Archive for the ‘remote control’ Category

Touch me touch me

Wednesday, June 30th, 2010

On a more positive note; a package out of Thailand has arrived. Inside was a 2.8″ TFT display with touchscreen. I’m quite happy with this because it was a bit of a gamble. It comes from rftechworld and was the cheapest I could find (ignoring the fact that I love ordering stuff from unknown places all over the world ;)). Something I could not find was any information regarding them, it could have turned out to be a scam. But to my delight it all worked out fine and I will certainly place another order with them when needed.

The display was shipped in a very joyful padded envelope (take a look at the Thailand Post website and you know what I mean). This may sound scary, but the display itself was packed in a sturdy clear plastic case. Totally unexpected, but very welcome protection.

Another surprise comes in the form of pinout. According the website and provided documents you get either a hardwired 8-bit interface of 16-bit interface. But this is not what arrived. Instead all needed pins are made available and you can select how many bits you need by connecting mode pins to GND or Vdd.

This component goes into the remote control unit. For now it’s screen + breakout board for easier development, but the screen can also be gotten without the PCB attached to it. Resolution is 240×320 which should be more than enough for this project whilst being small enough to fit in the palm of your hand. Required power is 2.8V typical, but 3.3V is within spec. The display has a Sitronix ST7781 controller (262K colours) and the breakout board comes with AD7873 touchscreen digitizer assembled.