Author Archive

Friday Fun: Strange cables

There is a web page full of strange, potentially dangerous and funny electrical cable ideas at Do not try those yourself! The page shows even one of my cable idea…

HOPI Meter power consumption analyzer

If you’re anything like me, chances are that you have a lot of gadgets in your home or office. But how much power are these gadgets using — and wasting? A common question is how to measure power consumption for devices. Some people are coming at this from a perspective of pure curiosity, others are

Biltema 6-in-1 multimeter review

Introduction My trusty MS8209 multimeter failed. It was the second same type multimeter that failed for me. Annoying, but not that bad that both of those multimeters had both lasted around 10 years or more for me. I needed to get a new multimeter. I wanted a multimeter with the same environmental measurement ranges as

Friday Fun: Finnish superhero

Artificial Intelligence has made its mark in the world of superheroes and it’s time for you to meet the Finnish heroes the world needs. It was only a matter of time before we used AI to imagine and create the most uniquely Finnish superheroes we’ve ever seen.

Digital timer clock teardown

Here is a tear-down of a mains powered (230V 50 Hz) timer switch. Let’s look how this is built. Many mains power timers use mechanism that has mains powered syncronous motor, but this is different. This one has a electronic clock timer in it. There seems to be one clock IC with a crystal (around

CCW 2023 seminar

I visited yesterday Critical Communications World 2023 seminar. My report article is published in Finnish at

50 years of Ethernet

50 years ago, Robert Metcalfe (who was working at Xerox PARC in 1973), wrote the first memo (titled “Alto Ethernet”) outlining what would become the ubiquitous Ethernet protocol! The idea was first documented in a memo that Metcalfe wrote on May 22, 1973. In 1979 he started a little company called 3com. Ethernet was commercially

Digital Money box

Tired of the usual piggy bank? Tired of having to count every coin cent by cent? Here is a quick test of electronics gadget that solves the counting problem. Digital Moneybox Savny InnovaGood is a Gadget Tech Digital Electronic Money Box! It is advertised as a perfect gift for kids and adults to start learning

MS8209 failed

I accidentially killed my favorite multimeter that had served me well for a long time. I was verifying another multimeter by comparing it’s reading to measurement made by this meter (that was checked to be accurate with a calibrator in 2020). My meter just went dead. New battery did not help. Any repair tips or