In the early stage of development, circuit components used to be connected using wires. Later, wood was used a substrate with copper foils. Technology slowly paced towards the use of printed circuit boards (PCB). As the name goes, PCBs are just the insulated substrate board used for only printing the circuit leaving space for the components to be placed. Initially, the components used to come leaded, which required holes to be made on the PCB during designing. This is through hole technology. Later, with the advancement of technology on the…
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