Advanced Programming and Design by McCombs Kevin;

Author:McCombs, Kevin; [McCombs, Kevin]
Language: eng
Format: epub
Publisher: Cavendish Square Publishing LLC

Blade connectors or quick connects can be a good insulated solution for connections between wires. Many circuit breakers and fuses also have this kind of terminal.

For higher amperage applications, you can use bullet connectors, which are popular among RC vehicle enthusiasts. These can be effective for making motors easily detachable while retaining a connection with high current draw.

Heat Shrink, Twisting, and Shielding

Heat shrink is a material that does exactly what its name suggests: shrinks when heat is applied. This stuff is absolutely necessary to clean wiring as it can cover up soldered joints or exposed parts of connectors. Heat shrink is kind of like wire insulation you can put on after the fact, making it incredibly valuable for repairs and modifications as well. Heat shrink does necessitate a bit of forethought and process, however. Make sure to slide the heat shrink over a wire before crimping a large connection. That way you can still shrink the material down small enough to hold the wires.

Solder sleeves are a wonderful invention as they take the technical work out of soldering.

They contain a ring of solder inside a sleeve of heat shrink that contracts when heated and binds to wire insulation. The solder has a lower melting temperature than the wires you are connecting. Slide the solder sleeve over a wire and then twist together the exposed wires you want to connect. (Solder sleeves may come with a terminal attached; you slide the wire inside the terminal before applying heat.) Then, center the sleeve over the exposed wires. Using only a high temperature heat gun, you simply focus heat on the solder joint ring inside the heat shrink until the flux that comes on the solder ring gets hot enough to flow through the wires. Flux is a material that cleans the heated surfaces, preventing corrosion and enhancing the soldering bond. These can be very handy, especially when working with small wires or creating a junction of multiple wires.

Without the solder sleeve, you must apply your own flux, heat it so it flows through the wires, heat solder so it covers the wires, then use a tube of heat shrink pulled over the joint to seal it.

A student uses a heat gun to connect two wires in a solder sleeve (above). A ring of solder is inside the sleeve (below).

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