Review on 🖥️ Waveshare 7 Inch Capacitive Touch Screen LCD (C) 1024 X 600 HDMI Interface Display Shield Panel - Raspberry Pi/PC Compatible - Raspberry Pi4 3 Model B Supported by Mark Tompkins

I bought this as a display (version 2.1) for my Raspberry Pi 2 running OctoPrint with the awesome TouchUI plugin. This display works great and has a higher resolution than the official Raspberry Pi display (1024 x 600 vs 800 x 480). Colors are fairly accurate, although those used to oversaturated LCDs might find it a bit dull. The capacitive touch works well, however there are some bugs very close to the corners which can cause some erroneous clicks, but this area is small enough to be avoided. Everything works out of the box once you set the display information in config.txt, even display rotation and rotation of touch events for portrait orientation. And that although only two cables for power supply, video feed and touchscreen are connected to the display. Getting back to the practical Pi, it draws a lot of current on the 5V line, around 600-700mA when the display is on, on top of the 400mA the Pi 3 draws. I'd rather have an external power input, so all the power goes through the Pi's traces. Even better if I could power it with 12V like so many other HDMI driver boards do. I have studied the display board PCB layout and it is good as it uses well known branded components from companies like Atmel and TI. The LCD and LED backlight drivers are rated for an absolute maximum of 6V, so there is no way to change them to use 12V instead of 5V. The LCD backlight has a convenient switch on the back of the driver board that allows the user to turn the backlight on and off to save power. I found this an odd solution instead of having the display turn off based on the HDMI input and the DPMS standard. This means the Pi will try to put the display to sleep if it's idle long enough, but it just goes black - the backlight stays on, so the power saving is minimal. I ended up modifying the board to connect the driver chip's SCDT to the !PDO and the LED driver enable line to be able to turn the display on and off from the Pi. I don't understand why Waveshare didn't design the board this way and that's the main reason I took a star off this review.