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2025 3 02 2026 elektor and eenews europe ended 2025 on a high note recording significant audience growth across webinar precision picoammeter picoamp measurements and i v curves with johannes sturz 2 02 2026 precision picoammeter webinar join host brian tristam williams in welcoming presenter johannes sturz power energy 2026 bonus edition download your free digital copy 15 01 2026 looking for new power and energy related projects and insights download the free power elektor tv delivers 5 9m views in 2025 as engineering programming scales worldwide 9 01 2026 elektor tv delivered a breakout year in 2025 generating 5 9 million views while rapidly elektor january february 2026 power and energy 8 01 2026 we kick off 2026 with the annual power and energy edition of elektor inside you ll find a range of elektor lab talk 42 power energy edition low noise psu with ton giesberts esp32 by example 5 01 2026 the january february power energy edition will be fresh out and elektor lab talk 42 will be a circuit diy battery tester 17 12 2025 a blast from the elektor archives this clever 1998 battery tester uses a simple led display to available now elektor mag guest edited by edge impulse 3 12 2025 elektor welcomes edge impulse as its 2025 guest editor for an in depth edition dedicated to the ai at the edge the future of physical ai with edge impulse webinar 1 12 2025 join us live on december 11 for an exclusive elektor webinar with daniel situnayake from edge 5 free for members esp32 based energy meter train an edge impulse model to recognize household loads 1 12 2025 ready to add ai to your esp32 energy meter in this project you ll learn how to use home assistant data circuit ac power adapter tester 28 11 2025 before trusting that bargain bin power adapter make sure it s not packing surprises this diy ac power adapter stm32 edge ai contest 2025 the winners 27 11 2025 the judging panel of the stm32 edge ai contest selected three exceptional projects that demonstrated wireless device powering with inductive technology 24 11 2025 power a lamp or heat a mug no wires needed this project transfers 20 w through a 5 solar and wind energy top wind power wise move or waste of time the uk government recently announced the world s biggest ever expansion in wind energy so how realistic is this scheme what are the pitfalls technical and otherwise and how viable is it economically it s time to look at wind generation in the round wind is simply air in motion with mass and energy it has been used for centuries the most obvious example being windmills in 1850 the american daniel halliday developed the multi bladed farm windmill a relatively simple device that inspired the first attempts to convert wind into a form of energy that could be either stored for future use or applied elsewhere download article balcony power plant diy solar balcony speedy payback you don t need to cover a whole roof with pv solar panels before the installation becomes both economically and ecologically viable the idea of a grid tie pv installation on your balcony is starting to gain traction with so many office workers now working from home any energy input from sunlight can help offset the additional domestic power usage during daylight hours these mini power plants are quite cheap and even benefit from subsidies in some european cities i looked into the regulations governing them did some research on the equipment and went ahead with the installation download free article solar power made simple solar charging with and without a controller complicated charge controllers and inverter circuits can be used to squeeze the last drop of energy out of a solar panel contrary to popular belief however it is also possible simply to connect the battery directly to the panel download article optimizing balcony power plants considerations interesting facts and calculations the hype surrounding solar technology in general and balcony power plants in particular has continued unabated since the start of the war in ukraine and the resulting uncertainty regarding energy supply in central europe since our last article in 2021 supply and sales in this sector have seen huge growth and prices are lower than ever the background information in this article will make it easier to get started download article batteries top the road to battery power the dawn of the age of electric vehicles at the beginning of the twentieth century the internal combustion engine started to take over from electrically powered vehicles now a hundred years later electric vehicles are slowly but surely making a come back development continues apace and the enormous potential is clear the key to the success of electric vehicles lies contrary to early expectations in lithium ion cells rather than in fuel cells download article abc of rechargeable batteries basics pitfalls recommendations the remarkable progress in battery development owes much to the the boom demand for portable gadgets like mobile phones laptops camcorders and mp3 players to shed light on the batteries powering these devices let s take a nostalgic stroll through the charging methods and battery technologies of yesteryears including the trusty nickel cadmium nicd nickel metal hydride nimh and lithium ion li chemistries download article safety in large lithium battery installations every manufacturer of mobile phones tablets and notebook computers looks to lithium ion technology to provide a lightweight long lasting and reliable energy storage capability that can fit easily inside a small enclosure or housing crucially after billions of hours of use worldwide lithium ion batteries in these applications have proved to be safe how come download article solar cell battery charger monitor solar battery chargers store the energy obtained from the sun in batteries the author has developed a system that charges the battery according to the manufacturer s specifications and protects against deep discharge the system displays all important operating parameters on an lc display according to the manufacturer s specifications the peak power of the solar module used here is 150 w at 14 5 v in practice the current after deducting all losses is a maximum of 7 5 a download article lithium battery pack repair save money more power it s a familiar story after a few years of use the cordless screwdriver needs charging more often and the cordless vacuum cleaner doesn t have the energy to collect your crumbs the simplest and most costly solution is to order a replacement battery pack but have you considered just replacing the cells in the battery pack this approach saves money and reduces waste this isn t just a repair it s an upgrade download article power supplies and inverters top cool power switch mode power supplies an introduction switch mode power supplies smps are often too quickly put aside because of their complexity this article presents an overview to smps technology and a brief description of the most widely used topologies but in a practical way trying to demystify the topic and encourage the electronics hobbyist to start developing his own switchers or at least know how to choose the right topology for a given application download article professional lab power supply quality has its price ordinary power supplies are as common as sand on the beach and even lab power supplies come in all sorts and sizes these are adequate for many purposes but if you want high quality high stability and precise regulation you have to put out a lot of money and that for a power supply with only modest output power another option is to build one yourself download free article sinewave inverter with power factor correction power inverters are used to generate ac powerline voltages like 230 vac or 115 vac in the field using high capacity 12 v or 24 v vehicle batteries they come in a wide variety of output powers anything between 15 and 1 000 watts and quality of the ac output voltage anything from abominable to pure sinewave some models even have output voltage regulation few however combine power factor correction pfc with pure sine wave out hence a suggested design appears in this article along with a light theoretical background download article 40 v linear voltage regulator an alternative power supply for those who frown upon any shape or form of switched mode power supply smps for the high end fortissimo 100 power amplifier this project yields a 500 va linear symmetrical voltage regulator marked by low dropout voltage high output current and excellent stability all obtained from discrete components and built from a kit read article online versatile power supply for breadboards breadboard power supplies are useful when no desktop lab power supply is available most of the modules on the market are limited to positive output voltages lower than the input voltage the project we present here is different with the help of two integrated circuits from maxim a 5 v micro usb adapter at the input provides up to four adjustable output voltages three positive ranging from 0 6 v to 20 v and one negative from 1 8 v to 11 v read article online measurement top comparing power density and power efficiency often the choice of power supply is made based on a single efficiency figure on the datasheet and manufacturers are doing all they can to drive this number up including defining the measurement conditions ever more carefully designers are coming up with more sophisticated topologies such as phase shifted full bridges psfbs and llc converters and at the component level mosfets supplant diodes to reduce losses even silicon is being challenged as wide bandgap wbg materials such as silicon carbide sic and gallium nitride gan promise enhanced performance even at high switching speeds download article high power adjustable load with power limiter an adjustable load resistance is indispensable for the realistic testing of power output stages this circuit provides an electronic alternative to the use of inconvenient high wattage resistors the circuit described here has two modes of operation it can function as an adjustable current sink or as a variable load resistance at a voltage of between 0 v and a maximum of 100 v the sink current can be set in the range 0 a to 20 a as a load resistance it can be set to values from less than 1ω to more than 100 kω the maximum power dissipation is in the region of 100 w the circuit is designed for operation with dc voltages but with the addition of a rectifier it can also be used with low frequency ac voltages a carefully constructed and calibrated unit can deliver a linearity of better than 0 5 download free article atx power supply tester a dedicated tester simplifies the evaluation of second hand pc power supplies often purchased inexpensively at venues like computer fairs this efficient tool requiring only a mains cable helps test all power supply outputs under load displaying deviations on six leds while a pc s power supply typically doesn t significantly impact its speed there are occasions such as a malfunction or increased power demands due to upgrades that necessitate replacement download article multi channel power analyzer up to 3 channels with graphic and alphanumeric display when making voltage current and power measurements on ac powered devices things are getting more complicated than measuring dc because waveform and phase shift between voltage and current play an important role here this instrument not only measures and calculates quantities but also shows waveforms and spectra of ac signals on a graphical lcd download article build an energy logger to measure and record power consumption there are many potential applications where a continuous record of the generation or consumption of electrical energy makes sense just think of the energy consumption of certain circuits in the house or the energy supplied by a balcony power plant or a larger photovoltaic system there are ready made solutions for recording but you can also build a suitable logger yourself read article online measuring power inductors most lcr meters measure components with a current of just a few milliamps for capacitors and resistors this is fine but the inductance and properties in general of power inductors vary with the dc current level to test this influence of the current on inductance all that is needed is a series current sense resistor with very low resistance and a stable power supply with high output current this principle has been applied in many different ways over the years a power switch often a mosfet and pulse generator is needed to switch off the voltage across the inductor before it gets too high an oscilloscope is used to monitor the current through the inductor this circuit is stand alone the maximum current is adjustable and a trigger signal for the oscilloscope is also provided no external pulse generator is needed a pcb ensures that resistance between power supply inductor mosfet and current sense resistor is minimal read article online components and circuits top power led driver if you want to operate power leds with a truly constant current which significantly prolongs the lifetime of the lamp and avoid the power loss resulting from using a constant voltage supply with a series resistor you need a suitable constant current source however the only way to achieve really good efficiency is to use a switching regulator download article wireless power transfer wireless energy transfer is the future with this small experimenting set you can explore this technology yourself very little is required and over a distance of about 5 to 10 inches you can transfer a small amount of energy download article power mosfet tester mosfet output transistors should be as near identical as possible irrespective of whether they are complerilentary pairs or connected in parallel the tester described here enables you to check that they are download article wireless power converter convey 50 watts through the air in cooperation with würth elektronik in this article we present a pair of modules for high efficiency wireless power transfer with a maximum capacity of 50 watts over distances up to a few centimeters this set is available at a special price to enable elektor community members to try out this highly promising technology download free article high voltage power insulated ssr embed your own solid state relay in your projects solid state relays also known as ssrs are widely available on the market for any voltage or current rating why make one then because it is sometimes useful in terms of cost effectiveness and pcb space constraints to incorporate one right into our circuit in this article we ll see how to design it with discrete components read article online related products the elektor power supply collection usb stick this usb stick contains over 200 different power supply circuits from the volumes 2001 2022 of elektor buy now elektor 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