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There are 35615 individual articles here that are part of 5223 discussions
Please see below the list of the most recent and the best rated articles in General Electronics

The most recent discussions

phone antennas


August 17, 2021, 11:43 pm

Do cell phones contain a separate antenna each for phone network, Wi-fi and Bluetooth? Also, does Bluetooth include any security? Like, if a user is listening to his music through a Bluetooth li... Read more »

battery charger


July 18, 2021, 12:19 am

I picked up a AAA NiMh battery charger. The label reads: Output: 1.2 V 800 mA AA/AAA charging: 120 mA Why the two different current specs? Does not compute - -- Rich Read more »

solution manuals


June 30, 2021, 7:43 am

Solution Manual Modern Robotics : Mechanics, Planning, and Control (Kevin M. Lynch, Frank C. Park) Read more »

automobile remotes


February 16, 2021, 10:24 pm

A question concerning the car remotes; door lock, headlights, etc. Each car/handset must be a matched pair, regarding the ID and security codes. Obviously only one car in the parking lot ought ... Read more »

ICETech Micromaster LV


February 2, 2021, 6:31 pm

I have one of these things sitting around in my workshop but so far I have been unable to make any sense of it, so rather than chuck it in the skip I am offering it free to anybody who might want... Read more »

Ancient refrigerators


January 8, 2021, 4:43 am

How did they make ice, in the days before electricity? And did they figure it out empirically, prior to the development of thermodynamic theory? ? Rich Read more »

Power Routing Switch


December 7, 2020, 4:27 am

Working on a gadget that uses a 12 volt motor (10 amp peak) and misc electr onics running on lower voltages. It is powered from an external PSU like a laptop supply, but 12 volts. There is also a ... Read more »

warm air


November 18, 2020, 9:37 pm

A nearby college includes a building, surrounded by an outdoor arcade, at street level. At one point, the warm internal air is expelled, which is natural, they perform continuous circulation. A... Read more »

C.Crane radio antenna problem


November 14, 2020, 5:10 am

Hi, I have a C.Crane Witness + Radio. It has a tivo-like function and can record broadcasts to mp3 files on an SD card. The antenna fits into the headphone jack and is about 2 ft long. The recep... Read more »

Lime skates


September 14, 2020, 8:46 pm

I looked at one of those Lime electric skateboards. It has a QR code sticker, and no other user interface, that I noticed. I never rented one, and wonder how the system works, the network stu... Read more »

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The best rated discussions

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5

LEDs Series-Parallel OK?

  [ 2 ]

Connecting LEDs in series-parallel like the ASCII schem below is okay? I don't see any reason why it shouldn't work. If a lot of LEDs, like the 7 below, are paralleled, the total current for each... Read more »

rating
5

car phone


In old movies, you sometimes see something called a 'car phone'. Always in a limousine. How did those work? -- Rich Read more »

rating
5

IBM Selectric typewriter


I have two cycle wheels for the IBM Selectric typewriter. Read more »

rating
5

LED flashlight


I was looking at some LED flashlights, with ratings from 50 to 150 lumens. A p-n junction is a p-n junction, how do they get such varied outputs? I examined the working end, they all look alike, w... Read more »