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.
The back light goes to the one marked V.
I am powering the the Pro mini from my PC USB thru a FT232RL USB to Serial adapter module USB TO 232 : http://www.ebay.com/itm/321327716609?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
I do have a variable power supply and I have powered just the back light at 3.3v but this did nothing. I have powered both the pro mini and the back light from at 3.3v, it did not work...same result except the screen was not as bright.
I uncommented that line and loaded the sketch and get the same result....white screen. Again when I remove the vcc the screen flickers but there are no graphics.
//Ucglib8BitPortD ucg(ucg_dev_ili9325_18x240x320_itdb02, ucg_ext_ili9325_18, /* wr= */ 18 , /* cd= */ 19 , /* cs= */ 17, /* reset= */ 16 );
//Ucglib8Bit ucg(ucg_dev_ili9325_18x240x320_itdb02, ucg_ext_ili9325_18, 0, 1, 2, 3, 4, 5, 6, 7, /* wr= */ 18 , /* cd= */ 19 , /* cs= */ 17, /* reset= */ 16 );
Ucglib_ST7735_18x128x160_SWSPI ucg(/*sclk=*/ 13, /*data=*/ 11, /*cd=*/ 9 , /*cs=*/ 10, /*reset=*/ 8);
//Ucglib_ST7735_18x128x160_HWSPI ucg(/*cd=*/ 9 , /*cs=*/ 10, /*reset=*/ 8);
//Ucglib_ILI9341_18x240x320_SWSPI ucg(/*sclk=*/ 7, /*data=*/ 6, /*cd=*/ 5 , /*cs=*/ 3, /*reset=*/ 4);
//Ucglib_ILI9341_18x240x320_SWSPI ucg(/*sclk=*/ 13, /*data=*/ 11, /*cd=*/ 9 , /*cs=*/ 10, /*reset=*/ 8);
//Ucglib_ILI9341_18x240x320_HWSPI ucg(/*cd=*/ 9 , /*cs=*/ 10, /*reset=*/ 8);
//Ucglib_ILI9341_18x240x320_SWSPI ucg(/*sclk=*/ 4, /*data=*/ 3, /*cd=*/ 6 , /*cs=*/ 7, /*reset=*/ 5); /* Elec Freaks Shield */
//Ucglib_SSD1351_18x128x128_SWSPI ucg(/*sclk=*/ 13, /*data=*/ 11, /*cd=*/ 9 , /*cs=*/ 10, /*reset=*/ 8);
//Ucglib_SSD1351_18x128x128_HWSPI ucg(/*cd=*/ 9 , /*cs=*/ 10, /*reset=*/ 8);
//Ucglib_SSD1351_18x128x128_FT_SWSPI ucg(/*sclk=*/ 13, /*data=*/ 11, /*cd=*/ 9 , /*cs=*/ 10, /*reset=*/ 8);
//Ucglib_SSD1351_18x128x128_FT_HWSPI ucg(/*cd=*/ 9 , /*cs=*/ 10, /*reset=*/ 8);
//Ucglib_PCF8833_16x132x132_SWSPI ucg(/*sclk=*/ 13, /*data=*/ 11, /*cs=*/ 9, /*reset=*/ 8); /* linksprite board */
//Ucglib_PCF8833_16x132x132_HWSPI ucg(/*cs=*/ 9, /*reset=*/ 8); /* linksprite board */
