DVD Player PCB: Structure, Function and Repair Guide A DVD player is one of the last mass-market products built around a mechanical system that must be controlled to microscopic precision, and the board that does the controlling is a useful case study in mixed-signal design. A DVD player PCB reads…

PCB Trace Fusing Current: When the Copper Lets Go Modern electronics depend on boards that are assembled correctly the first time. Every product – a phone, a charger, a medical instrument or an industrial controller – relies on thousands of solder joints that must conduct current for years. This article…

PCB Immersion Silver Storage: A Finish That Tarnishes Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB immersion silver storage from the perspective of a PCBA factory floor,…

DVR PCB: Structure, Function and Key Components A digital video recorder is a device that must accept several camera streams at once, compress them, store them continuously and serve them back to a viewer who may be anywhere on the network. The DVR PCB is where all of that happens,…

MCPCB Thickness: How Board Thickness Affects Thermal Performance MCPCB thickness determines two things at once: how well the board removes heat from a component, and whether the assembly survives the mechanical and thermal stress of manufacturing and use. The two requirements often pull in opposite directions. A metal core printed…

PCB ENIG Black Pad Failure: When the Joint Looks Right and Is Not Modern electronics depend on boards that are assembled correctly the first time. Every product – a phone, a charger, a medical instrument or an industrial controller – relies on thousands of solder joints that must conduct current…

PCB Nitrogen Reflow Benefits: Ovens With Less Oxygen Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB nitrogen reflow benefits from the perspective of a PCBA factory floor,…

OSP PCB: Organic Solderability Preservative Explained An organic solderability preservative is the least visible of the common finishes. It adds no measurable thickness, leaves no metal on the pad and costs less than any of the alternatives, yet it is the standard choice for a large share of fine pitch…

LED Strip PCB: Voltage Drop, Segments and Thermal Design An LED strip is a long, narrow circuit board with LEDs mounted at regular intervals along its length. The design looks simple, and that is the trap. Over a length of several metres the copper resistance accumulates, the voltage at the…

Air Conditioner PCB: Isolation, Relays and Inverter Drive An air conditioner contains at least two boards that talk to each other, and between them they switch mains voltage, run a variable-speed compressor and read a handful of sensors. The result is a control design with an unusual combination of constraints:…