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There are affordable switch mode DC converters available. One that you see often is this Benq 12 V to 5V converter. I can find info on all components, except the inductor. And I don't have an inductance meter. There are several other ways to measure inductance. In this exercise I'm using the method with triangle waveform as described on meettechniek.info.   Ingredients: the inductor, desoldered a function generator with triangle waveform option an oscilloscope   The setup is str ...
When I saw Michael's post on a power supply for the Archeology Resistivity Meter that's being designed here in the community, I remembered I have a switch mode transformator in my scrap parts box. It's there since forever. I unsoldered it when throwing away a consumer product. Not to be reused in a circuit, but as a source for enamelled wire. The transfo has 12 pins. It's been so many years ago that I couldn't remember where I got it from. Out of curiousity I'm trying to find out what the l ...
There is a not so surprising trend to replace lead-acid batteries used in all kind of systems or devices with lithium-ion batteries (LIBs). When checking lead-acid batteries in these devices or systems by service technicians then often a battery tester like HIOKI's BT3554 is used. That raises the question whether this or any other battery tester can also be used in the same way as with lead-acid batteries. From a sensitivity point of view the BT3554 offers a 3 mOhm range - so even measuring larg ...
QuantumScape says it has developed a new battery technology that could be utilized in EVs by 2025, and it has more advantages over lithium-ion. (Image Credit: QuantumScape)   QuantumScape, a 10-year old startup based in California, says it has resolved issues with lithium. Volkswagen is expected to use pure metallic lithium in car batteries by 2025. QuantumScape also announced that it would be going public using a SPAC to list on the New York Stock Exchange in the fourth quarter. The post- ...
The other day I posted something in this group about how temperature affects a battery measurement because I wanted to find out how much that impact actually is. There was great feedback regarding this post in the comments (thank you very much for that!) and I also got feedback from outside of this forum. One of these comments from outside told me that I "commited a capital sin by using the brass tabs on the battery terminals to connect the Kelvin probes of the BT4560 test cables". Yes - I ha ...
The orange-tinted solar panels could be utilized in the future, allowing farmers to generate electricity while producing vegetables. (Image Credit: University of Cambridge)   In the future, farmers could grow their crops indoors underneath tinted semi-transparent solar panels, allowing them to generate electricity while growing vegetables. This is what researchers at the University of Cambridge have already achieved, and they say it could result in larger profits for farmers and maximize ...
Painting a blade black can dramatically reduce the number of birds killed by wind turbines by up to 70%. (Image Credit: May et al. ./Ecology and Evolution/Wiley Online Library)   The number of birds killed by wind turbines per year could be drastically reduced by painting one of the blades black.  In a new study conducted at a wind farm in Norway, Smøla, researchers discovered that changing the color of a blade from white to black reduces birth deaths by up to 70 percent.   ...