Computers and Electronics
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Do you ever wonder how do computers actually work? In this video, I'll give you an oversimplified explanation of how computers are able to both store and compute information using transistors.
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Hereโs a bit more in-depth explanation of some of the ideas simplified in the video:
- In addition to storing and computing information, computers are generally also considered to need to handle inputs and outputs (otherwise there would be nowhere to get that information from or to send the result of computations).
- Transistors act as on/off switches, controlling the flow of electrical signals that represent information.
- Each bit of Random Access Memory (RAM) is typically stored in a memory cell consisting of a capacitor and a transistor. The capacitor holds a charge that represents a 1 or a 0, and the transistor controls the flow of current to the capacitor. This construction is known as Dynamic RAM (DRAM).
- There are however other types of RAM with different constructions and trade-offs. Most notably, Static RAM (SRAM) usually uses a flip-flop circuit for each bit, which typically requires ~6 transistors per bit and is generally more expensive to produce.
- While transistors are a fundamental building block of logic gates, which are the basic building blocks of computer circuits, there are also other potential electronic components involved in those circuits such as capacitors and resistors, depending on the specific gate.
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In this video, weโll be discussing the evolution of computing โ more specifically, the evolution of the technologies that have brought upon the modern computing era.
00:00 Intro
[0:30-5:33] Origins of Computing - Starting off we'll look at, the origins of computing from as far back as 3000 BC with the abacus and progressing to discuss some of the first mechanical computers. After this, we'll get to see the first signs of modern computing emerge, through the use of electromechanical relays in computers along with punched cards for data I/O.
[5:33-8:36] 1st Generation of Computing - Following that we'll discuss, the 1st generation of modern computing, the vacuum tube era. The first technology that was fully digital and resembled how modern computers operate.
[8:36-10:49] 2nd Generation of Computing - Afterwards we'll discuss, the 2nd generation of modern computing, the transistor era. The transistor miniaturized the vacuum tube and was much more efficient in terms of speed, power consumption, heat and more. It is the core technology behind how all computers operate today.
[10:49-13:04] 3rd Generation of Computing - To conclude we'll discuss, the 3rd generation of modern computing, the integrated circuit era. The integrated circuit was able to pack many transistors onto a single chip and is behind the exponential growth of modern technology.
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A whistle-stop tour of how computers work, from how silicon is used to make computer chips, perform arithmetic to how programs run and computer graphics are displayed.
Contents:
00:00 - Introduction
00:55 - Transistors
08:05 - Logic gates
11:34 - Binary numbers
16:55 - Memory and clock
24:56 - Instructions
29:30 - Loops
33:55 - Input and output
41:28 - Conclusion
**----**
Further watching if you are interested
Computerphile has many great videos, such as this in-depth look at floating point numbers:
https://www.youtube.com/watch?v=PZRI1IfStY0
For many in-depth computer subjects I highly recommend Brian Will's channel:
https://www.youtube.com/user/briantwill
Particularly his videos on graphics:
https://www.youtube.com/watch?v=bfvmPa9eWew
Today, We will be downloading and running dangerous viruses I could find on the deep web / dark web. (Most savage as well.) These malwares were created explicitly by people who want to be anonymous. This list is in no specific order and we will only be covering the most dangerous computer viruses on the dark web.
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Worried your experience with computers won't be up to university standard? This video will help you get a grip on the basic computer skills needed for study. Using Microsoft to complete assignments and learning ways to find the right information on the internet.
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Companies and countries are in a race to develop quantum computers. The machines could revolutionize problem-solving in medicine, physics, chemistry and engineering.
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