Top new questions this week:
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Firstly, let me preface this with the fact that I am not interested in chastising the user, and I am not interested in looking at the original source of the arc (it was a tool accidentally breaching …
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Electrolytic capacitors service time is based on maximum operating temperature, among other things. When they are inside an SMD soldering oven, the temperature increases to over 375°C. Most of the …
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A local ISP is installing fiber optic cable for gigabit internet in my neighborhood. Their construction crews have buried runs of empty conduit which I presume is meant to be filled with fiber or …
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Home hobbyist here. I’m trying to be a little more automated in my reading of resistors. I’ve gotten pretty good at reading the 4 bands with the beige background, I find the colors easy to read, and …
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I want to have good power system for my van. I liked Jackery Explorer 240 . Price is good: $219.99. But the problem is that its capacity is only 16.8Ah and only 2 USB ports. I can buy a more expensive …
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I can solder and use basic features of multimeter so excuse my ignorance. This is driving me crazy, this a potentiometer from speakers which lost left channel sound. I disconnected the volume control (…
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Using a calculator like this one I see that the trace width required for 10 A is 9.36 mm at 2 oz (highest JLCPCB offers). My IRLZ44N transistor has 2.54 mm spaced legs, so how does putting two 10 mm …
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Greatest hits from previous weeks:
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This may seem like a very simple question, but I’ve searched all over the place and haven’t found an answer. When jumping a car, we connect the + end of the charged battery to the + end of the dead …
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A diode is put in parallel with a relay coil (with opposite polarity) to prevent damage to other components when the relay is turned off. Here’s an example schematic I found online: I’m planning on …
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What is a decoupling capacitor (or smoothing capacitor as referred to in the link below)? How do I know if I need one and if so, what size and where it needs to go? This question mentions many …
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Lots of new batteries (for mobile devices, MP3 players, etc) have connectors with 3 pins. I would like to know what is the purpose of this and how should I use these three pins? They are usually …
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In this heavily upvoted answer the answerer states that it is okay to supply a component with more current than what it’s rated for. The analogy is that (paraphrasing here) “If Johnny wants to eat two …
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What’s the difference between a microcontroller and a microprocessor?
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The official page of Wikipedia mentions that reverse saturation current is a part of minority current caused by the drift of charges. I am really confused about this. In class, we have been taught the …
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Can you answer these questions?
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I want to build code for my STM32F030F4 using arm-gcc-none-eabi. The STM32CubeF0 is already downloaded, and inside the repository, I found the location of the startup file. However, I haven’t found …
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I have a 5-motor magnetic stirrer, used for non-contact stirring of labware. My problem is that this stirrer was designed for bacterial cell culture, and not mammalian (more fragile, needs slower …
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I need to wire up the four GPIO pins (connected to the FPGA pins) in a way that keeps the value of the pin at a pulled up value of appropriate voltage. I have an option to use the pullup resistors. …
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