Top new questions this week:
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As I understand it, impedance has an imaginary and a real part. To be able to perform any useful calculations, one needs to know both. Cables and speakers usually only say like “8 Ω” or &…
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Are there important points to consider in typical or special applications when capacitors operate with applied voltage close to their rated DC voltage? Such as: 15 V on a 16 V-rated capacitor, 24 V …
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In the USB-UART ICs field the best known warrior-with-counterfeit is FTDI with the FTDIgate-2014 and FTDIgate2.0-2016. Do other vendors (like SiLabs, Prolific, Microchip, Cypress, MaxLinear or Nanjing …
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The problem: AC 230 VAC fans in a system rated to 100 °C need to be monitored for failure. There is no third wire, just the L and N leads. None of the potential solutions seem good. For example: …
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Bought several tubes of 74LS00. We test the datasheet spec for VIH by sweeping one input from 0 V to 5 V while holding the other input at 5 V, and checking the output. Usually we expect to see a …
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Looking at analog multimeters on Amazon I came across several that have one switch position that appears combined for the lowest V and µA settings. I’ve used various analog multimeters over many years …
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I designed and got a PCB manufactured for the first time, and have soldered the component and powered it up. However it is not behaving as expected. I think I may learn something by everyone here for …
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Greatest hits from previous weeks:
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I have built my own board with STM32F7-45VGT6. I have successfully programmed it with ST-LINK v2 (not the original one though) and now I cannot even connect with MCU. I use ST-Link Utility from ST …
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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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I have a cell phone battery that has the following written on one side: 3.7 V 1000mAh Limited charge voltage: 4.2 volts I understand that the first line means, that the battery will always give 3….
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As a novice electronics hobbyist, I have heard these terms and more being thrown around everywhere. At its root, I understand that they are all based on communication between devices, computers, …
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I’ve met many projects in which an AVR microcontroller uses with a bootloader (such as the Arduino), but I don’t understand the concept very well. How can I make a bootloader (for any microcontroller)…
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I am confused on the terms Open, Short, and Closed when talking about circuits. As far as I know: a) Open circuit means the wires are cut off so there will be no current flow, but there is voltage. b)…
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I was just watching a mega factory video and wondered why they use an AC motor which requires a power inverter instead of DC which may be powered directly from their DC battery? Introducing an …
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Can you answer these questions?
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I have designed this inline motor soft starter circuit: The input is switched externally. When it’s turned on, the MCU powers up and produces a ramping PWM output which gradually energizes the motor. …
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In my design, I’m using VL805 USB 3.0 Host Controller which takes 1 lane of PCIe and outputs 4 ports of USB3.2 Gen 1. The platform which I’m building is based on AMD V3000 CPU. My question is, if …
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I have a development board project where I want to use USB as the power source when plugged in and then switch off the battery – and vice versa. Then I am running it through a 3.3V fixed LDO (AMS1117-…
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