PAGE 2 of 7 - The Software
The Updated Software for the Pid Controll
Set is the temperature ( 395 for 39.5 celsius )
Temp is the actual temperature
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#define MinPID -5000
#define MaxPID 5000
#define MaxDIM 50
MinDIM = 2 * AC_Freq * 100; // 2*50*100 = 10000 microseconds
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Error = Set - Temp;
P = Kp * Error;
I = Ki * Total_Error;
D = Kd * ( Error - Previous_Error );
PID_out = P + I + D;
Total_Error += Error;
Previous_Error = Error;
PID_out = (PID_out - MinPID) * (MaxDIM - MinDIM) / (MaxPID - MinPID) + MinDIM;
if ( PID_out < MaxDIM ) PID_out = MaxDIM;
if ( PID_out > MinDIM ) PID_out = MinDIM;
Dim = PID_out;
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PID_out = (PID_out - MinPID) * (MaxDIM - MinDIM) / (MaxPID - MinPID) + MinDIM;
this line actually maps the PID_out from a range of
[ MinPID, MaxPID ] to a range of [ MinDIM, MaxDIM ]
The frequency mesurement
The uC measures the time that it takes to capture 256 zero cross
and then calculates the AC mains frequency like that
AC_Freq = 128000 / ( Stop_time-Start_time );
Stop_time - Start_time = the time in milliseconds that took to capture 256 zero crosses
128000 and not 256000 because on each period we have 2 zero crosses
Comments
At 22 October 2014, 21:55:20 user Luis wrote: [reply @ Luis]Greetings, congratulations on the project, I would like to experiment with this design but do not get the atmega328, I only get the atmega8 or ATmega88, too much to ask that you compile the program for one of these microcontrollers, Thanks.
At 21 May 2014, 16:49:31 user bob dillard wrote: [reply @ bob dillard]i just use a mercury thermostat, tilted at an angle to compensate for the higher temperature required for incubation. now a timed egg roller is something i would be interested in.
At 6 March 2013, 20:39:42 user nikki81 wrote: [reply @ nikki81]Are there any PCB design files for this project ?
At 28 August 2012, 21:24:09 user Markus wrote: [reply @ Markus]HI hi
I did somthing very similar, i tested it with a light bulb that dims
Just a quick question, i would like to read this "controlled wavform" back into a plc/labview. How would you suggest this be done ?
Thanks
At 17 April 2012, 6:00:27 user Giorgos Lazaridis wrote: [reply @ Giorgos Lazaridis]@Hercules Trapierakis you've turned your parrot into a carnivore!!! DAMN
At 17 April 2012, 5:39:50 user Hercules Trapierakis wrote: [reply @ Hercules Trapierakis]@Panagiotis Kalogeris
This is George
http://www.youtube.com/watch?v=O_Mg3CoALcE
http://www.youtube.com/watch?v=U6yn3dX0beM
there are not to many eggs
it's not even half filled
Not but you can use it here and on America without change the firmware
At 16 April 2012, 20:29:09 user Panagiotis Kalogeris wrote: [reply @ Panagiotis Kalogeris]Hello hercules nice project of yours!!!!!!!
First of all what you intend to do so many birds?Hope to sell them because believe me i have 2 parrots and the one of it is a REAL PAIN IN THE ASS!!!!!Fantastic pcb did you develop it by yourself?Also you say that the circuit reads the ac frequency and it sets the dimmer parameters accordinally.Why is that?I mean the mains frequency isn't stable to your house?
That's for start keep going :-) !!!!!!!!!!!!
At 16 April 2012, 16:04:33 user Giorgos Lazaridis wrote: [reply @ Giorgos Lazaridis]@herctrap poor bird...
You did not have something to do with the explosion,,,, did you???
At 16 April 2012, 15:21:56 user herctrap wrote: [reply @ herctrap]yes i have changed the lamps from 40W to 60W
The main power transformer near my house blown up two days before the incubation
so the bird died from the cold
At 16 April 2012, 14:39:34 user Giorgos Lazaridis wrote: [reply @ Giorgos Lazaridis]Herctrap, the writeup is excellent and the PCBs are awesome! The only thing that i am afraid of is this "overkill" temperament of yours... I hope you have installed the correct heating lamps, and that the birds that will come to life will not be roasted :D You did not change the lamps that your grandfather installed, did you :D
What happened with the single egg incubator project? Will you develop the first "chicken of the tube" or not? |
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