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1  Community / Exhibition / Gallery / Re: arduino dual axis solar tracker on: January 11, 2014, 03:45:58 pm
thanks for the reply,

SO i consider  azimuth  angle need to be if tracker will move in horizontal axis, elevation / altitude  angle for the vertical axis.
any other point need to be considered like Seasonal change ,shadow length during coding  while calculations.

DO you know any link which gives information on calculating backtracking algorithms to avoid shadowing,increase efficiency

If i wanna run Nrel code. Which controller is best in arduino.           http://www.nrel.gov/midc/spa/


I think that when we track sun position based in calculations we don't need to use seasonal correction, cause calculations are based in time and day of the year.

I don't know any backtracking algorithms to avoid shadows. Try to place your trackers where there are no physical shadows, and away from each other.

Nrel code is very accurate, but i dont think its needed for photovoltaic panels solar tracker, since you lose 1% of direct suns power at 8 degrees misalignment.

Keep things simple.
2  Community / Exhibition / Gallery / Re: arduino dual axis solar tracker on: January 10, 2014, 01:51:35 pm
Well i am not sure if i understood your questions, but i hope i can help you.

You need to calculate the two angles of the sun, azimuth (horizontal) and elevation (vertical). they depend from time (day of the year, time of the day) and the coordinates (longitude, altitude) that you are.

Also you need to measure the angles of the two axes of the tracker (horizontal, vertical). the tracker must face South 180 degrees (for the North Hemisphere).

Every time you calculate new angles, you must turn tracker.

For any further questions please contact me to my email kostas@kokoras.com
3  Community / Exhibition / Gallery / Re: arduino dual axis solar tracker on: January 09, 2014, 11:33:26 am
Ok, sorry, you are right.

Now its working.

Please check again

http://kokoraskostas.blogspot.com/2013/12/its-solar-tracker-project-with-arduino.html
4  Community / Exhibition / Gallery / Re: arduino dual axis solar tracker on: January 07, 2014, 04:02:07 pm
Can some one share me formula evolved in construct Dual axis tracker

Why don't you check out my blog post ?

http://kokoraskostas.blogspot.gr/2013/12/its-solar-tracker-project-with-arduino.html
5  Community / Exhibition / Gallery / Re: arduino dual axis solar tracker on: October 13, 2013, 01:33:40 pm
MOVED

http://kokoraskostas.blogspot.com/2013/12/its-solar-tracker-project-with-arduino.html
6  Community / Exhibition / Gallery / Re: Arduino Bluetooth R/C Car on: October 13, 2013, 01:31:55 pm
MOVED

http://kokoraskostas.blogspot.com/2013/12/arduino-bluetooth-remote-control-car.html
7  Community / Exhibition / Gallery / Re: Arduino OBDII Bluetooth Car Engine RPM Shift Light on: July 19, 2013, 11:51:15 am

PS. i dont think we need a reset pin, at all. I see yours is commented out.

Correct, i dont need to reset before and after entering AT command mode, because,if i remember correct, i use for communication mode 38400 baudrate which is the same as AT command Mode, please check datasheet for confirmation.
8  Community / Exhibition / Gallery / Re: Arduino Bluetooth R/C Car on: July 17, 2013, 04:59:15 pm
Ok i uploaded all up here

http://www.kokoras.com/BluetoothRCcar/
9  Community / Exhibition / Gallery / Re: Arduino OBDII Bluetooth Car Engine RPM Shift Light on: July 17, 2013, 04:56:46 pm
hello mr. Kostas Kokoras  (Thanks for sharing)
I'm attempting the same thing. then when working ,  modify it to my usage,  MPG.   (Per my link)  its dedicated BT master, like yours.  (very few examples in the net doing this app)
http://www.fixkick.com/ELM327/taurus-sim/hacked.html#MPG
My board is not the HC05 ( but mine has CSR-BC417143 inside , like yours i think) mine is the Seeed BT shield. the model 3030 (i call it my Winchester)  .
I think i can get it to work if , I had your schematic from your hc05 to arduino pins.
 then i can work it all out to the seed.  Can i have your schematic? or a pin list?

i wish to thank mr. Aestrad for the MAC setup.  methods.  (not tried this yet, but do have the usb-to TTL232 adapter)
I tried the test ATRZ,  above , it don't work  i guess you use pins 7 and 8 for rx/tx.  the seeed uses 7(rx) and 6 (out of box)  , my guess, is he already had the mac setup. first, right? for this test?

I have a ECU emulator in my shop that connects to a ELM BT.  (a car free setup for testing...)  I do know how to use ELM command sets and the OBD2 comm rules,  all i need is getting this seed up..

thanks again.




OK, let me see if i understand what you are asking
the pins of arduino i use for connection with HC-05 is
Arduino pin 7 connected to Tx of HC-05
Arduino pin 8 connected to Rx of HC-05
Arduino pin 9 connected to Reset of HC-05 (reset with LOW)
Arduino pin A2 connected to PI011 of HC-05 (enter AT Mode with HIGH)

then i set the HC-05 to AT Command Mode set it as master and establish a connection with the Bluetooth OBDII ELM adaptor.
then i set the HC-05 back to Communication Mode.
After that u can send AT Commands to ELM.
Check my code http://www.kokoras.com/OBD/Arduino_HC-05_ELM327_OBD_RPM_Shift_Light.htm

Hope i helped.
10  Community / Exhibition / Gallery / Re: Arduino Bluetooth R/C Car on: June 30, 2013, 12:21:11 pm
Here is the code , please feel free to suggest or ask anything.

www.kokoras.com/BluetoothRCcar/Code.htm
11  Community / Exhibition / Gallery / Re: Arduino Bluetooth R/C Car on: June 22, 2013, 05:42:40 am

 @Kostas Kokoras

 Wonderful work on the schematics! Thank you for sharing! 

  One comment, your pins are labeled A0 through A10, although you are using an Atmega328... Should those numbers be D0 through D10?  The Uno board has A0 through A5 only.

Thank you  for your nice words.

The AA0 and A2 through A10 labels it is not the pins of Arduino Uno. It is the labels that connect the rest of the schematics with the Arduino schematic.
The actual pins of Arduino Uno is labels A0 and 2 through 10 where is by the lines starting from the rectangular that represents Arduino Uno.
I hope this clears out the labeling. Sorry for not beeing so clear.
12  Community / Exhibition / Gallery / Re: Arduino Bluetooth R/C Car on: June 21, 2013, 05:32:18 pm
Here are the schematics














13  Community / Exhibition / Gallery / Re: Arduino Bluetooth R/C Car on: June 14, 2013, 03:40:26 am
Very cooool! I like the "tong" at 1:40 smiley-wink

best regards
Andreas


it was the noise from the door hit. lol smiley
14  Community / Exhibition / Gallery / Re: Arduino Bluetooth R/C Car on: June 12, 2013, 11:36:37 am
I switched from L293D http://www.ti.com/lit/ds/symlink/l293d.pdf

to SN754410 http://www.ti.com/lit/ds/symlink/sn754410.pdf

cause it was getting a little hot.
15  Community / Exhibition / Gallery / Re: Arduino OBDII Bluetooth Car Engine RPM Shift Light on: June 11, 2013, 11:57:10 pm
Great Job almamater....
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