module ZephRay;

I bought these screens some while ago. The small one have integrated controller while the bigger one doesn’t. Both were sold for $1.5 each.

The integrated controller on the small one is UC1698U, which is a CSTN controller instead of a STN controller. This do cause some trouble, since every pixel in the controller map to three pixels on the screen.

Sorry for the image quality, I should have waited till morning to take the photo.

Read more if you want to see the reverse engineered pinouts and driver source code (possibly useless).

This screen was given to me from Grassmover. But I havn't played with it since then. I tried to drive it last night, and found out that the VEE is wrong (3.xV), it should be a negative voltage. Then I found the inductor was broken, so I replaced one. Now it is working correctly except for one missing line.

2.4″ SPI TFT with a resistive touchscreen. SPI running at 62.5Mbps.

Unfortunately, The Raspberry Pi is just too thick, otherwise it would be fun to build a calculator around it.

A little bit probe and some experiments, and, it is here.