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Printed circuit board
Videos
A printed circuit board, also known as a printed wiring board, is a laminated sandwich structure of conductive and insulating layers, each with a pattern of traces, planes and other features etched fr
Printed circuit board of a DVD player
Printed circuit board of a DVD player
Part of a 1984 Sinclair ZX Spectrum computer board, a printed circuit board, showing the conductive traces, the through-hole paths to the other surfac
Part of a 1984 Sinclair ZX Spectrum computer board, a printed circuit board, showing the conductive traces, the through-hole paths to the other surface, vias connecting traces on both sides, and some electronic components mounted using through-hole mounting
Proximity fuze Mark 53 production line 1944
Proximity fuze Mark 53 production line 1944
Through-hole (leaded) resistors on a paper tape. When mounted to a PCB, the resistors are removed from the tape and their leads are trimmed to require
Through-hole (leaded) resistors on a paper tape. When mounted to a PCB, the resistors are removed from the tape and their leads are trimmed to required length.
Wire wrap
Videos
Wire wrap is an electronic component assembly technique that was invented to wire telephone crossbar switches, and later adapted to construct electronic circuit boards. Electronic components mounted o
Printed circuit board
…layers, to boards with more than a single side. Printed circuit boards are used in nearly all electronic products today. Alternatives to PCBs include wire wrap and point-to-point construction, both once popular but now rarely used. PCBs require additional design effort to lay out the circuit, but manufacturing…
Close-up of wire-wrap connections
Close-up of wire-wrap connections
Typical wire wrap construction of Bell System telephone crossbar switch. Some types of connection were soldered.
Typical wire wrap construction of Bell System telephone crossbar switch. Some types of connection were soldered.
Wire wrapped backplane of an IBM 1401 computer, introduced in 1959
Wire wrapped backplane of an IBM 1401 computer, introduced in 1959
A modern wire wrap in a CFL
A modern wire wrap in a CFL