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A group of wires laying on a white piece of paper. Each is made with a different colour of wire, and has a resistor inline at the midpoint of the wire, with reinforcement on each side of the resistor and at each end where it joins a pin. They are for use with solderless breadboards while developing circuit designs.
A photograph of a solderless breadboard containing an electronics project, shot from above. There are various ICs and other components on the board, along with wire jumpers. Some of the jumpers are the ones with inline resistors shown in the previous picture.
I'm looking for #opinions from #electronics #hobbyists or professionals.
When I'm using a #solderless #breadboard to prototype circuits, resistors can be frustrating. If you just keep re-using the same well-worn ones that look like a pretzel, you have to leave […]
[Original post on mindly.social]
Photographic Notes on Wire Wrapping Photo 1: One of the most widely used custom assembly methods in the computer industry is wire wrapping. Special square wire wrap posts are built into sockets or mounted directly onto components. The stripped ends of insulated wires are con- nected to the posts using a special electric or hand operated tool. The result is an excellent connection with gas tight "vacuum welds" at each corner of the post as the sharp edge cuts slightly into the wire. Wire wrapping is a quick, easy and permanent way to connect point A to point B in your custom circuitry. Photo 2: The business end of an industrial quality wire wrap tool is the bit and sleeve assembly. The bit is driven by a high speed motor (or hand operated mechanism) and rotates around the post to be wrapped. The center of the bit has an alignment hole which fits over the wire wrap post to guide the operation. The bit also has a groove along its length into which the stripped end of a wire is inserted as shown. The wire is held in the groove by the sleeve and is pulled out during the process of wrapping. The sleeve itself does not rotate and is held rigidly in position. Photo 4: When the trigger has been pulled on a loaded wire wrap gun, the result (hopefully) will be a perfect wrap every time. The wrapping action begins at the bottom with a single turn of insulated wire followed by successive layers of stripped wire. In this picture you can count 15 layers of bare wire on the side facing the camera. The single turn of insulated wire is produced by what is called a modified wrap bit. This single turn around the post uses the insula- tion to help act as a strain relief to prevent breakage when handling wires while debugging a system. A standard wrap bit would start the first coil of bare wire minus the strain relief feature.
The forgotten art of wire wrapping, illustrated.
Byte Jan 1976
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