15 September 2022

• 09:2409:24, 15 September 2022 diff hist +125‎ N Glossary:Emitter, Base, Collector ‎ Created page with "The emitter, base and collector are the three terminals of a junction or bipolar transistor."
• 09:1309:13, 15 September 2022 diff hist +214‎ Glossary ‎ →‎Glossary of Terms
• 09:1109:11, 15 September 2022 diff hist +334‎ N Glossary:Saturation (magnetic) ‎ Created page with "A magnetic material such as iron is said to be saturated when it cannot be magnetised any more. This is undesirable in a transformer or an inductor as its performance is then reduced. But in digital magnetic recording (in a hard disk or a digital tape) the surface is deliberately saturated in order to reliably record ones and zeros." current Tag: Visual edit
• 09:0409:04, 15 September 2022 diff hist +54‎ Glossary:Saturation (transistor) ‎No edit summary current Tag: Visual edit
• 08:5908:59, 15 September 2022 diff hist +368‎ N Glossary:Saturation (transistor) ‎ Created page with "When a junction transistor used as a switch in a digital circuit is turned on as hard as it will go it is said to be saturated. In this condition there is excess charge in the collector region, and this has to drain away before the transistor will switch off again. This limits the speed at which it can switch, and so saturation is a condition designers try to avoid."
• 08:5308:53, 15 September 2022 diff hist +443‎ Glossary ‎ →‎Glossary of Terms
• 08:4408:44, 15 September 2022 diff hist +118‎ Glossary:Saturation (colour) ‎No edit summary current Tag: Visual edit
• 08:4308:43, 15 September 2022 diff hist +118‎ Glossary:Luminance ‎No edit summary current Tag: Visual edit
• 08:4308:43, 15 September 2022 diff hist +118‎ Glossary:Chrominance ‎No edit summary current Tag: Visual edit

14 September 2022

• 21:3721:37, 14 September 2022 diff hist +56‎ Glossary:Chrominance ‎No edit summary Tag: Visual edit
• 21:3621:36, 14 September 2022 diff hist +66‎ Glossary:Luminance ‎No edit summary Tag: Visual edit: Switched
• 21:3421:34, 14 September 2022 diff hist +562‎ N Glossary:Saturation (colour) ‎ Created page with "The saturation of a colour is its purity. This can be used together with the chrominance (the hue) and the luminance (the brightness) as an alternative to specifying the red, green and blue (RGB) components. This is useful because the eye perceives variations of chrominance and saturation across an image much less sharply than variations of luminance. Hence these latter can be presented at lower definition..." Tag: Visual edit
• 21:3121:31, 14 September 2022 diff hist +524‎ N Glossary:Chrominance ‎ Created page with "Chrominance is the hue of a colour. This can be used together with the luminance (the brightness) and the saturation (the purity of the colour) as an alternative to specifying the red, green and blue (RGB) components. This is useful because the eye perceives variations of chrominance and saturation across an image much less sharply than variations of luminance. Hence these latter can be presented at lower definition with no visible degradation in the ima..." Tag: Visual edit
• 21:3021:30, 14 September 2022 diff hist −88‎ Glossary:Luminance ‎No edit summary Tag: Visual edit
• 21:2521:25, 14 September 2022 diff hist +612‎ N Glossary:Luminance ‎ Created page with "A colour in an image or video can most simply be defined by its red, green and blue (RGB) components, but in principle any 3 independant properties can be used. Another way is by specifying its luminance (brightness), its chrominance (the hue of the colour) and its saturation (the pureness of the colour). This is useful because the eye perceives variations in luminance across an image much more sharply than variations of chrominance or saturation. Hence..." Tag: Visual edit: Switched
• 21:1121:11, 14 September 2022 diff hist +18‎ Glossary:CMY ‎No edit summary current Tag: Visual edit
• 21:1121:11, 14 September 2022 diff hist +253‎ N Glossary:CMYK ‎ Created page with "Rather than the primary colours red, green and blue, printers use the complementary colours cyan, magenta and yellow (referred to as CMY) but also black to darken a pixel as required. This is then referred to as CMYK." current Tag: Visual edit
• 21:0621:06, 14 September 2022 diff hist +543‎ N Glossary:CMY ‎ Created page with "A colour image or video can be represented by the red, greeen and blue (RGB) primary colours added together in appropriate proportions, but this doesn't work for printing, since each colour ink subtracts a range of colours from the incident white light rather than adding anything. So printers use the complementary colours Cyan (green + blue, absorbing red light), Magenta (blue + red, absorbing green light) and Yellow (red + green, absorbing blue light). In practice, prin..." Tag: Visual edit
• 20:5520:55, 14 September 2022 diff hist +85‎ N Glossary:RGB ‎ Created page with "RGB refers to the separate red, green and blue components of a colour image or video." current Tag: Visual edit
• 20:5320:53, 14 September 2022 diff hist +43‎ Glossary:NIC ‎No edit summary current Tag: Visual edit
• 20:5220:52, 14 September 2022 diff hist +360‎ N Glossary:NIC ‎ Created page with "A NIC or Network Interface Controller is the part of a computer or router that connects it to a network. Formerly it was often a separate add-on card but nowadays it's nearly always buit-in to the computer unless an extra one is needed. A computer connected to more than one network or a router has a NIC for each network, and each must have its own IPAddress."

12 September 2022

• 15:4715:47, 12 September 2022 diff hist +123‎ Sandbox ‎No edit summary Tag: Visual edit: Switched
• 11:5811:58, 12 September 2022 diff hist +267‎ Glossary:USB ‎No edit summary current Tag: Visual edit
• 09:4909:49, 12 September 2022 diff hist +227‎ Glossary ‎ →‎Glossary of Terms
• 09:1409:14, 12 September 2022 diff hist 0‎ m Glossary:DVI ‎ Philip moved page DVI to Glossary:DVI without leaving a redirect current
• 09:0909:09, 12 September 2022 diff hist +285‎ N Glossary:DisplayPort ‎ Created page with "DisplayPort is a standard for carrying digital video from a source such as a computer to a display. It can also carry digital audio, USB and other types of data. The connectors are rectangular but with one corner shaved off. There are also mini and micro versions." current Tag: Visual edit
• 08:5708:57, 12 September 2022 diff hist +43‎ m Glossary:DVI ‎No edit summary Tag: Visual edit
• 08:5508:55, 12 September 2022 diff hist +437‎ N Glossary:DVI ‎ Created page with "DVI is a standard for carrying analogue and/or digital video from a source (most commonly a computer) to a display device. It uses a connector which is almost rectangular, but with two corners on the same long edge slightly rounded. The connectors can accommodate 3 rows of 8 pins plus an extra 4 in a separate group for analogue video, but the number actually present varies according to the type and number of video channels supported."
• 08:4208:42, 12 September 2022 diff hist +299‎ N Glossary:HDMI ‎ Created page with "HDMI is a standard for carrying digital video and audio from a source such as a computer or a TV tuner to a display device such as a flat screen monitor or a projector. It uses a connector in standard, mini and micro sizes, all shaped as a rectangle with two chamfered corners on the same long edge." current
• 08:2908:29, 12 September 2022 diff hist +279‎ N Glossary:VGA ‎ Created page with "VGA (or Video Graphics Adapter) the the oldest, yet still very widely used standard for connecting a video monitor to a computer. It uses a 15 pin D-shaped connector carrying separate analogue signals representing the red, green and blue picture components." current
• 08:2108:21, 12 September 2022 diff hist +12‎ m Glossary:ESP ‎No edit summary current Tag: Visual edit

11 September 2022

• 21:3221:32, 11 September 2022 diff hist +50‎ Glossary ‎No edit summary Tag: Visual edit: Switched
• 21:2621:26, 11 September 2022 diff hist +276‎ N Glossary:USB ‎ Created page with "USB or Universal Serial Bus is a method of connecting a wide range of peripheral devices to a computer, such as keyboards and mice, storage devices and many more. Several revisions of the standard from USB 1.0 to USB 4 have successively increased its data transfer capability."
• 18:5718:57, 11 September 2022 diff hist +65‎ Glossary ‎No edit summary Tag: Visual edit: Switched
• 18:5518:55, 11 September 2022 diff hist +124‎ N Glossary:Electret ‎ Created page with "An electret is a material having a permanent built-in electric charge, like the electrical equivalent of a permanent magnet." current Tag: Visual edit

10 September 2022

• 09:3009:30, 10 September 2022 diff hist 0‎ Sandbox ‎No edit summary Tag: Visual edit

9 September 2022

• 17:2117:21, 9 September 2022 diff hist +672‎ Glossary ‎No edit summary Tag: Visual edit: Switched
• 17:1917:19, 9 September 2022 diff hist +377‎ N Glossary:Memory effect ‎ Created page with "The memory effect is the property of some types or rechargeable batteries to "remember" if they have frequently been only partially discharged. They can then become reluctant to deliver more charge in future. The cure is to fully dischage then fully recharge them periodically. NiCd batteries are particularly prone, and NiMH rather less so." current Tag: Visual edit
• 17:0217:02, 9 September 2022 diff hist +1‎ Glossary:VSWR ‎No edit summary current Tag: Visual edit
• 17:0017:00, 9 September 2022 diff hist +40‎ Glossary:Fibre Optics ‎No edit summary current Tag: Visual edit
• 16:4316:43, 9 September 2022 diff hist +563‎ N Glossary:Fibre Optics ‎ Created page with "If you feed light into the end of a thin glass or transparent plastic fibre, it will be constrained to the fibre by total internal reflection and emerge at the far end, even if the fibre is many miles long. Furthermore, with high quality fibre the losses can be much less than with an electrical cable, and light can carry vastly more data than an electrical signal. Fibre optics is the application of this principle, together with the ancilliary lasers or Glossary:LED|LED..." Tag: Visual edit
• 16:2716:27, 9 September 2022 diff hist +537‎ N Glossary:Waveguide ‎ Created page with "At the highest frequencies (GHz and above), every bit of wire acts like an aerial, so you can no longer rely on sending a signal down a wire and expecting it to get to the other end. So why not let it do its thing? Feed it into an aerial at the end of a copper pipe and it'll bounce all the way down the inside and come out at the far end. This is what a waveguide is. A microwave oven contains a waveguide to feed the energy from the..." current Tag: Visual edit
• 16:1416:14, 9 September 2022 diff hist +677‎ N Glossary:Quantum Computer ‎ Created page with "Don't worry, you may never have to fix one of these. One of the predictions of Quantum Mechanics is that sub-atomic particles can effectively be in more than one state at a time. In theory, you should be able to use this property to build a computer that explores many possible solutions to a problem simultaneously rather than trying them one by one, as a normal computer would. This could be really neat for cracking cryptographic codes, or w..." current Tag: Visual edit
• 15:5415:54, 9 September 2022 diff hist +322‎ N Glossary:Quantum Mechanics ‎ Created page with "Quantum Mechanics (or QM for short) is the counter-intuitive theory of how things behave at the atomic and sub-atomic levels. It has passed every test physiscists have thrown at it, yet nobody understands it, only how to use its predictions to design lasers and silicon chips and al the modern gadgets that depend on them." current Tag: Visual edit
• 15:4215:42, 9 September 2022 diff hist +739‎ N Glossary:VSWR ‎ Created page with "If you connect a transmitter to an aerial via a long cable, at any discontinuity in the cable, some of the energy will be reflected back towards the transmitter instead of reaching the aerial. At some points between the transmitter and the discontinuity, the phases of the reflected and outgoing waves will reinforce and at other points they will partially cancel, creating "standing waves". The Voltage Standing Wave Ratio or VSWR is the ratio of the highest to the lowest v..." Tag: Visual edit
• 15:1815:18, 9 September 2022 diff hist +324‎ Glossary:Kirchoff's Laws ‎No edit summary current Tag: Visual edit
• 15:0415:04, 9 September 2022 diff hist +291‎ N Glossary:Kirchoff's Laws ‎ Created page with "You can calculate the voltages and currents in a simple circuit with Ohm's Law, but not for more complex circuits (such as a decorative net curtain of LEDs). Kirchoff's Laws allow you to write down a series of simultaneous equations which you can solve to find all the voltages and currents."
• 14:5914:59, 9 September 2022 diff hist +292‎ N Glossary:Black Box ‎ Created page with "Often, a complex system can be broken down into several subsystems. So long as you know the inputs and the outputs of a sybsystem and how they're related, you can understand the whole system by regarding that subsystem as a "black box", without considering, or even knowing what's inside it." current
• 12:3312:33, 9 September 2022 diff hist +310‎ N Glossary:Collet ‎ Created page with "A collet is a device for holding a spindle or a rotary tool such as a drill. It consists of a hollow metal cylinder with several slits along part of its length. It is sized so that the tool is a sliding fit inside it. The slits then allow it to be squeezed by some mechanism in order to securely grip the tool." current
• 12:2212:22, 9 September 2022 diff hist +53‎ Glossary ‎No edit summary Tag: Visual edit: Switched