Archive for December 2020

DC-DC “inverter”

Sometimes devices sold as power inverter that claim to convert 12V to 230V AC (or 110V AC in USA) are not inverters at all, but DC/DC converters that output DC. I would say that calling such device “inverter” is not right, even though it might work with some originally mains powered devices. I have one

Relay power inverter circuits

A relay power inverter converter simple and easy inverter make circuit to convert 12V to AC voltage that can drive some small 230V AC loads like some low power lamps (LED or fluorescent energy saving bulbs). It is often advertised as a simple and easy electronics diy projects make at home. The basic idea of

CPU Benchmarks and Hierarchy 2020

When it comes time to buying a CPU for your desktop, you’ll find a dizzying collection of model numbers and specs from both Intel and AMD. Tom’s Hardware has listed the best CPUs for gaming and best processors for work. If you want to know how each chip stacks up against all the others, this

Sine wave inverter technology

An ideal power inverter will produce same kind of power that is available from mains outlet, which typically means sine waveform 60 Hz 11-120V AC or 50 Hz 220-240V AC. That kind of power source can power all mains powered devices as long as enough power is available. Where power inverter devices substitute for standard

Modified sine wave inverters

This is a continuation to my Power inverter designs post. The first post was about general details of inverters and square wave inverters. Because square wave inverters are not suitable for many applications. The next better inverter category is so called modified sine wave inverter. Modified sine wave inverters are less complicated than sine wave

CentOS has been effectively killed

On Tuesday, Red Hat CTO Chris Wright and CentOS Community Manager Rich Bowen each announced a massive change in the future and function of CentOS Linux. Moving forward, there will be no CentOS Linux—instead, there will (only) be CentOS Stream. CentOS Linux is dead—and Red Hat says Stream is “not a replacement”. CentOS Stream, founded

Electronics shops in Helsinki and near Helsinki in Finland

Electronics component shop are dying. My nearest electronics component shop Yleiselektroniikka in Espoo Finland at Luomannotko 6 just closed it’s shop few weeks ago. They still sells online. The remaining shops are much smaller and much farther away on other nearby cities (Helsinki and Espoo). The way seems to be now to return to mail