Some 4K TVs have QLED or OLED displays, but most are LCD, and many of those have LED backlights. When you're shopping for a new TV, these are the sets you'll come across most often. We're going to ...

To extend the usefulness of his TP-Link router [Roman] built a rig that adds an LCD screen to display the terminal. But it ended up being quite a bit more powerful than that.