Questions tagged [Electronics] (1503)

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Where direct current?

In one article on Habre explains how to get 7V from the power supply. Sorry for the stupid question, but I can not understand how it is a steady current when connected to +12V and +5V. And where a minus? Can just give a link to me to read.
emmalee_Stoltenberg asked April 19th 20 at 12:38
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Does somehow the microwave on the right side of the laptop?

My laptop is 30-50 cm from the microwave ( It is rarely used but always plugged in ). Now the laptop is whistling hard ( I'm pretty sure it's not related to the microwave ). But fears on this score there is, maybe bought a new laptop and if there is the slightest chance that it is because of this spoiled, I would prefer to ...
jacinto_Kuphal84 asked April 19th 20 at 12:34
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Multimeter measures the capacity at a constant current?

Millimetre (RLC-meters) without the frequency selection measure the capacity of DC? And RLC-meters to select the frequency of the measured capacitance on alternating current? And the multimeter can't measure capacitance with direct current? As can be understood following the proposal of measuring capacitance With the piezo...
gerry5 asked April 19th 20 at 12:21
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Fact or myth: the computer should not wear frequent inclusions-shutdowns? System hibernation on the SSD?

Hi habrovany! There is an opinion (read the Internet), the computer is often off during the day. Like, if you need somewhere to move away from the computer for 15-30-60 minutes (conditionally), then it is better not to turn off, because "is it hurting, wears out". But desktop can eat electricity in a simple and somehow no ...
Emmanuel asked April 19th 20 at 11:56
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How to charge the battery?

Good day There are 2 batteries as pictured Is it possible to connect them together and charge from the car charging (~10% of current) ? And whether they are suitable for the organization of lighting ? For example, small led light bulb 10W 12V ? Thanks in advance
nicholaus80 asked April 18th 20 at 13:33
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How to select/calculate the diodes for a class AB amplifier?

There was a need to calculate the diodes for a class AB amplifier. Thanks in advance
shania_Leffler72 asked April 18th 20 at 13:26
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Why the laptop is not completely off?

Changed hdd to ssd with Windows 10. If the laptop works longer hours, after shutdown, the screen goes off, but cooler running and have to hold down the power button. If less, then the job is completed correctly. What could be wrong? With the old hdd and Windows 8.1, all was well.
Laurel asked April 18th 20 at 13:25
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What is the zigbee device to choose for a thesis?

Colleges want to put practical experimentation with testing of the zigbee channel. To clarify: I want to connect multiple devices to the network and try to break the link with a link to check the automatic connection to others. I also want to test the noise immunity and transmission distance. Unfortunately I have no idea ...
Eric_Wunsch97 asked April 18th 20 at 12:17
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How to implement interaction between two esp8266 wifi modules at a great distance?

Hello! I have a question. How can I connect two modules esp8266. Here is a simple example of this system. We have two Wi-Fi module, for example one is in one city and the second module in the other. I have a task to control the servo using a variable resistor. Accordingly, the resistor(physical) and the servo are in differe...
soledad_Hilll asked April 16th 20 at 11:11
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How to close the contact of a button control using optocouplers?

Hello, I need to close a tactile button on the home appliance with electrically insulated device. There is a optocoupler with a NPN transistor (817ะก). Want to know how to act. Right I understand that I will need. 0) Solder wires to the button. 1) to Measure the potential at the contact of a button. 2) properly connect the ...
Sharon.Gra asked April 16th 20 at 10:43