Electrical power

AC vs DC power in data center

There has been a debate going on for some years if the traditional AC or new DC power distribution is best approach to power a data center. The DC power side has been pushing their technology with claims of quite considerable power savings. In many published articles, expected improvements of 10% to 30% in efficiency

Incandescent lamps ban in EU

Ban on incandescent lamps is progressing. Say goodbye to incandescent lamps – soon they are no longer visible in stores. Incandescent light bulb ban has progressed gradually. As early as September last year, the 60-watt incandescent bulbs were banned. The manufacturing of 40W and the weaker light bulbs in the manufacture and importation of the

Power factor correction devices

Power factor correction devices: Can they really reduce your electricity bill? article tells that so-called “Power Saver Devices” (known by different names) are nothing but Power Factor Correction (PFC) devices that would connect to the mains and improve power factor measured by your electricity meter. The so-called “Power Saving” device may be useful for industrial

High power PoE and HDBaseT

Power over Ethernet (PoE) offers convenience, flexibility, and enhanced management capabilities by enabling power to be delivered over the same CAT5 cabling as data. This technology is especially useful for powering IP telephones, wireless LAN access points, cameras with pan tilt and zoom (PTZ), remote Ethernet switches, embedded computers, thin clients and LCDs. The original

What's inside a smart meter?

You can usually find the folks at iFixit tearing down electronics with an eye toward expanding your knowledge of how to repair your electronic devices and keep them out of landfills by extending electronics’ life span. What’s inside a smart meter? iFixit tears it down article tells that the technicians at iFixit got their hands

Fused multimeter probes

This is my second product test on Free Product Road Testing program by Farnell. This time the tested product is fused test leads for multimeter (Farnell Number: 428-4276). Why Fused Leads? You might ask why test leads need be fused. Trust me there are situations where this is a really good idea. Maintenance of electrical

AC current levels

AC current levels 0.25mA  Maximum Leakage Current for Class II equipment in IEC 950 (Information Technology Equipment, I.T.E.) (no protective earth ground in the equipment, double insulation or reinforced insulation) 0.5mA Earth Leakage Current limit in IEC 601-1 (Medical Equipment) (this is general value, here are also other leakage current requirements in IEC 601-1) 0.5mA

Common DC voltage levels

DC voltage levels: 0.7V Nominal voltage drop on normal silicon diode or similar semiconductor junction 0.8V Voltages from 0V to 0.8V are considered to be logic 0 on TTL logic IC inputs 1.25V NiCd, NiMH battery cell nominal voltage 1.5V Carbon and alkaeline battery cell nominal voltage 1.6V The voltage you normally get from a

Commonly used AC voltage levels

AC voltage levels: 0.316V The most common nominal level for consumer audio equipment is -10 dBV, 0.316 volts root mean square (VRMS). 0.7746V The reference voltage for the decibel unloaded (0 dBu) is the voltage required to produce 1 mW of power across a 600 ohms load (approximately 0.7746 VRMS) 1V  The reference voltage for