PCB Encapsulation Voids: Air Left Inside Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. Understanding PCB encapsulation voids gives you a practical advantage when you choose a…

Backplane PCB Design: Passive, Active and High-Speed A backplane does almost nothing on its own, and that is the point. It carries no processing, no firmware and usually no user-facing function. Its job is to let a set of plug-in modules share power and talk to one another through a…

High Voltage Creepage and Clearance on PCB Design Spacing on a high voltage board is not a matter of taste. It is set by the distance the designer leaves between conductors, by the environment the product will live in, and by the standard the product must satisfy. Two distances matter,…

Safety Critical PCB: Safety Critical System PCB: Standards, Materials and Testing A safety critical system is one where a failure can cause injury, and the boards inside such systems are designed so that a failure either does not occur or occurs in a way that is detectable and safe. That…

Heavy Copper PCB Design and Etching Tolerance Explained Heavy copper boards look simple to design because the traces are wide and the geometry is coarse. In practice they behave like a different process. The etch that shapes a one ounce layer cannot shape a four ounce layer in the same…

Castellated Holes and Module Edge Design for PCB Modules A module that solders onto a carrier board like a component has no pins and no connector. Its interface is a row of castellated holes along the edge, each one a plated half cylinder that wets to a pad on the…

PCB Heat Sink Attachment: Getting the Heat Out 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 explains…

AI PCB Assembly in Robotics, IoT and Smart Devices Assembly has always been a data-rich process, and for most of its history that data was used after the fact, in yield reports and failure analyses. That is changing. AI PCB assembly shifts the same information into the process itself, using…

PCB Gap Pad Selection: Filling the Space 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 explains PCB…

Practical Notes on ESP32-C3 Vs ESP32-S3 Two of the most popular Espressif parts look similar on a pinout diagram and behave very differently once they reach the layout stage. The ESP32-C3 vs ESP32-S3 question comes up constantly in design reviews, and the usual answer about core count and price misses…