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Posted by Curbie on December 5, 2012, 2:26 am
 


I use the Arduino also (more about that later), but Mike's post caught
my eye, if you're way more comfortable programming in BASIC are not
comfortable programming in C, I'm told there are other "Arduino like"
alternatives which use BASIC that have their supporters, I've only
ever used the Arduino.

The Arduino we did has an LCD, 4 control buttons, 3 DS18B20
temperature sensor and controls:
1.  Heater control (AC electric heater; SSR control - on/off)
2.  Water feed control (DC motor fixed speed pump - on/off)
3.  Beer feed control (Parastaltic pump run by variable speed stepper
motor - step pulses or motor winding phases)
4.  Reflux control (solenoid controlled valve - on/off)
5.  Alarm (relay control - on/off)
6.  Alert (piezo buzzer - pulsed to create beep, or on/off
continuous).

Here's a picture:
http://i825.photobucket.com/albums/zz177/Curbie_Pics/Controller.jpg

It's open source and would make a fine differential controller as is
if you rewrote the control software section.

I can find the on-line link if you're interested, there is also an
custom sheild board for all the I/O avaliable.

Curbie


Posted by j on December 5, 2012, 10:25 am
 
On 12/4/2012 9:26 PM, Curbie wrote:> On Wed, 28 Nov 2012 14:00:22 -0500,

I don't have a problem with C. It's just more tedious to have to compile.


I'm impressed! And I like the off the shelf box you used!

I see the 10 bit A/D has no problem reading temps to a .1F. I don't need
that much  accuracy.

Sure. I'm juggling money at the moment and it'll be a week before I buy.
It's like Summer!


Jeff



Posted by Curbie on December 5, 2012, 2:45 pm
 Jeff,

I haven't gotten around to a diiferential controller yet, but it's on
the todo list.

The DS18B20 temperature sensors have a .5C or 1F accuracy with a 10
bit resolution and cost about $.75, the point being, that they're not
that much more expensive for those that don't need that much accuracy
and resolution, but have the accuracy and resolution for those who do.

It's pretty easy to convert the same controler for or between
different funtions we use them for fermentors, incubators, feedstock
processing, all with a software change. (the funtion control section
of the software) The software that controls all devices is always the
same.

http://www.liquidsunenergy.com/controller/controller.html

Curbie


Posted by j on December 5, 2012, 10:14 pm
 On 12/5/2012 9:45 AM, Curbie wrote:

<snip>


Where do you get them for that price?

What I would like to do is run cat5 throughout the house and outside
also. Is there a limit on how far you can run a one wire?

Jeff

Posted by Curbie on December 5, 2012, 11:19 pm
 

http://www.taydaelectronics.com/ic-integrated-circuits/temperature-sensors/ds18b20-1-wire-digital-temperature-sensor-ic-dallas.html
All the parts links are in the manual. Which is quite good.


10 meters for the temperaure sensor one wire bus (I think, it's been a
while) I up to 8 sensors per bus (I think).

Curbie

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