Electronics and technology blog    /    Materials for July 2014 year

Quite a few years ago, I first learned about making circuit boards using the laser-and-iron method. To me, it was like the invention of the wheel. Read the rest of the story after the jump.

There's an old air conditioner at work. It works, but it doesn't have a remote, and using it without one isn't very convenient. I tried a few remotes from the market, but none of them worked so far. So when I was picking another product to review and test on the Chinabuye website, I decided to give their universal remote a try. Read on after the jump.

Not long ago, a friend brought me his beloved laptop. The cause of the failure was almost banal: it had been spilled on with juice. Coffee would have been even more banal. Read on for the rest of the story.

I have an ESR meter built using a circuit designed by GO, a fellow member of the pro-radio forum. I’m sure some of you use this meter too. I use it all the time, but when it runs on a 9V battery with the display backlight on, it drains batteries pretty quickly, so I decided to order a pair of rechargeable batteries for it. Details after the jump.

About 17–18 years ago, I saw a similar detector in the kitchen of one of my clients. While the apartment owner was away, we even tried it out with the builders. But back then they cost a lot of money, so I didn't buy one, and then I somehow forgot about it. A few days ago, a similar (if not identical) detector was sent to me free of charge for review by the chinabuye store. Read on for the description, photos, and details on how to use it.

Some readers may remember my review of a homemade bench power supply. Recently, interface converters arrived to go with it, for connecting it to a computer.