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Multilayer PCB Design: Manufacturing Boards for High Voltage PCBs Multilayer PCB Design: Manufacturing Boards for High Voltage PCBs One of my favorite movies is the original Shrek. It was thrown into the nerd vernacular of my friends and siblings, along with more traditional sources of quotes, like Star Wars. One scene particularly stands out, when Shrek explains to Donkey that ogres, like himself, are complex creatures. “Onions have layers. Ogres have layers. Onions have layers. You get it? We both have layers.” Donkey points out that not everyone likes onions, but everyone Read Article
BOM Management Tools and Real Time Part Access: How It Will Help Your PCB Design for Manufacturability PCB BOM Management Tools and Real Time Part Access: How It Will Help Your Design for Manufacturability Have you ever been so ready to take off on a new project that you can’t wait to jump into it? Of course you have. As engineers that’s part of what makes us tick. We’ve got so many ideas running around in our head that we would rather forego sleep or food in order to create a design. Then it happens, some kind of delay forces us to lock up the brakes on our creative process. There are many scenarios that can do this, but one of the worst is when Read Article
PCB Design and BOM Management: How to Ensure Profitability in Low Volume Manufacturing Circuit Board Design and BOM Management in Low Volume PCB Assembly What’s the difference between Angry Birds and SpongeBob? I’m probably at an age where I shouldn’t be caring about these things, but choosing the wrong character for my son’s 5th birthday cake could spell disaster. As a designer, you probably can’t relate to my need to carefully consider the repercussions of choosing SpongeBob. However, you might understand it better knowing that I apply the same level of caution when designing for low volume Read Article
PCB Layout Constraints That Help Manage Component Obsolescence PCB Layout Constraints That Help Manage Component Obsolescence Just about everyone in the world of engineering has heard some variation of the “Iron Triangle” theory. It’s a popular way to talk about what is or isn’t possible among those given the task of getting things done. Basically, it is a philosophy that says you can get something done fast, cheap, or good; pick two. For example, when designing a PCB for an aircraft, cheap goes out the window, fast takes a back seat and quality is paramount Read Article
The Benefits of Having an Automated Bill of Materials in Project Management BOM Automation: The Benefits of Having an Automated Bill of Materials in Project Management I have some friends who founded a startup company to create and market a brilliant new product. Their product quickly became a success, but all their hard work was constantly undermined by communication issues between departments. It wasn’t long until the engineers found their creative hands tied, purchasing was buried under an avalanche of unreliable documentation, and the product build-in manufacturing was slowed to a crawl from incorrect and Read Article
Flywheel and Flyback Diodes Prevent Electrical Noise in Circuits Using Flyback Diodes in Relays Prevents Electrical Noise in Your Circuits What is a flyback diode, and how does a flyback diode protect a circuit? When used properly, flyback diodes can reduce electrical noise and prevent flyback voltages from building up. Read Article
How a Bill of Materials Can Improve Your Supply Chain Management The Benefits of a Bill of Materials In Supply Chain Management Some of the most complicated engineering projects I’ve worked on were made up of multiple layers of sub-assemblies. Before we could order parts for a new assembly, we needed to go through every component in each tier of the final product to ensure that they would meet the rigorous current, voltage, and temperature derating requirements for different customer applications. The first few times I had to do this, it was by merging dozens of excel Read Article
BOM Part Number Management: Why It Should Be Automated BOM Part Number Management: Why It Should Be Automated If you’ve ever worked with high voltages or have designed a high voltage circuit, you know that they always require careful planning. In my last job, we had been using a particular high voltage power supply circuit for years. When it was initially designed, the board took longer than usual to complete. While its design required some extra finicking, it was worth the effort. Everything was going well until the larger assembly's design was modified Read Article
What Materials to Include in Your Bill of Materials What Materials to Include in Your Bill of Materials As an electrical engineer, I am constantly impressed with the brilliant designs my colleagues come up with. I’m also constantly shocked to see how mismanaged most of their BOMs are. I’ve been on projects with a huge range of practices for handling a bill of materials. On one end of the spectrum, there was my senior design project, with no BOM at all, just a series of sticky notes my group placed on the front cover flap of our notebooks. Protip Read Article
Why Designing a High Voltage PCB for Rapid Prototyping Is More Effective Than Rushing to Form Factor Why Designing a High Voltage PCB for Rapid Prototyping Is More Effective Than Rushing to Form Factor Remember that fable we all were told as kids about the tortoise and the hare? The moral of the story was that slow and steady wins the race. In engineering, this is especially true when it comes to creating a consumer product quickly. However, this practice is rarely the approach we take. I personally experienced this when I rushed the design of a dimmer for the IOT market. In fact, I was making two dimmers. The first dimmer was simpler and used Read Article
High Speed Design Techniques: Schematic Considerations High Speed Design Techniques: Schematic Considerations With my apologies to Richard Rodgers and Oscar Hammerstein for borrowing their lyrics, “Let’s start at the very beginning, a very good place to start…” In this case, however, we are going to be looking at high frequency and high speed PCB design techniques instead of a Hollywood musical, and the beginning happens to be the schematic. You may argue that the place to start would be on the ground plane itself. Board materials, layer stackup planning Read Article
PCB Design Guidelines for Designing Solar Powered Embedded Systems PCB Design Guidelines for Designing Solar Powered Embedded Systems Have you ever gone on a vacation and felt like you needed another one immediately after? I sure do, my last beach holiday was completely ruined by constant thunderstorms. Unpredictable weather always is always a dilemma when I’m planning ahead for my next vacation, especially if it involves outdoor activities. I take the same cautious approach when I’m designing solar-powered embedded systems intended for outdoor applications. It is a totally Read Article
High Voltage PCB Design for Arc Prevention: How to Manage Pads and Traces High Voltage PCB Design for Arc Prevention: How to Manage Pads and Traces Growing up, I’d work obsessively on jigsaw puzzles with my grandmother. Like, skipping dinner obsessively. She was a grandmaster of puzzles; you only got to look at the picture once when you took the pieces out. If you needed more than your memory and pattern recognition, that was cheating. Instead of facing the shame of looking at the box, I learned to focus on the shapes of the pieces, and how each fit with its neighbors. That way, not knowing Read Article
3D PCB Design: Why You Need It and How It Will Help You 3D PCB Design: Why You Need It and How It Will Help You The other day I watched as a young father was entertaining his one-year old son on his shoulders. Securely held by his dad, the boy would constantly move from side trying to get different views of his father. In an overload of cuteness, he would first look at his dad over the left side of his face, then play with his hair, move over to the right side, then go back to where he started from. I thoroughly enjoyed watching this precious moment, but Read Article
Why You Should Use PCB Assembly Variants for Multiple Design Configurations Why You Should Use PCB Assembly Variants for Multiple Design Configurations Years ago I was working on a design that had been copied from an existing board, but there was a problem. A few of the circuits on my layout didn’t match what the engineer had in his schematic. This generated a lot of confusion. We eventually tracked the problem down to some edits that had been made to the board after the design had been approved and sent to fabrication. An inadvertent change to the board while creating an assembly variation had Read Article
A Comparison of Active Cooling Techniques for Electronic Equipment A Comparison of Active Cooling Techniques for Electronic Equipment Cooling of electronic equipment is pretty important. I know this because part of my laptop’s motherboard melted once. I bought a new top-of-the-line computer back in 2010 to try out a new graphics-intensive video game. It came with an amazing graphics card, but an undersized thermal management system to hang. I should have known there was a problem when the keyboard got too hot to touch when I started playing games. Soon afterward, my computer Read Article
How to Plan Your PCB Layout for a High Voltage Design How to Plan Your PCB Layout for a High Voltage Design I used to trail run with a friend who is an urban planner. As part of her devious plan to get me to run further before I was too tired and bored, she’d tell me about the various considerations that go into the zoning and construction in a town. There were also a lot of shenanigans with local politics that provided a juicy distraction. Although my friend would disagree, a high voltage PCB layout have some similarities to complex urban planning. In Read Article