Hi Peter,My idea is to use an old oven heater like the picture. With respect to the PID controller, maybe it is cheaper to do it manually, without writing code. I want us to design a 2 meters long oven, containing two heaters and two fans (for example). What I intend by this?, I want to save the maximum possible power. So with small parts, we only use medium oven > Date: Sun, 29 Jun 2014 18:07:13 -0400 > Subject: [SS2S-Main] Re: temperature controller with arduino > From: rockets4kids@xxxxxxxxx > To: sugarshot@xxxxxxxxxxxxx > > On Sat, Jun 28, 2014 at 6:30 PM, Vicente Alvero Zambrano > <vicente_alvero_14@xxxxxxxxxxx> wrote: > > > I've seen this diagram on Internet (see image). > > Thoughts? > > This is the standard wiring diagram for a system like this. You can > clearly see that it is composed three distinct items: > > 1. The heater (box and heating elements) > > 2. The controller (including one or more temperature sensors) > > 3. A solid-state relay. > > It is difficult to tell if you are asking for someone to provide all > three parts or just the controller. > > I will point out that the heater itself at the size you are asking > will almost certainly represent the greatest cost of materials unless > they can be sourced from scrap. I imagine that the cost of shipping > such a device could approach (or even exceed) the cost of materials. > > There is a fourth item somewhat hidden in here: The software that > allows the user to develop the temperature profile. Implementing a > PID loop to maintain a constant temperature on a microcontroller is a > trivial task. Developing software which will allow the user to edit a > temperature profile is very much a non-trivial task. > > -p. >