solar tracker controller

[CIRE]

hello to all in the forum!
I'm new here in the forum and starter in this picbasic programming. please anyone could help me to rewrite this code.
I just added this two lines to the original code and it won't work.
the portb.0 and portb.1 connected to the H bridge.

if PORTA.1 = 0 then face_east   'limit switch1 
if PORTA.2 = 0 then hold     'limit switch2      

****************************************************

@ DEVICE PIC16F84,WDT_ON,PWRT_ON,PROTECT_OFF
INCLUDE "bs1defs.bas"

start:
low PORTB.0            'pin portb.0 low 
low PORTB.1            'pin portb.1 low 
Pot PORTB.2,255,b0        'read first cds sensor
pot PORTB.3,255,b1        'read second cds sensor


if b0 = b1 then start        'if equal do nothing
if b0 > b1 then greater    'if greater, check how much greater
if b0 < b1 then lesser    'if lesser, check how much lesser

if PORTA.1 = 0 then face_east   'limit switch1
if PORTA.2 = 0 then hold       'limit switch2

greater:            'greater routine
b2 = b0 - b1        'find the difference
if b2 > 10 then cw        'is it within the range? if not go to clockwise/ solar panel facing west
goto start            'if it is in the range,do it again

lesser:                            'lesser routine
b2 = b1 - b0                    'find the difference
if b2 > 10 then ccw          'is it within the range? if not got counter clockwise/solar panel facing east
goto start                   'if it is in the range, do it again

cw:                          'turn the motor shaft clockwise / solar panel facing west
high PORTB.0                 'pin portb.0 high / facing west
pause 100                    'let it turn for the moment
goto start                   'check again

ccw:                         'turn the motor shaft counter clockwise/ solar panel facing east
high PORTB.1                 'pin portb.1 high/ solar panel facing east
pause 100                    'let it turn for the moment
goto start                   'check again

face_east:                   'facing east
low PORTB.0                  'pin portb.0 low  /stopping the solar panel for moving
low PORTB.1                  'pin portb.1 low  / stopping the solar panel for moving
sleep 14400                  'wait for 4 hours 
high PORTB.1                 'pin portb.1 high /solar panel back facing east ready for next day sun shine
sound PORTB.4,[124,12000]    'tone
pause 1000                   'wait for 1 sec
goto start                   'check again

hold:                        '
low PORTB.0                  'pin portb,0 low / stopping the solar panel for moving
low PORTB.1                  'pin portb.1 low / ----- do ----
sleep 3600                   'wait for 1 hour 
goto start                   'check again
end

'Copied from pic microcontroller project book by John Iovine

[Dave]

For starters CIRE what is the code not doing? Next, what are the settings for PORTA? Input or Output?

Dave Purola,

[CIRE]

hello Dave!
The PortA.1 and PortA.2 is the input which is connect to a limit
switch. Pulled up by 10 Kilo ohms, when PortA.2 is in 0/ground, it should be stop. After 4 hrs. it will turn back to original position(panel facing east). PortA.1 is also a limit switch,on reverse function. The original title of this code is Light tracker and it's working well, when I added the line . won't work anymore.
" if PORTA.1 = 0 then face_east 'limit switch1"
" if PORTA.2 = 0 then hold 'limit switch2 "
Yes, the code compiled in Picbasic Pro 2.44

[anj]

Gday CIRE
One possible problem and one definite.

...................
Pot PORTB.2,255,b0 'read first cds sensor
pot PORTB.3,255,b1 'read second cds sensor


if b0 = b1 then start 'if equal do nothing
if b0 > b1 then greater 'if greater, check how much greater
if b0 < b1 then lesser 'if lesser, check how much lesser

if PORTA.1 = 0 then face_east 'limit switch1
if PORTA.2 = 0 then hold 'limit switch2
.......................

1) possible
in yr above code, if bo=b1 you will loop endlessly. Try getting an LCD to output the actual bo and b1 values, to see what you are actually getting

2) definite
The three "if B0.. " lines cover all options, and result in branches to other labels in the program
as such the two lines you added can never be reached and therefore will never be executed. Hence have no effect on basic program you started with.
Andrew

[CIRE]

Hello there Andrew!
Thank you for your response and I am tried to get the idea.Well
I have 1 week to go for the coming 2m & 70cm DXing contest. Enclosed the schematic diagram. Surely when I turn to 60yrs. I'm
expert in this like the others and you,hi hi hi.

[mahendiran]

Hello there Andrew!
Thank you for your response and I am tried to get the idea.Well
I have 1 week to go for the coming 2m & 70cm DXing contest. Enclosed the schematic diagram. Surely when I turn to 60yrs. I'm
expert in this like the others and you,hi hi hi.

hello friend,
pls send me the code for solar panel tracking system, this is my mail id ([email protected])

[Ioannis]

Here it is:

http://www.picbasic.co.uk/forum/cont...-Solar-Tracker

Ioannis

[anj]

Gday Cire
60? whats that.
Looking at yr diag, i assume the limit switches are used to set the amount of travel for the tracker.
So operation would be

start pointing east
track sun during day
when hit west limit switch stop tracking and wait for sun to go down
quickly slew back to east until hit east limit switch
wait until light again
repeat process

if this is the case i would do this
move the new call to stop tracking so it is checked before anything else
delete the other call to "hold" routine
................
start:
low PORTB.0 'pin portb.0 low
low PORTB.1 'pin portb.1 low

if PORTA.1 = 0 then face_east 'limit switch1 <- move to here

Pot PORTB.2,255,b0 'read first cds sensor
pot PORTB.3,255,b1 'read second cds sensor
................
modify new routines

face_east: 'facing east
low PORTB.0 'pin portb.0 low /stopping the solar panel for moving
low PORTB.1 'pin portb.1 low / stopping the solar panel for moving
sleep 14400 'wait for 4 hours
high PORTB.1 'pin portb.1 high /solar panel back facing east ready for next day sun shine

'Add this next bit to wait until east limit switch closes
' dont go back to start, do all here
hitsw:
if PORTA.2 = 1 then hitsw 'loop until you have hit the switch
'note, now use = 1, ie while sw is open, just keep slewing until it closes
low PORTB.0 'pin portb,0 low / stopping the solar panel for moving
low PORTB.1 'pin portb.1 low / ----- do ----
sound PORTB.4,[124,12000] 'tone

sleep 3600 'wait for 1 hour
goto start 'check again
end

Andrew

[CIRE]

Hello Andrew!
60yrs? Hmmm.. When I reach 60 years old, might be an expert on this field like the others and you!
You got the idea on two limit switch'coz the Solar Panel frame I've made is limit to 45 degrees east and 45 degrees west.
Disregarding the
"if b0 = b1 then start 'if equal do nothing
if b0 > b1 then greater 'if greater, check how much greater
if b0 < b1 then lesser 'if lesser, check how much lesser
and other supporting lines will turn the motor on high speed
back and fort direction. The idea of like "SUN Flower" makes no sense at all. What do you think? (pardon my bad english)

[ultimatekiller]

Hi all,
I m a new member... and i m now doing a same project too... named "PIC microcontroller solar tracker"... Does anyone has the circuit or schemetic of the solar tracker?? and some explanation of the circuit?? i need that badly... Thx...


Regards,
Ultimate Killing Machine

[muzakyo]

hello
can anyone check my proramming
i am doing the same project.....

solar tracker
pic 16f877
2cds with dc motor

v1 var byte                       'variable v1
v2 var byte                       'variable v2
v3 var byte                    'variable v3


TRISA = 1                       'Set all PORTA pins as inputs
TRISc = 0                     'Set all PORTc pins as outputs

start:

pot porta.0,255,v1             'Read 1st CdS Sensor (east)
pot porta.1,255,v2            'Read 2nd CdS Sensor (west)

if v1 <= 230 then skp        'start program
if v2 > 230 then slp        'is it dark enough to sleep? (sleep mode)

skp:
if v1 = v2 then start        'If equal, do nothing
if v1 > v2 then greater        'If greater, check how much greater
if v1 < v2 then lesser        'If lesser, check how much lesser

greater:                    'Greater routine
v3 = v1 - v2                  'Find the difference
if v3 > 10 then cw             'Is it within range? If not, go to cw
goto start                    'In range do again

lesser:                        'Lesser routine
v3 = v2 - v1                'Find the difference
if v3 > 10 then ccw            'Is it within range? If not, go to ccw
goto start                    'Do again

slp:
low portc.0                       'stopping the solar tracker for moving 
low portc.1                    'stopping the solar tracker for moving
goto start 

cw:                            'Turn the sensor array clockwise
high portc.o                  'Turn on h-bridge
pause 100                     'Let it turn for a moment
goto start                    'Check again

ccw:                         'Turn the sensor array counter clockwise
high portc.1                   'Turn on h-bridge
pause 100                     'Let it turn a moment
goto start                    'Check again

end

[Dave]

Muzakyo, I don't see where the motor is commanded to stop.. Must operate like a windshield wiper unless it's asleep?

Dave Purola,
N8NTA

[muzakyo]

i am a newbie in pic......

but from the proramming the motor will run for a certain time (100 miliseconds) and then it will get back in the start loop....

for the motor i am not sure.... but when i compile it there are no problems.

did i need to do like the slp: programming..?

for this program i refer to the pic microcontroller project book by John Iovine and pic robotic : a beginner's guide to robotic by john iovine... (first post)

[Dave]

muzakyo, I don't see anywhere in your code that you are stopping the motor if your system is "on target". You need to place some kind of DEAD BAND limits that are within the ON TARGET criteria. I mean +- so many counts... You should have at least 4 states, 1 for sleep (waiting for next morning), 1 for going east, 1 for going west and 1 for stop during the day when system is on target.

Dave Purola,
N8NTA

[manjunath000]

hello can anyone uplode the programme for single axis solar controller pl...................

[ScaleRobotics]

Here is one example:

http://www.picbasic.co.uk/forum/cont...-Solar-Tracker

[manjunath000]

post the entire reports.....including circuit desgin and value of resistors and all plz..............(solar tracker)

[ScaleRobotics]

post the entire reports.....including circuit desgin and value of resistors and all plz..............(solar tracker)

He does post the schematic. The resistors look to just be pull ups. Pick a good pullup value, and you should be good. Most people don't post their board drawings, but I suppose it doesn't hurt to ask

[ozarkshermit]

post the entire reports.....including circuit desgin and value of resistors and all plz..............(solar tracker)

If you read the schematic, you will see in the bottom right hand corner that all resistors are specified as 10K, 1/4 watt

[bguruk85]

please send the programmming codes
circuit pdf link is http://www.journalagent.com/z4/downl...un=PAJES-58538
two axis automatic solar sun tracking using pic ic and stepper motors,pleasesend program c codes

[Ioannis]

One more and you are off the board...

Ioannis

[amilaae]

please send me circute...

[artckp]

please send circuit solar tracker