We changed our privacy policy. Read more.
19

To elaborate on ratchet freak's answer; CD-ROMs work by sensing the intensity of the light reflected from the CD as it is spinning. More light being reflected stands for a 1 and less light being reflected stands for a 0 (or vice versa). One way to encode the information would be to have highly reflective surfaces for the 1's and dark patches for the 0's. ...


11

Because of optical interference. When the laser is fully in a pit or fully on land then it gets reflected cleanly and will be picked up by the sensor. However, on the transition, half the laser is in the pit and half is in the land and the reflections will interfere with each other and the sensor won't pick anything up. The pit depth and laser color (...


9

The transistor The transistor was the revolutionary replacement of the vacuum tube, which had been at the heart of computers for the first half of the 20th century. Vacuum tubes themselves had only two main problems: They were power-hungry and they were relatively big. Relative to their replacements, that is. They also had a tendency to burn out or leak ...


8

I'm still confused about what you mean by "engineering advances". To me, things like vacuum tubes, transistors and ICs are technologies, and engineering is all about applying those technologies to real-world problems, such as building computers. Engineers have typically taken each available technology to its practical limit — to the point where other ...


5

HDE 226868 already mentioned the transistor in detail, so I will add many, many technological advances and theoretical backgrounds for the evolution of the computer. Metallurgy For the mass-market you need cheap and reliable methods to produce the desired electronic elements. For mass production you need integrated circuits and that means, especially if you ...


3

I would research component manufactures web sites. It is highly unlikely that you will find all the information in on location. Here our example web site links to get started. NZXT - Mini ITX Computer cases Fractal Era ITX Computer cases Mini-ITX Mainboard Specification Hydro Series™ H100i RGB PLATINUM 240mm Liquid CPU Cooler Another good place to look for ...


3

Looks like a square to me - are you sure you selected the pixel checkmark, and also unchecked the "Maintain aspect ratio" box before typing in your second '500'?


3

Well, I would think that two smaller ones rigged up in an "amateurish" fashion (apologies, but that's we both are, right) are going to be worse than just one (sufficiently large) properly mounted heatsink. That giant triangular piece closest to the CPU would probably delay heat transfer -- even if you have excellent cooling on the other side of it. What I ...


3

Another option would be to use a vacuum cleaner, that way any dirt is not pushed inside the computer but its pulled outside.


2

Possibly this is a slightly old question... An "introduction to control theory" course sounds unlikely to cover this stuff, but one of the control courses in the Masters' year I'm in right now includes topics that might be of interest to you: Convex optimisation Semi-definite programming to guarantee stability Distributed algorithms (most ...


2

Basic control theory is very useful in a wide range of situations. Really advanced control theory is specialized and useful to theory and complex design of certain actual control systems. I had math in grad school, and EE undergrad, worked as a Systems Engineer. I had control theory in both undergrad and grad school. I do not see any use for control theory ...


2

The keyboard contains many switches (100 in my keyboard at this moment) and the simplest solution for a keyboard assembly that contains no decoding circuitry would be for each switch to have its own line going to the motherboard, plus one common ground. This is inefficient. The simplest scheme to minimize the burden of all those wires in the interconnect ...


1

In principle this should work fine. According to https://reference.epson-biz.com/modules/ref_escpos/index.php?content_id=82 the commands to drive the printer are just combinations of ASCII control characters like ESC, FS, GS, etc, which can be transmitted to the printer exactly the same way as "ordinary" printable letters and numbers. A complete table of ...


1

This makes little sense to do on the scale of a single computer that may draw 100 W. However, this has been done on the scale of whole buildings. Buildings that are designed expecting high power dissipation in some rooms but not others often have air conditioners or heat pumps for cooling/heating individual rooms or small zones. These tie to building-wide ...


Only top voted, non community-wiki answers of a minimum length are eligible