• JST BEC Male and Female Connectors

    JST BEC Male and Female Connectors

    Price: 2.28$

    Introduction

    Terminals are used to connect separate circuits together. Usually, these connectors are used in applications where switching and disconnection are often required, such as connecting power supply, connecting peripheral circuits, or extending parts that need to be replaced.

    This tutorial covers content
    In this tutorial, we will introduce the following topics

    • Common terms about terminal blocks
    • Differentiate the terminal blocks
    • Introduce the difference between the above categories
    • Describe how to use the polarity anti-reverse terminal block
    • Describe how to use the polarity anti-reverse terminal block


    Terminal terminology
    Before we start discussing some common connectors, let's explore the terminology used to describe the terminals.

    Male and female terminals – The male and female of the terminal block indicate whether it is used for insertion or insertion. (Haha, if you are still a simple child, a more detailed explanation suggests that you have to ask your parents.) Unfortunately, some terminals called males are actually used according to the female terminals. In the next example, we will explain these reasons.
    Polarity - Most terminals have a defined polarity orientation. This feature allows the terminals to be reversed.
    There are polar American wall plugs. By the two different widths of the plug blade, the plug can only enter the socket in one direction

    The contact-contact is the functional part of the terminal that actually works. They are metal parts that are in contact with one another and form an electrically conductive connection. It is also often the place where the connection is poor: the contacts may become dirty or oxidized, or the elasticity of the metal domes becomes smaller with time, which may result in loose contacts or unreliable connections.
    Spacing – Many connectors consist of a repeating set of contacts. The pitch of the connector is the distance from the center of one contact to the center of the next contact. This is important because there are many terminals that look and feel very similar to the contacts, but the spacing may be different, so often the terminals of a model series differ only because of this parameter, so it is easy to know without knowing this parameter. The purchase cannot be paired with the connection terminal.
    A number of plug-ins – The service life of the terminals is limited, and each time the terminals are connected and disconnected, some wear is caused. Datasheets usually use the number of plug-ins to indicate their service life. The number of terminals used for different technologies varies greatly. USB connectors may have thousands or tens of thousands of plug-in life, and board-to-board connectors designed for use inside consumer electronics may be limited to dozens of plug-ins. It is important to choose the terminal that fits the life of the application.
    Mating connector for the GS406 GPS module. The connector's data sheet shows that the number of insertions and removals of the part is 50.

    Installation method – this can be a bit confusing. The term “installation” refers to the following situations: how the connector is installed in use (mounted on the panel, freely suspended, board mounted), the angle of the connector relative to its attachment (right angle or right angle), how it is mechanically connected (Welde soldering, surface mount soldering, through-hole soldering). We will use the example to further discuss the installation method in the terminal block.
    Compare the different mounting methods for the three identical pipe connectors: (from left to right) board mounting, inline cable mounting, and panel mounting.

    Bend-resistant extension (to slow down strain) – When the connector is mounted on a circuit board or cable, the connections at the wire bends are often somewhat fragile. Some type of bend-resistant extension is typically provided to slow the strain to transfer any strain acting on the connector to more rational structures. There are examples of this type later.
    This 1/8" headphone jack features a strain relief "boot" that slides over the cable to prevent power on the cable from being transmitted directly to the electrical connector.


    There are two types of USB connectors: master and slave. In the USB standard, the two are different, and the connectors on the cable and device reflect this. However, all USB connectors have something in common:

    Polarization – The USB connector can only be inserted on the correct side. Unable to insert from the wrong direction, forcibly inserting the connector will not work and may cause damage.
    Four contacts – all USB connectors have at least four contacts (although some may have five, and USB 3.0 connectors have more).
    These are used for power, ground and two data lines (D + and D-). The USB connector is designed to transfer 5V, up to 500mA current.
    Shielding – The USB connector is self-contained and externally encloses a metal enclosure that is not part of the circuit. This is important to keep the signal intact in an environment with a large amount of current "noise".
    Powerful Power Connections – It is important that the power pins are connected before the data lines to avoid trying to power through the data lines. All USB connectors are designed with this in mind.
    Slow down strain – All USB cables are plastic overmolded on the connector to prevent strain on the cable that could damage the electrical connections.

    USB micro connector

    USB-Micro is a new addition to the USB connector family. Like the USB-Mini, the main concern is the problem of downsizing, but the USB-Micro adds the fifth pin to the low-speed signal, making it available for USB-OTG (On-the-go) applications, depending on the device. Set to run as a host or peripheral.

    The USB-Micro female interface can be found on many new peripherals such as digital cameras and MP3 players. USB-micro is the standard charging interface for all new phones and tablets, meaning that chargers and data lines are becoming more common, and USB-Micro has replaced USB-Mini as a small-sized USB connector.
    The USB-Micro male is also a cable-only connector. There are usually two types of cables with USB-Micro male: one for connecting a device with a USB-Micro port as a peripheral for the USB host and the other for connecting the USB-Micro female port to USB-A Mother port for devices that support USB-OTG.

    Audio connector

    Another familiar connector is the combination for audiovisual applications – RCA is commonly known as the plum head, lotus head, and record player. Although these can't really be considered as the same family, because they are similar in structure, connection, and principle, we classify them into one category.


    You may immediately recognize the 1/8" version of this connector as the plug at the end of the headset. These connectors actually have three common sizes: 6.3 inches (6.35 mm), 1/8 inch (3.5 inches), and 2.5 mm. The 1⁄4-inch connector has many uses in the professional audio and music world – most electric guitars and amplifiers have a 1/4-inch tip sleeve (TS) jack and a 1/8-inch tip-ring-sleeve (TRS) structure. The connector for the output signal is very common as an MP3 player or a headset or stereo on a computer. Some phones will provide a 2.5 mm tip-ring-ring-sleeve (TRRS) jack for connecting headphones, which also includes Microphone for hands-free calling.

    The universal availability of these connectors and cables makes them a good choice for universal connectivity applications – for example, Texas Instruments' graphics calculators used 2.5mm TRS connectors as serial programming connectors long before USB. It should be remembered that the tip-sleeve connector type is not available for transmission power; the tip and sleeve may be shorted together for short periods of time during insertion, which may damage the power supply. Insufficient shielding makes them unsuitable for high-speed data, but low-speed serial data can use these connectors.

    RCA connector

    RCA, commonly known as plum head and lotus head, is the preferred home stereo connector for decades and was introduced into the home phonograph by RCA in 1940. It is gradually being replaced by HDMI and other connections in the audiovisual field, but the ubiquitous connectors and cables make it an ideal choice for home systems. It has been in service for a long time.

    The female RCA connector is usually found on the device, but an extension cable or adapter cable with a female jack can be found. Most RCA connectors are connected to one of four signal types: component video (PAL or NTSC, depending on where the device is sold), composite video, stereo audio or S/PDIF audio.

    Power connector

    While many connectors carry power in addition to data, some connectors are designed to provide a power connection to the device. These vary by application and size, but we only focus on some of the most common parts.

    DC-DC power plug and socket

    DC-DC power plugs and sockets are commonly used in low-cost consumer electronics and can be plugged into wall power through large AC power adapters. Wall adapters are widely used for a wide range of power ratings and voltages, making DC-DC power plugs and sockets a common means of connecting power to small projects.

    DC-DC power outlets or jacks can be purchased in a variety of types: PCB mounting (surface mount soldering or through-hole soldering), cable mounting or board mounting. Some of these connectors will have additional contact points to allow the application to detect if power is plugged into the cylindrical jack, allowing the device to bypass the battery while running on an external power source and save battery life.
    The barrel connector provides only two connections, commonly referred to as "pins" or "tips" and "sleeves." When ordering, the barrel connection has three different features – the inner diameter (the diameter of the pin inside the socket), the outer diameter (the diameter of the outer sleeve of the plug) and the polarity (whether the sleeve voltage is above or below the tip voltage).

    The sleeve diameter is usually 5.5 mm or 3.5 mm.

    The pin diameter depends on the sleeve diameter; a 5.5 mm sleeve will have a 2.5 mm or 2.1 mm pin. Unfortunately, this means that plugs designed for 2.5mm pins will be installed in 2.1mm jacks, but connections can only be intermittent. The 3.5 mm socket plug is usually mated with a 1.3 mm pin jack.

    Polarity is the last aspect to consider; typically, the bushing will be considered 0V and the tip will become a positive voltage relative to the bushing. Many devices will have a small icon indicating the desired polarity of the device; care should be taken to comply with this, as incorrect power polarity can damage the device.

    The length of the two sleeve sizes is typically 9.5 mm, but longer and shorter sleeves do exist. Most products use a positive 5.5 mm sleeve and a 2.1 mm lead; we recommend adhering to the standard as much as possible because it is easier to repair and replace.

    "Molex" terminal

    Most computer hard drives, optical drives, and other internal peripherals are powered by what is commonly referred to as the "Molex" terminal. To be more accurate, it is a Molex Series 8981 connector – Molex is actually the name of the company that originally designed this connector in the 1950s.

    Molex connectors are designed to carry large amounts of current: up to 11A per pin. For projects that may require high power (such as CNC machines or 3D printers), a common method of powering a project is to use a desktop PC power supply and connect various system circuits through a Molex connector.

    The Molex terminal is a somewhat anomalous example of the term male and female. The female terminal is typically located at the end of the cable and slides within the plastic housing surrounding the pin within the male terminal. Normally, the connectors can only be pressed in, very very tight – in order to ensure a firm and reliable connection, they can only be connected and disconnected dozens of times, so this is not a good choice for systems with frequent disconnects.

    JST connector

    In our Arduino project, the "2.0mm JST connector" is often mentioned. This is another promotion of a specific product – JST is a Japanese company that produces high-quality connectors, and the 2.0mm JST connector is a PH series dual position polarity connector.

    Many single-cell Li-Ion-ion batteries come standard with this JST connector, and many boards include this connector (or its pad hole) as a power input. It has the advantages of compact structure, durability, and anti-reflection. Another feature that may be an advantage or a disadvantage depends on how you look at it because the JST connector is difficult to disconnect after insertion (although careful application of the diagonal pliers can help!). Although this makes it impossible to malfunction during use, it also means that disconnecting the battery can easily damage the battery connector.

    Female connector

    The female connector contains several different connections. In general, one side is a series of pins soldered to the PCB that can be at right angles to the PCB surface (commonly referred to as "straight lines") or parallel to the board surface (easy to be called "right" - "corner" ). Such connectors appear at various spacings (e.g., 2.54 mm and 2 mm) and can have any number of separate pins.
    The most common pin headers are 0.1-inch single or double row connectors with pin headers or busbars and are connectors for connecting the Arduino board to the shield. Other spacing is not uncommon, such as the XBee wireless module using a 2.0mm pitch series of the same connector.
    A common variant of this part is the version of the round hole pin. Although the normal version is made of stamped and folded sheet metal, the round hole pin is formed by machining the metal into the desired shape. The result is a stronger connection with better joints and longer life but at a higher cost.
    For round hole headers, please note that these connectors are designed to be split into smaller sections, while standard 0.1" female connectors are not. It should also be noted that not all non-machine needle connectors will be used with the machine pins.

    The cables connected to these pin headers are typical of one of two types: a single wire with a crimp connector or a ribbon cable with an insulation displacement connector. These can simply be clipped at the end of the cable DuPont wire to form a connection to each conductor in the ribbon cable. Normally, the DuPont line can only be used as a female and it is expected that the male pin header will be paired with it.
    For round hole headers, please note that these connectors are designed to be split into smaller sections, while standard 0.1" female connectors are not. It should also be noted that not all non-machine needle connectors will be used with the machine pins.

    Screw terminal block

    In some cases, it may be necessary to connect bare wires to the circuit. Screw terminals provide a good solution for this. They are also suitable for situations where the connection should be able to support many different connected devices.

    The disadvantage of screw terminals is that they can be easily unwound, leaving a bare wire in the circuit. A small amount of hot glue can solve this problem without being too difficult to remove in the future.

    Screw terminals are usually designed for a narrow range of wires, too small and too large. There are two types of screw terminals available in 0.1" and 3.5mm versions. Most screw terminals are highly modular and can easily be expanded at the same spacing by simply joining two or more smaller sections together.
    – > 3.5 mm pitch screw terminals, showing the insertion point of the conductor to be connected, the screw fixing the wire and the modular connector on the side of the single unit, can be combined together.


    Most power test equipment (multimeters, power supplies) have a very simple connector called a "banana socket." These paired "banana plugs", crimped, spring metal plugs, mean a single power connection. They are often available in a stackable configuration and can be easily connected to any type of wire. They are capable of carrying several amps of current and are inexpensive.

    Crocodile clip

    The reason for the naming is obvious. The alligator clip is suitable for test connections on terminals or bare wires. They tend to be bulky, easily short-circuited to nearby bare metal, and have relatively poor grip, which tends to damage certain joints. They are primarily used for low-cost connections during commissioning.
    The "third hand" tool uses an alligator clip to clamp the workpiece and clamps the wire with an alligator clip for electrical testing. Please pay attention to the plastic sleeve around the alligator clip to prevent other connections from being shorted.

    IC chip (or IC hook)

    For more sophisticated probing operations, there are various IC clips on the market. These dimensions allow the user to clip it to the pins of the IC without touching adjacent pins; some of them are very delicate and can even be clipped to the fine pitch SMD component legs. These smaller clips can be found on logic analyzers and test leads, which is very useful for prototyping or troubleshooting circuits.
    Standard 8p8c (8-bit, 8-core) "RJ45" modular jack. Please note that if you plan to use these jacks to transmit DC signals and power, you must avoid using connectors with built-in signal transformers.

    D-sub connector

    Named after the shape of its casing, the D subminiature connector is the classic standard in the computing world. There are four very common varieties of this connector: DA-15, DB-25, DE-15, and DE-9. The pin number indicates the number of connections provided, and the letter combination indicates the size of the case. Therefore, DE-15 and DE-9 have the same housing size but with different numbers of connections.

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