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1  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: February 04, 2013, 06:03:09 am
Does anyone think they know why the display is extremely blue?

Nathan
2  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: February 01, 2013, 03:10:54 pm
Hey everyone, I just thought I would make good on my promise to post a video of my screen working.



Here I have the SD demo uploaded into my Arduino showing a selection of .RAW images.

Unfortunately.. for some reason the screen is very blue :S is has been like that since I got it working.

I have also replaced the jumpers with nice and neatly arranged and tidy Male to Female cables that came in the post today smiley If you live in the UK and you buy a lot of stuff on eBay then 4tronix_uk are a fantastic eSeller. Extremely helpful, courteous and efficient. I hope its ok to say that on the boards, if not let me know and I will remove it from my post .

Nathan
3  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: January 31, 2013, 03:57:29 pm
The noise you are getting is quite common when you are feeding the 3.3v TFT controller with 5v signals....

There is actaully a reason why there are resistors or level translating ICs on the adapter shields.

/Henning

Even if I run the LED-A through a resistor it is still the same though.

Anything I can do to prevent it without having to use a cumbersome shield that prevents access to the unused pins?

Also on another note, I have a load of 74HC595 Shift Registers, is there any way to use these to reduce the number of pins that the screen requires?

Nathan
4  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: January 31, 2013, 09:40:59 am
Yeah its noisy alright.

If the RD pin is connected to 3.3v, then it is fine. The odd occasion I have had noise on my screen, was due to a loose wire.

When the screen is running and goes noisy, gently press the wires in ( if not soldered ) and see if the noise goes away or changes with your touch.

Hmm that is strange as my RD pin is connected to 3.3v..

I have ordered some more Male to Female jumper leads with the square housing.. So hopefully if there ARE any loose connections due to the circular jump leads then they will be fixed by the new square ones.

I will keep you all updated and hopefully once I get the new Male to Female leads i will be able to use the touch screen and SD slot too.

Nathan
5  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: January 31, 2013, 04:24:19 am
PS. Having just read another topic on the same TFT screen, I think the most appropriate work for describing what is happening on screen is it becomes extremely 'noisy'.

Nathan
6  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: January 31, 2013, 03:46:08 am
Once again excuse the n00bie-ness but what do you mean by RD is pulled High?

Obviously I know what you mean by RD as you are referring to the Pin that is going to the 3.3v point on the Arduino.

Best regards,

Nathan
7  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: January 30, 2013, 06:28:37 pm
I apologise for the double post but here is a video as promised.

For some reason the screen has developed a screen flickering.. Does anyone else have this problem with the LCD? Or does anyone know how to solve the problem?

Below is the youtube link to the video.



The touch screen is not yet working and neither is the SD slot. For now I am happy to get all the kinks out of the LCD display.

Kindest regards,

Nathan
8  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: January 30, 2013, 11:33:05 am
Thanks a bunch smiley

I will let you all know how I get on.

I will try to upload a video showing my progress. I am also currently compiling a document that will contain the pinouts, diagrams and basic setup to use this screen with a generic setup rather than the demo's.

Thanks again for all of everyones help.

Nathan
9  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: January 29, 2013, 10:27:23 am
Thank you so much Thomas02!!

I got it to display the demo! smiley-grin
10  Using Arduino / Displays / Re: ANOTHER Sainsmart 3.2" TFT Screen topic.. on: January 29, 2013, 09:10:08 am
Excuse my newbieness but how on gods green earth am I meant to be able to read that haha!! smiley-razz
11  Using Arduino / Displays / ANOTHER Sainsmart 3.2" TFT Screen topic.. on: January 29, 2013, 08:14:00 am
Hi there,

I like many many MANY other people seem to be having problems with this screen.

I have tried pretty much every resource available and I cannot get the thing to display anything other than the LED backlight..

I am positive that it is simply me being a complete n00b but I could really use some help with this screen.

My specific situation -

Libraries installed:

UTFT.h
ITDB02.h
ITDB02_Graph16.h
ITDB02_Touch.h

Arduino being used: Genuine Arduino Mega2560

I do NOT have the shield for this screen I am simply trying to connect it up using the pins.


Every place I look seems to have different pinouts for the libraries and quite frankly I am confused as anything right now.

the ebay link I bought the screen from is as follows:
http://www.ebay.co.uk/itm/280920642812?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

From this listing I have the following information:

Specification:
240374PQ
65K color
320*240
3.2 inch
Wide viewing angle
SSD1289:240 RGB x 320 TFT Driver
Integrated Power, Gate and Source Driver With RAM
ADS7843:4-WIRE TOUCH, UP TO 125kHz CONVERSION RATE, SERIAL INTERFACE

Though I am not sure how much of that will be of use.

I really hope someone can help me getting this to work.

For now I would be happy if I can get get the screen to output information and print out text. I am not overly bothered about the Touch capability or the SD card reader right now.

Nathan smiley
12  Using Arduino / Project Guidance / Diode Choice for Quadcopter protection on: April 03, 2012, 03:27:14 pm
Hi everyone!

I am very new to both the Arduino world and the world of electronics and RC control. I am a 2nd year Aerospace Engineering Student at University and would love some help with the selection of components for the electronics side of the 'copter.

Having studied Mechatronics I am aware of the back EMF phenomena. I am also aware that there is a need for a diode in the circuit to protect the arduino from it. I know that diodes allow current and voltage to flow in one direction (hence why they are useful for protection in the circuit). However I am unsure as to which diodes to use.

I will be using the Emax CF2822 motors, the data sheet can be found here:
http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CEkQFjAC&url=http%3A%2F%2Fwww.rcworld.com.au%2Fmedia%2Fdownloadspdf%2FE%2520MAX%2520%2520-%2520E%2520Max%2520Brushless%2520Motor%2520Specs%2520EE%2520July%252008.pdf&ei=Ill7T7f6GKfA0QXI4JSeCQ&usg=AFQjCNHP_P4OYSJW5vi9W9LT4ybsKsqHIQ

however I can tell you that the motors have the following characteristics for quick reference:

Voltage max: 11.1v
Continuous Current: 14.5A
Max Current: 16A for 60 seconds.

I will also be using 30A ESC's with each of the motors.

These are the ESC's I have purchased:
http://www.ebay.co.uk/itm/251004421392?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649#ht_2671wt_1166

I hope that someone will be able to give me an answer.

Kindest regards,

Nathan
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