:31 AM
Replies: 76
Views: 95,683
Posted By Daox
There is a hysteresis programmed in already. ...

There is a hysteresis programmed in already. Right now I have it set to turn on at 4C degrees above kitchen temperature and turn off when it gets down to 2C above kitchen temperature. The noise in...
Forum: Appliances & Gadgets 04-23-14, 11:26 PM
Replies: 76
Views: 95,683
Posted By Daox
That sounds like a good idea. I'll have to give...

That sounds like a good idea. I'll have to give it a try.

Sadly no. I don't have a laptop available to me anymore, and no USB cord is long enough to reach up into the attic. I'd like to though....
Forum: Appliances & Gadgets 04-23-14, 07:54 AM
Replies: 76
Views: 95,683
Posted By Daox
Haha, thats very cool! I tried out the new...

Haha, thats very cool!

I tried out the new code last night. It worked better than the quick and dirty version, but there was still some switching on and off. So, I'm looking from suggestions...
Forum: Appliances & Gadgets 04-22-14, 03:45 PM
Replies: 76
Views: 95,683
Posted By Daox
Lately, I've been having some issues with my...

Lately, I've been having some issues with my thermal differential controller. The fans will turn on and off a LOT unless it is really hot up in the attic. What I believe is happening is there is...
Forum: Appliances & Gadgets 10-20-13, 04:21 PM
Replies: 76
Views: 95,683
Posted By Daox
Welcome to the site wadevcamp. The best way...

Welcome to the site wadevcamp.

The best way to prevent ice damning is really to air seal your heated space from your attic and add more insulation if necessary. This has the byproduct of...
Forum: Appliances & Gadgets 09-06-12, 07:52 PM
Replies: 76
Views: 95,683
Posted By Daox
I really haven't done anything with it since my...

I really haven't done anything with it since my last update. The original setup is still working great with my attic fan.

My plans haven't changed to upgrade it when I install my solar hot water....
Forum: Appliances & Gadgets 02-10-12, 04:29 PM
Replies: 76
Views: 95,683
Posted By Daox
I think its time for an upgrade here. The...

I think its time for an upgrade here. The current version of the thermal differential controller has been working great for over a year in my attic. However, I am planning on putting together a...
Forum: Appliances & Gadgets 04-22-11, 12:43 PM
Replies: 76
Views: 95,683
Posted By Daox
Here is a quick parts list of what you'll need. ...

Here is a quick parts list of what you'll need. I've linked to a few places where I've bought things from before.


Arduino (http://shop.moderndevice.com/products/arduino-uno) - your choice in...
Forum: Appliances & Gadgets 04-21-11, 10:58 AM
Replies: 76
Views: 95,683
Posted By Daox
I have the book Practical Arduino which is a...

I have the book Practical Arduino which is a collection of arduino projects and it steps through the design and explains everything. In it is a DIY water meter tutorial with a LCD and a couple...
Forum: Appliances & Gadgets 04-21-11, 08:58 AM
Replies: 76
Views: 95,683
Posted By Daox
I suppose its time to make a parts list in case...

I suppose its time to make a parts list in case anyone would like to replicate the controller (easily). I'll work on that soon and post it up.

I just got my break out board that'll allow me to...
Forum: Appliances & Gadgets 04-17-11, 12:19 PM
Replies: 76
Views: 95,683
Posted By Daox
So, I think its finally ready to go. I made some...

So, I think its finally ready to go. I made some final tweaks and everything appears to be working perfectly. I had to add a capacitor to the signal line on the kitchen sensor because I was getting...
Forum: Appliances & Gadgets 04-14-11, 03:04 PM
Replies: 76
Views: 95,683
Posted By Daox
Yep, I gotcha. As I mentioned earlier, I was...

Yep, I gotcha. As I mentioned earlier, I was thinking of adding an outdoor sensor.

I will definitely post code once I have everything working.
Showing results 1 to 25 of 32
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