PlayStation Portable (PSP) 4.3” screen is cheap true color TFT display. Florian wanted to make use of it and decided to interface display to his DE0-Nano board. He faced couple problems here. First was a difference of voltage levels on FPGA and display side. Since FPGA pins are tied to 3.3V and display require 2.5V he decided that difference is safe enough to drive LCD with 3.3V. Another problem were back-light voltage. It required 20V to light 7 LEDs in series.

To solve back-light problem he assembled a boost regulator using LT1932 to rise voltage from 3.3V. He made a nice looking board with some traces less than 10 mils thick. Great job considering that Florian is just starting with FPGAs.