I saw a quite interesting looking waveform from a 10W LED floodlight powered from 230V AC. It looks like when AC voltage waveform instantaneous voltage lower than some voltage, it takes practucally no current and above it it looks like a constant current load. This is picture of the light. This looks like this uses →
What is the problem of using a coiled extension cord? When the power cable passes a considerable load current, it will definitely heat up noticeably. As the load current increases, the temperature of the cable surface will be higher. A cable loaded near it’s rated current can feel that it is warm to the touch, →
“Schuko” is a short form of the German term Schutzkontakt (literally: protective contact),[1] which indicates that plug and socket are equipped with protective-earth contacts (in the form of clips). https://en.m.wikipedia.org/wiki/Schuko It is very commonly used throughout Europe for 230V 50 Hz AC power up to 16A. Origin of Schuko® https://www.plugsocketmuseum.nl/Schuko-origin.html →
Have you noticed that the size of the USB C plug is such that it is possible to insert it to an US outlet. The USB C connector just fits to the wider prong hole in the US connector (slightly too big for thinner prong hole). It is even possible to make the USB connector →
The CEE form, also known as CEEFORM, is an abbreviation of Certification of Electrotechnical Equipment. Ceeform is a certificate for electrical equipment. It was formerly published by a European body called Commission internationale de réglementation en vue de l’approbation de l’équipement électrique, which is now superseded by IECEE. The “cee” in ceeform socket and ceeform →
A microwave oven is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range (typically around 2.4 GHz). What is the circuit diagram of the device →
About 1 percent of all electricity generated goes to cloud computing. By the end of this decade, we could be devoting 8 percent or more. How much energy can we dedicate to all this computing? Software and hardware engineering will no doubt need to reorient their design practices more around power efficiency. Read more: Cloud →
Ethernet Killer is well known meme in many versions. Fiftythree.org presents: The Etherkiller and Friends says” “It all started one day with this guy, the origional Etherkiller, developed with a few misc parts to warn new users that the IT department is not to be messed with. You too can make one at home, connect →
Any form of energy, when not properly controlled or harnessed, can result in serious danger to those who use it. Electricity at any voltage can be dangerous and should always be approached with caution. Direct Dangers of Electricity include a variety of hazards that include Electric Shock, Physical Burns, Neurological Damage and Ventricular fibrillation resulting →
Sometimes there are needs to measure mains voltages with oscilloscope. You must be very careful when measuring voltages on the mains with any measurement instrument. The mains voltages are absolutely deadly. Measuring mains voltages with multimeter can be dangerous. Trying to do the measurement of mains voltage with oscilloscope is potentially more dangerous, because typically →