Review on Raspberry Capacitive Interface Raspbian XYGStudy by Luis Despain

Easy to install, works well, reasonable price. Replaced an HDMI connected 4" display to expose the GPIO pins that the HDMI display draws power from on my rPi-4. Set screen orientation and upload. Since the screen is small (compared to my fingers), touch is more for display than function and is still pretty geeky. (I'm a proud geek!) I managed to fit the screen, SSD card and rPi4 into the case that came with the HDMI display using standoffs, but I'll probably make the open case myself from Lexan- make plates.