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Jumper wires are short lengths of insulated electrical wire with pre-crimped leads and terminal pins on both ends. They are used to connect two separate electronic components or circuits together, allowing current to pass from one to the other. Jumper wires can come in a variety of thicknesses, lengths, and colors, making them suitable for different applications and helping them to stand out from other wires and cables.

In the field of electrical engineering, jumper wires are used in a variety of applications. They are often used in prototyping and troubleshooting electronic circuits, as they provide a cost-effective and convenient way of connecting two components. In addition, they are used to connect circuit boards together and to bridge open-circuit test points on circuit boards. They are also used to connect test probes for measuring current and voltages and to connect redundant power supplies between different systems. Lastly, jumper wires are used in microcontroller programming, in which individual pins must be connected to the microcontroller for programming operations.

The working principle of jumper wires is quite simple. When connected between two components, the wire facilitates an electrical current flow from one to the other. The wire’s insulation consists of a plastic or rubber coating, which prevents the electrical current from short circuiting by allowing electrons to move through the substance without having to flow through the air or any other highly resistive substance.

The wire’s lead-free pre-crimped terminals provide the connection between two electrical components with minimal resistance. The terminals are usually shaped or fitted in such a way that they provide additional stability and help avoid any accidental disconnections.

Pre-crimped leads are a type of jumper wire that are specifically designed for complex applications. These wires are often used to connect multiple electronic components on circuit boards, such as controls, drivers, and other components. These leads are usually terminated with small connectors, and they are available in various lengths and with different connectors to suit different applications. The crimped ends provide a secure connection that is less likely to come loose.

In conclusion, jumper wires and pre-crimped leads are versatile electrical components that are used in a wide variety of applications, from prototyping and troubleshooting to connecting circuit boards, testing probes, and connecting redundant power supplies. They provide a convenient and cost-effective way of connecting different electrical components and are available in a variety of thicknesses, lengths, and colors.