Arduino and two elements - Page 3 - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > DIY Projects > Brew Stands > Arduino and two elements

Thread Tools
Old 06-12-2012, 06:21 PM   #21
May 2012
Klamath Falls, Oregon
Posts: 13
Liked 1 Times on 1 Posts

Originally Posted by GriFF3n View Post
The arduino will be connected to a temperature probe. The program will monitor the probe and send a control to turn off the elements once the desired temperature is reached. Thats the function of this project. Adding a PID controller is a great idea, I just don't know how to do it.
I think I get it, however your using sledge hammer to nail in decking, while it'll get the job done, its the expensive and under-utilized way of doing things.

Just so I have it clear, your using the ardino to set a temperature at which to turn a single relay off while keeping the second heating element on? I believe you'd be much more satisfied with using a PID control set up.

Pulse Width Modulation is a technique where by varying the % you have the heating element on you can control how much heat actually goes into the kettle. PID is a control algorithm used to adjust how much heat to put in based on the Temperature probe.

While you can go out and buy a dedicated PID controller and it may be the easier option in this case, you can program the arduino to act just like that PID controller.

Reply With Quote
Old 06-12-2012, 06:36 PM   #22
Jul 2011
Richardson, Texas
Posts: 1,025
Liked 56 Times on 45 Posts

There's actually an Arduino library for floating-point PID control. I don't like it and I think it's slow and overkill, but you don't have to write your own PID algorithm, even with the Arduino.

Because of the system response times involved, I think that simple thermostat control (like my pseudo-code-example) is sufficient for all brewing purposes.

Reply With Quote
Old 06-18-2012, 10:41 PM   #23
Senior Member
mendesm's Avatar
May 2012
Bedford, Massachusetts
Posts: 307
Liked 44 Times on 27 Posts

What' the PWM frequency for driving one of the 220v/5000w heater elements?

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Arduino instead of BCS or Brewtroller OEHokie Brew Stands 75 06-17-2014 03:37 PM
Arduino, now what? CoalCracker DIY Projects 27 01-10-2012 12:40 AM
Looking for some help with an Arduino Keezer goaticus Kegerators & Keezers 6 05-08-2011 03:46 AM
Project Box for Arduino BulldogBrewer Brew Stands 0 09-30-2010 08:27 PM
Arduino for PID? rockytoptim Brew Stands 2 12-25-2009 03:51 PM

Forum Jump