https://easyeda.com/adamseamster/pi-zero-topper
Backlight Dimming
LCD driven by GPIO using custom RGB 565 overlay
Made for Pi Zero and Zero W, works perfectly with Pi 3
Installation Instructions
Download repository, extract it, choose the folder that corresponds to the LCD you're using, and copy all files and subfolders to the BOOT partition of a Raspbian/RetroPie image. You must overwrite the original config.txt, and you must merge the overlay folder.
Install the SD card and boot up. That's all.
Backlight will be set to 100% at bootup. Software will be added soon to allow backlight dimming.
The following LCDs are compatible with the Topper (more to come as I test them):
http://s.click.aliexpress.com/e/bqnimQB 4.3" good quality and powerful 2-strip backlight (40mA), 480x272 resolution
http://s.click.aliexpress.com/e/uzf2RJE, 5.0" LCD, great image, 480x272 resolution
http://s.click.aliexpress.com/e/rf6yNvR 5.0" LCD, great image, same LCD Adafruit sells, 800x480 resolution
https://ebay.to/2kxCGdu 7.0" LCD, great image, this LCD is huge, 800x480 resolution
http://s.click.aliexpress.com/e/brBQjFEg 7.0" LCD, looks great and is super cheap (this is the best-looking 7" I've tested), 800x480 resolution