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Evans, Bill (2011). Live sound fundamentals. Course Technology. pp. 24, 29. ISBN 978-1-4354-5494-1. Sometimes both ends of a cable are terminated with the same gender of connector, as in many Ethernet patch cables. In other applications the two ends are terminated differently, either with male and female of the same connector (as in an extension cord), or with incompatible connectors, which is sometimes called an adapter cable. USB connectors come in two flavors: host and peripheral. In the USB standard, there is a difference between the two, and the connectors on cables and devices reflect this. However, all USB connectors will have some things in common: Field Installable: The secret to mastering connectors". Design Spark. RS Components. 16 March 2017. Solder connectors . Retrieved 1 July 2019. a b "Molex Connectors Explained, as used in Pinball". Marvin's Marvelous Mechanical Museum. 4 March 2005 . Retrieved 1 July 2019.
Splice or butt connectors (primarily insulation displacement connectors) that permanently join two lengths of wire or cable While wires may be crimped, they should not be heavily tinned with solder prior to installation in a screw terminal, since the soft metal will cold flow, resulting in a loose connection and possible fire hazard. [ citation needed] Screw connectors sometimes come loose if not done up tightly enough at fitting time. Verifying adequate tightening torque requires calibrated installation tools and proper training. In the UK, all screw connectors on fixed mains installations are required to be accessible for servicing, for this reason. [ citation needed] Advantages and disadvantages [ edit ] Two types of screw terminals showing a significant development in design. Basic, with the wires held between the screw heads and the terminals (left) and with the wires held, reversely, between the metal clamping plates and the rear of the terminals (right). Screw terminals are used extensively in building wiring for the distribution of electricity - connecting electrical outlets, luminaires and switches to the mains, and for directly connecting major appliances such as clothes dryers and ovens drawing in excess of 15 amperes. Depending on the design, a flat-blade screwdriver, a cross-blade screwdriver, hex key, Torx key, or other tool may be required to properly tighten the connection for reliable operation. Shielding - USB connectors are shielded, such that a metal shell which is not part of the electrical circuit is provided. This is important to keep the signal intact in environments with a lot of electrical "noise".
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a b Horowitz, Paul; Hill, Winfield (1989). The Art of Electronics (2nded.). Cambridge University Press. ISBN 0-521-37095-7. IEC connectors are used almost exclusively for AC power input. The nice thing about using one on a project is that IEC-to-wall cables are extremely common and available with localized wall plugs for most international locations! JST Connector a b Elliott, Brian S. (2007). "Chapter 9: Connectors". Electromechanical Devices & Components (2nded.). McGraw-Hill Professional. ISBN 978-0-07-147752-9.
The above two connectors were designed to be used together, but there was a problem with this configuration and the FCC started moving towards Part 15 compliance. All this means is that all the SMA RF connectors are changing gender (center pin). Really annoying for those of us who need to mate an antenna to an RF device. The FCC gender change was instituted to prevent home users from damaging RF equipment (think home WiFi) when screwing on an antenna. If all antennas are female, there is no way to damage the center connector. The wire may be wrapped directly under the head of a screw, may be held by a metal plate forced against the wire by a screw, or may be held by what is, in effect, a set screw in the side of a metal tube. The wire may be directly stripped of insulation and inserted under the head of a screw or into the terminal. Otherwise, it may be either inserted first into a ferrule, which is then inserted into the terminal, or else attached to a connecting lug, which is then fixed under the screw head. See also: FASTON terminal Blade connectors (lower half of photo). Ring and spade terminals (upper half). Bullet terminals, male and female (right-center, with blue wires) A disadvantage of the circular design is its inefficient use of panel space when used in arrays, when compared to rectangular connectors.SparkFun uses SMA-type connectors on a few boards that need a 50 Ohm impedance connection to an external antenna ( GPS, Bluetooth, cellular, Nordic, and XBee). However, some of these boards use different genders and polarities of the SMA connector. Therefore, we need different antennas to match the specific gender or polarity of the RF connections. a b "Essential Connector Terms and Definitions for Specifiers of Interconnect Wiring Systems" (PDF). Glenair, Inc. 2004 . Retrieved 2019-06-25.
Screw terminals are low in cost when compared to other types of connectors, and can be readily designed into products for circuits carrying currents of from a fraction of an ampere up to several hundred amperes at low to moderate frequencies. The terminals easily can be re-used in the field, allowing for the replacement of wires or equipment, generally with standard hand tools. Screw terminals usually avoid the requirement for a specialized mating connector to be applied to the ends of wires.
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Endres, Herbert (19 December 2011). "Gold or Tin versus Gold and Tin?". Molex . Retrieved 1 July 2019. Foreman, Chris, "Sound System Design", Handbook for Sound Engineers, Third Edition, Glen M. Ballou, Ed., Elsevier Inc., 2002, pp.1171–72. However, with the clamping plate type of screw terminal this time is reduced, since it is necessary only to insert the stripped wire between the terminal and the rear clamping plate then tighten the connection, using the screw to clamp the wire between the terminal and the clamping plate, without any need properly to wrap it around the screw head.
Alternatives to screw terminals include spring terminals (a.k.a. "push-in", "cage-clamp", or "poke-home" connectors). Spring terminals work in a similar fashion as screw terminals. However, instead of tightening a screw to make a connection with piece of wire, a spring clamps together pieces of metal together. a b c d e f Connectors – Technologies and Trends (PDF). ZVEI – German Electrical and Electronic Manufacturers’ Association. August 2016. a b c Worley, Jon (31 July 2018). "Circular Connector Terminology Guide". NYK Component Solutions . Retrieved 2018-10-15. a b David Brearley (9 October 2015). "Would you trust your life to a 50-year old connector design?". Connector Tips . Retrieved 27 June 2019. There are many ways of applying a connector to a cable or device. Some of these methods can be accomplished without specialized tools. Other methods, while requiring a special tool, can assemble connectors much faster and more reliably, and make repairs easier.
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Screw terminals, as individual connectors to a board at left, as a barrier strip with setscrews at top, and as a barrier strip with attached spade and loop lugs at bottom. PCB mount connectors soldered to a printed circuit board, providing a point for cable or wire attachment. [6] :56 (e.g. pin headers, screw terminals, board-to-board connectors) Grounding screws are often color-coded green and, when used on consumer electronics, often have a washer with gripping "teeth", to ensure better connections. This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Really, you can ignore the gender descriptor. If you have a RP-SMA board or module, you need a RP-SMA antenna and so forth for SMA. Pretty simple, right?! Just make sure to match the antenna frequency with the your board.
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