Hello,
I'm trying to control a tft lcd screen with an Arduino nano, i have seen examples where SCL and SDA are connect to D13 and D11, or are they meant to be connected to A4 and A5. Also am i meant to use any resistors?
Thanks.
lcd screen: 1.44Inch TFT Display Module LCD Display Screen 128RGB x 128 Resolution Serial Peripheral Interface for Arduino : Amazon.com.au: Computers
Given the presence of a CS pin, it's almost certainly SPI rather than I2C. So the display's SCL will go to the Nano's SCK (13) and the display's SDA will go to the Nano's MOSI (11).
Also, the page you linked to states Input Data: Serial Peripheral Interface.
I don't see any level level converters on the back of that display, so 3.3V is the way to bet and add your own level converters.
Ouch. You may be using 3.3V power, but you're still sending 5V signals. Good bye little display. If not now, then soon.
what value of resistors should i use then?
You'd have to ask someone else about that. When I do level shifting I don't generally go the voltage divider route. I'll use 74AHC125s or the like.
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