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• 14:39, 22 February 2024 Philip talk contribs created page Glossary:TLS (Created page with "TLS or Transport Layer Security is a standard for securing data over a TCP data stream. It offers encryption using a shared key derived using a secure key exchange mechanism, and allows one or both ends to identify themselves using digital certificates. It has superceded SSL, but "SSL" is still often used to describe a link actually secured by TLS.")
• 12:54, 22 February 2024 Philip talk contribs created page Glossary:SSL (Created page with "SSL or Secure Sockets Layer is a deprecated standard for securing data over a TCP data stream. It offers encryption using a shared key derived using a secure key exchange mechanism, and allows one or both ends to identify themselves using digital certificates. SSL went through several major versions, but 3.0 was deprecated in 2015 and has been superseded by TLS. Nevertheless, "SSL" is still often used to describe a link actually secured...")
• 16:38, 20 February 2024 Philip talk contribs created page Glossary:IMAP (Created page with "If you manage your email using a program or app on your own device (rather than using webmail) then IMAP or Internet Message Access Protocol provides a method by which your program or app can manage your email, optionally organised into different folders, held on a remote email server, and to retrieve emails as required.")
• 16:11, 20 February 2024 Philip talk contribs created page Glossary:POP3 (Created page with "If you manage your email using a program or app on your own device (rather than using webmail) then POP3 or Post Office Protocol 3 is a method by which your program or app retrieves incoming emails from an email server for storage on your device.")
• 16:11, 20 February 2024 Philip talk contribs created page Glossary:SMTP (Created page with "If you manage your email using a program or app on your own device (rather than using webmail) then SMTP or Simple Mail Transfer Protocol is the method by which your program or app submits outgoing email to a mail server.")
• 16:00, 20 February 2024 Philip talk contribs created page Glossary:Http/https (Created page with "http or Hypertext Transfer Protocol is the method by which a web browser requests and receives web pages from a web server. It is now largely superceded by https, which transmits requests and replies in encrypted form.")
• 21:39, 19 February 2024 Philip talk contribs created page Glossary:Entropy (Created page with "Entropy (in information theory) is the amount of information or uncertainty in a piece of data, usually measured in bits. For example a 3 digit PIN or combination lock has 1,000 possible values and so has almost 10 bits of entropy, because 10 bits allows you to count up to 1,024. The entropy of a password or encryption key can be used directly to estimate how long it might take to crack, by trying all possible values.")
• 21:14, 19 February 2024 Philip talk contribs created page Glossary:Signal to Noise Ratio (Created page with "The Signal to Noise (or S/N) ratio is a measure of the strength of a signal compared to any background noise or interference, and is measured in decibels (dB). In an audio system, a high S/N ratio tells you that any background hiss will be imperceptible, and in data communications, the S/N ratio directly affects the rate at which you can transmit data.")
• 21:14, 19 February 2024 Philip talk contribs created page Glossary:Decibel (Created page with "Decibels (dB) are a measure of relative power, for example by what factor does an amplifier increase the power of a signal, or by what factor is a TV signal reduced by losses in the cable between the aerial and the receiver. It's a logarithmic scale, 3dB representing a doubling of power, hence the dB gains or losses in a signal path can simply be added.")
• 17:52, 19 February 2024 Philip talk contribs created page Glossary:Noise (Created page with "Noise, in the context of electronics and communications, is any unwanted interference tending to mask a desired signal. It can never be eliminated entirely as the electronics we're surrounded with all generates a certain amount of interference, and an electric current itself consists of a random flow of electrons.")
• 17:40, 19 February 2024 Philip talk contribs created page Glossary:Metadata (Created page with "Metadata is "data about data". For example, a document or spreadsheet may contain information about the author; a digital camera will normally embed information about the exposure, location, date and time of a photo. Sharing these or other types of file can result in undesirable information leakage and privacy issues if you're not aware of the metadata they may contain.")
• 17:24, 19 February 2024 Philip talk contribs created page Glossary:Decoupling capacitor (Created page with "Variations in the current drawn by one part of a circuit can affect the voltage of the supply, hence affecting another part of the circuit. "Decoupling capacitors" are commonly connected to a supply at various points in order to absorb these variations and minimise any such unwanted and detrimental couplings.")
• 11:46, 17 February 2024 Philip talk contribs created page Glossary:Webmail (Created page with "Webmail is the method of managing your email entirely through a web page offered by your email provider, who stores your email on their own servers. The alternative is to manage your email through an applicationon your own device, which can give you greater flexibility in organising, searching and archiving your email.")
• 11:10, 17 February 2024 Philip talk contribs created page Glossary:Right to Repair (Created page with "R2R or Right to Repair is the movement and campaign to make repair options widely available at reasonable cost, and to outlaw practices which unnecessarily make repair uneconomic, difficult or virtually impossible. Such practices include non-availability or exhorbitant cost of spare parts or service information, manufacturing methods making disassembly difficult, and parts pairing or software locks restricting repair to the manufacturer or their authorised agents. These...")
• 11:33, 15 February 2024 Philip talk contribs moved page MPP inverter to Glossary:MPP inverter without leaving a redirect
• 11:30, 15 February 2024 Philip talk contribs created page MPP inverter (Created page with "Getting the most power out of a PV (or solar) cell or wind turbine isn't straightforward. The output voltage will be maximum if you draw hardly any current, and if you draw as much current as you can the output voltage will drop almost to zero. In either case the power delivered (voltage × current) will be minimal. An MPP or Maximum Power Point controller or inverter will continuously adjust the current drawn in order to maximise the power, for exam...")
• 10:03, 14 February 2024 Philip talk contribs created page Glossary:EV (Created page with "An EV or Electric Vehicule is any kind of vehicle more conventionally powered by fossil fuels, but designed instead to be electrically powered.")
• 09:56, 14 February 2024 Philip talk contribs created page Glossary:ALU (Created page with "An ALU or Arithmetic and Logical Unit is that part of a CPU that actually performs arithmetic and logical operations, as commanded by and on data supplied to it by executive functions within the CPU. The 74181 is an early example of a 4-bit ALU implemented as a single silicon chip.")
• 09:42, 14 February 2024 Philip talk contribs created page Glossary:Unbrick (Created page with "A device is said to be "bricked" if it has been rendered non-functional, perhaps by loading the wrong firmware. "Unbricking" is the (sometimes difficult) process of restoring it to normal operation.")
• 17:12, 10 February 2024 Philip talk contribs created page Glossary:Ladder logic (Created page with "Ladder logic is a kind of simple graphical programming language with its roots in relay logic, formerly much used for the control of industrial plant and machinery, but still used by PLCs in similar applications. More details are given in the Ladder logic.")