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1  Using Arduino / Displays / Re: 1.8 SPI TFT from ebay - problems on: February 27, 2013, 01:16:41 pm
Hi,

Thanks for your reply, it works rewired!

Youre wellcome!
Does the background flicker?

I dont know how to use the SD card, never tried that. Please open another thread for this.
2  Using Arduino / Displays / Re: 1.8 SPI TFT from ebay - problems on: February 26, 2013, 10:59:14 am
I have a 1.8 SPI TFT also from ebay, but my problem is that I have a 16pin pcb.

This is exactly the one I have. You can use the wiring table above.
The mega requires slightly different wiring, because the hardware SPI is on different pins. Just read the comments in the adafruit example sketch, it is explained there.

Can you test the example sketch? Do you experience the same issue than me?

3  Using Arduino / Displays / Re: 1.8 SPI TFT from ebay - problems on: February 24, 2013, 06:02:38 pm
Hi,

the 3.3V jumper is open, I use 5V from the arduino board (which is connected to USB). I connected the backlight via 1K resistor to +5V.


Wiring:
Arduino pin     TFT  module Pin
8 rst              6  rst
9 dc               7 A0
10 cs             10 cs
11 mosi          8  SDA
13 sclk           9 SCK

Then I used the graphicstest_highspeed example from the Adafruit_ST7735 library.

Sorry, I got no link to the module.


4  Using Arduino / Displays / 1.8 SPI TFT from ebay - problems on: February 22, 2013, 04:57:43 pm
Hi,
I got a HY-1.8 SPI display board from ebay. I uses a ST7735 chip, so I can use the adafruit ST7735 lib which works in general. I used the graphics demo sketch with hardware SPI.
The issue I have is that the screen background (not the backlight) becomes brighter when data is written. I suspect the CS line to do this because I unplugged the serial data line and still the background gets brighter at the moments of access. Did anyone experience the same problems? Is this an issue with the TFT?

thanks!
5  Using Arduino / Project Guidance / Newbie question: interfacing with external serial devices on: April 13, 2011, 02:38:34 am
Hi,
as I know, the serial pins 0 and 1 are connected to the usb to serial converter on the arduino board (duemilanove in my case).

Is it possible to use these pins to communicate with an external serial device (19200 to 57600 baud read and write, ttl level) when the arduino board is not connected to the pc, or does the usb/serial converter chip has to be disconnected somehow?

Thanks!
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