Electronics and technology blog    /    Materials for November 2016 year

A few months ago, I published a review of a small engraving machine. In that review, I pointed out the design flaws and mentioned that I planned to fix them. In this review, I’ll cover the parts for the machine, add a little theory, and show the upgrade process.

I get asked about various video surveillance systems in private messages quite often. The questions vary, but I’ve noticed that most of them boil down to explaining the basics. People also ask for help choosing an inexpensive, simple system for a summer house, a private home, or a small shop. For this review, I picked a basic kit and will use it to explain what’s what and what you need it for.

Not long ago, I reviewed a small computer, and commenters said it would have been better with passive rather than active cooling. I didn't mention at the time that I'd just bought a small computer with passive cooling and similar specs. So today I'm reviewing that computer. We'll test it, heat it up, and take it apart.

I got my hands on a rather interesting charger—or, more accurately, a power supply. But this name has become so firmly associated with this category of devices that it’s probably easier to call it a charger. As always, the device has its pros and cons, which I’ll show you. I’ll also take it apart and give you some information on how to choose power supplies and chargers properly.