Hi
Please confirm that you have an Arduino Mini 5V.
Assuming you have a Arduino Mini 5V:
- Jumper our USB to 5V
- Connect 5V power supply to VCC of the Arduino Mini
- Connect 5V power supply to VCC of the Display
- Connect 5V power supply (best via 47 Ohm resistor) to your Display (PIN BL)
Background: The display has two different power inputs (BL and VCC). The Arduino Mini also only has a power input, so connecting the display to the Arduino Mini does not make sense.
A picture of all the wiring (display + Arduino Mini + usb power supply) still would be helpfull.
PIN 5v....There are via holes on the end of the board marked V and G. V = 5v and G = ground. I use these as an additional power and ground.
Does not make sense, because you told that the Arduino is powered from the 5V USB power supply, so the Arduino Mino can not provide power.
The back light goes to the one marked V.
Does not make sense to me.
I am powering the the Pro mini from my PC USB thru a FT232RL USB to Serial adapter module USB TO 232
So, where does the power goes to?
I do have a variable power supply and I have powered just the back light at 3.3v but this did nothing.
Even no light? Providing power to the BL pin will turn on back light. Nothing else!
I uncommented that line and loaded the sketch and get the same result....white screen.
I think your power setup is wrong, but you simply do not provide enough information about your actual powersetup.
Oliver