Want to build a portable "TV" video display unit? An old laptop screen serves as a great starting point for building a display panel, and an HDMI driver board makes it easy to connect the display to a computer. The next step is adding a battery pack, making it portable, using a pair of voltage regulators to set up the 12 volts and 5 volts required to power the components, and an external charger to recharge the batteries. A sound bar is easily buildable using a set of small speaker drivers and audio amplifiers. The "television" portion is a question mark, however since it's nearly 2020 we can easily connect this to the Internet for video streaming using a Chromecast or other HDMI gizmo. The parts can be easily enclosed in a case, and voila you have a complete and portable video display system.

Why spend a zillion dollars on a commercial weather station that doesn't do what you want? With some time and ingenuity you can design and build your own weather station.

Ring lights are used by camera buffs for macro-photography. It's an excellent way to light the subject of the photograph from the same angle of perspective as the camera lens. This is important for avoiding shadows. It's also desirable to have a softer light than a regular camera flash.

This DIY project inexpensively builds a circle of LED light units into a form that can be easily screwed onto the front of a camera lens.

An ultra-powerful PC with high end CPU and high end graphics is supposed to be loud because of the cooling fans, supposedly. In actuality an ingenious air cooling system coupled with low-noise fans can keep even a high-end system cool while making essentially no noise. Watching this makes me think of Apple, whose attempts at low-noise ultra-powerful machines look pale in comparison to the visual esthetics of this computer.