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How to Select an Inductor for a Buck Converter

An SMPS is one of those quiet (yet electrically noisy) devices that makes your favorite electronics run smoothly. Among the numerous DC-DC converter topologies, a buck converter finds plenty of uses for stepping down the input voltage to a lower level while providing high efficiency power conversion. A common question around component selection for these power converters is how to select an inductor for a buck converter. The goal in working with an inductor and other components in a buck converter is to limit power loss to heat and while minimizing current ripple.

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US Department of Transportation Seeking Alternatives to GPS

GPS-capable devices range from your phone to your smartwatch; simply type in your destination and follow the directions. Simple, right? According to the Washington Post, we should all stop using GPS as it’s ruining the navigation centers of our brains. Despite the neurological effects on perception and judgment, the U.S. Department of Transportation (DOT) aims to find alternatives to GPS to provide redundancy.

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Bluetooth 5.1 SoC vs. Module: Which is Best for Your Design?

The list of features available in Bluetooth just got a little longer since the release of Bluetooth 5.1. If you want to incorporate a Bluetooth 5.1 SoC into your new product, you have two primary options for bringing this component into your board. The first is as an SoC that mounts to your board just like any other component. The other option is to bring a module into your new board—directly onto the surface layer. Here’s what you need to know about a Bluetooth 5.1 SoC or module in your next IoT product.

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USB Power Delivery for Your Next Project

Since its introduction in the late 90s, the USB standard has never ceased to grow in popularity. There has been a growing trend toward USB being a power delivery interface with data, rather than a data interface that can supply power, as the 1.0 specification originally intended. To supply the increasing thirst for power over USB, the USB 3.0 Spec with Type-C began implementing the Power Delivery standard, which you should consider using for your next electronics project.

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Circuit Board Design for In-Circuit Testing

There are many types of circuit board tests available in electronics manufacturing today, each having unique goals and characteristics. This article presents guidelines at the design level (schematic and layout) to enable the use of in-circuit testing (ICT) fixtures to verify proper component assembly. These simple test fixtures allow your board to be tested as its assembled, which helps identify and remove failed boards from your production run.

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Creating PCB Mounting Holes

Our PCB must somehow be assembled into the final drone assembly. This will be achieved by attaching our PCB to the motherboard connector and by special mounting racks, which requires precise positioning of the two mounting holes on the PCB.

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Planning for the Future with Cirris Systems and Altium

Technological advancements have been a hallmark of the past few decades, from the widespread adoption of internet technology to the smartphones and wireless devices we rely on every day to stay connected. Orlan Thatcher, Board Layout Specialist at Cirris Systems, could never have predicted the demand their services would generate. The company struggled with six different software platforms before switching to Altium Designer.

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Working with PCB Keepouts

When working in the PCB, there may be specific areas that you would want to prevent the presence of certain objects, such as vias, tracks or copper regions. All of this can be realized in Altium Designer by using the Keepouts feature.

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An Introduction to NFC

I used to work in a research lab that worked primarily with RFID (Radio Frequency IDentification) and NFC (Near Field Communication) technology, particularly for the agriculture industry and cattle identification. These were very specialized fields; however, the lab also worked on projects which involved retail and various other applications for NFC. It’s an amazing technology that you might be using every day without thinking about it - building access to your mobile phone payments, for instance. 

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Editing Your PCB Geometry with MCAD Tools

You need to define your PCB geometry in the context of your enclosure. If your board cannot physically be assembled into the final product, it doesn't matter how well laid out it is electrically. This webinar focuses on how the MCAD CoDesigner allows you to edit your PCB in the context of a higher-level assembly, allowing you to respect the relevant mechanical constraints.

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The PCB Fabrication Process — what Every Design Engineer Needs To Know, Part 2

In Part 1 of this article, I described the first steps that occur during the PCB fabrication process. They detailed the inner layer processing effort as well as the efforts that take place during the transition from inner layer processing to lamination. This part of the article will provide a detailed description of the lamination, drilling and plating processes.

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The PCB Fabrication Process—What Every Design Engineer Needs To Know, Part 1

There are still a number of designers - perhaps most of them - who have never toured a PCB fabrication facility. They are also unaware of the various steps that occur during the fabrication process. The purpose of this article is to describe those steps and what transpires in each of them. Part 1 of this article focuses on inner layer processing and the steps that are done prior the lamination process.

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Webinar "8 Reasons to Store Your Components in Altium 365"

Working with local libraries seems like a simple solution, but we often don’t take into account the added time spent maintaining libraries and sharing them between team members. This webinar showcases the advantages of component storage in Аltium 365 to resolve the issues of local libraries and component management.

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Bridging the Gap Between Designers and Customers

Every piece of electronic equipment starts with a great idea. Transforming great ideas into real, physical products takes a team of talented individuals and multiple companies coming together to make everything from the internal components to the external hardware. Paul Payen de la Garanderie, Founder and Owner of AW Audio, an engineering services company based in France, understands these challenges very well. With an extensive background in the Audio/Visual industry, Paul has had to work with multiple companies over the years, from small start-ups to celebrated AV firms.

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Additive PCB Manufacturing: The Vaccine for Electronics Supply Shocks?

At this time, at least a quarter of the world’s population is under quarantine, with workers unable to go to offices or factories, leading to fundamental disabling of the world economy. The electronics industry is suffering greatly as well, dealing with a supply shock from factories shutting down in Southeast Asia, to demand-side shocks from Western markets literally shutting down. Now it is the electrical engineers taking the lead with additive PCB manufacturing.

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Webinar "6 Steps to Master Project Storage"

Altium 365 provides a secure cloud platform to store all of your design files in a single place so you can share them with anyone and access them from anywhere. This webinar discusses the advantages of placing, storing, and working with projects in Altium 365.

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Altium Designer 20 Changed My Layout Design Routines

I just finalized my first PCB design using Altium Designer 20. At the same time, I tested some new AD20 features, and in this article, I’ll share my thoughts about new layout design features which made the biggest impression for me: sliding, and any-angle routing.

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Designing for Antenna Isolation in Your Wireless System

Anyone who has taken apart an old cell phone or designs IoT devices knows multiple communication capabilities are present in these designs, each requiring different antennas. The RF designer should already take precautions for interconnect isolation, but antenna isolation is just as important when modeling and designing wireless systems.

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PCB Trace and Pad Clearance: Low vs. High Voltage

High voltage/high current designs carry safety requirements which need to be met by designers. Similarly, high speed designs need to have suppressed crosstalk in order to ensure signal integrity. The key design aspects that relate to both areas are your PCB trace clearance and pad clearance values. These design choices are critical for balancing safety, noise suppression, and manufacturability.

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Product Lifecycle Management in Electronics Manufacturing
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Product Lifecycle Management in Electronics Manufacturing

An effective product lifecycle management (PLM) solution will integrate the tools and processes employed to design, develop and manufacture a new device. This solution goes beyond engineering activities to include the project management, process control, and financial management of the end-to-end business processes. PLM solutions create this collaborative environment where product development can flourish, bringing additional benefits in efficiencies and transparent communications, breaking silos, and speeding up the development process.

Tight versus loose coupling
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Should You Use Tight vs. Loose Differential Pair Spacing and Coupling?

In this article, we want to get closer to a realistic description of tight coupling vs. loose coupling in terms of differential pair spacing, as well as how the differential pair spacing affects things like impedance, differential-mode noise, reception of common-mode noise, and termination. As we’ll see, the focus on tight coupling has its merits, but it’s often cited as necessary for the wrong reasons.

Engineering Design Review Guide
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How to Solve Your Engineering Design Review Challenges

You’ve possibly gone through plenty of engineering design reviews, both on the front-end of a project and the back-end before manufacturing. Engineering design reviews are performed to accomplish multiple objectives, and with many engineering teams taking a systems-based approach to design and production, electronics design teams will need to review much more than just a PCB layout and BOM. Today’s challenges with sourcing, manufacturability, reliability, and mechanical constraints are all areas that must be confronted in real designs

Schematic Review Checklist
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Schematic Review Checklist

One of the most common points of failure of a device occurs even before you start to layout your circuit board. Mistakes in your schematic design can easily make their way all the way into prototypes or production without a second thought once layout starts. In this article, I’m not going to extol the virtues of a good schematic design. Instead, this article is a simple no frills checklist.

Via current carrying capacity for PCBs
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PCB Via Current-Carrying Capacity: How Hot is Too Hot?

One common question from designers is current-carrying capacity of conductors in a PCB. Trace and via current-carrying capacity are legitimate design points to focus on when designing a new board that will carry high current. The goal is to keep conductor temperatures below some appropriate limit, which then helps keep components on the board cool. Let’s dig into the current state of thermal demands on vias in PCBs and how they compare to internal and external PCB traces.

PCB Shield
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Phalanx, not Failure: PCB Shielding to Protect Your Design

A combination of good printed circuit board design and good shielding mitigates EMI. Good PCB design for EMI shielding revolves around the layout, the placement of filters, and ground planes. A well-designed PCB minimizes parasitic capacitance and ground loops. Keep reading to learn more about PCB shielding.

Man working in Altium Designer
Blog
Best Practices in Hardware Version Control Systems

Any project can get very complex, and the PCB design team needs to track revisions throughout a project. Why worry about tracking revisions? In the event you ever receive changes to product functional requirements, major changes are made to your product’s architecture, or you’re ready to finalize the design and prepare for fabrication, it’s best to clone a project at its current state and begin working on a new version. Keeping track of all these design changes in a PCB design project takes the type of hardware version control tools you’ll find in Altium 365™.

Copper pour and via stitching
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Copper Pour and Via Stitching: Do You Need Them in a PCB Layout?

To pour or not to pour, to stitch or not to stitch… Over many years, some common “rules of thumb” have become very popular and, ultimately, taken a bit out of context. Rules of thumb are not always wrong, but taking PCB design recommendations out of context helps justify bad design practices, and it can even affect the producibility of your board. Like many aspects of a physical PCB layout, via stitching and copper pour can be like acid: quite useful if implemented properly, but also dangerous if used indiscriminately.

MOSFET Components
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Should You Use Power MOSFETs in Series?

Power MOSFETs enable a huge range of electronic systems, specifically in situations where BJTs are not useful or efficient. MOSFETs can be used in high current systems in parallel arrangements, but what about their use in series? Both arrangements of MOSFETs have their pitfalls that designers should consider. Let’s look at MOSFETs in series as they are quite useful in certain systems, but be careful to design your circuits and your PCB for reliability.

MLCC controlled ESR capacitor
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Controlled ESR Capacitors: Should You Use Them for Power Integrity?

I can’t think of a single product I’ve built that doesn’t require capacitors. We often talk a lot about effective series inductance (ESL) in capacitors and its effects on power integrity. What about effective series resistance (ESR)? Is there a technique you can use to determine the appropriate level of resistance, and can you use ESR to your advantage?

Ground Pour, Impedance and Losses
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Microstrip Ground Clearance Part 2: How Clearance Affects Losses

If your goal is to hit a target impedance, and you’re worried about how nearby pour might affect impedance, you can get closer than the limits set by the 3W rule. But what are the effects on losses? If the reason for this question isn’t obvious, or if you’re not up-to-date on the finer points of transmission line design, then keep reading to see how nearby ground pour can affect losses in impedance-controlled interconnects.

Choosing the Right Microphone for Embedded Applications
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Choosing the Right Microphone for Embedded Applications

If you need to capture sound waves for your electrical device to process, you'll need a microphone. However, microphones these days have become very advanced, and there are so many options to choose from. They range from the relatively simple and popular condenser type microphones to state-of-the-art sound conversion solutions incorporating internal amplifiers and other electronic processing functionality. In this article, we'll take a look at some of the options available.

 Computer planet with circuit grid
Blog
Composite Amplifiers and How They Give the Best of Both Worlds

There are many times where you need an amplifier with high gain, low noise, high slew rate, and broad bandwidth simultaneously. However, not all of these design goals are possible with all off-the-shelf components. Here are some points to consider when working with a composite amplifier design and how to evaluate your design with the right set of circuit simulation tools.

Impedance balancing power supply
Blog
Reduce Common-Mode Noise in Your Power Supply with Impedance Balancing

Simple switching regulator circuits that operate in compact spaces, like on a small PCB, can usually be deployed in noisy environments without superimposing significant noise on the output power level. As long as you lay out the board properly, you’ll probably only need a simple filter circuit to remove EMI on the inputs and outputs. As the regulator becomes larger, both physically and electrically, noise problems can become much more apparent, namely radiated EMI and conducted EMI in the PCB layout.

Part 1: Why Your PCB Design Review Process Is Obsolete and What You Can Do About It
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Part 1: Why Your PCB Design Review Process Is Obsolete and What You Can Do About It

A PCB design review is a practice to review the design of a board for possible errors and issues at various stages of product development. It can range from a formal checklist with official sign-offs to a more free-form inspection of schematic drawings and PCB layouts. For this article, we will not delve into what to check during a design review process but rather look at how a review process itself usually unfolds and how to optimize it to get the most out of your time.

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NEW
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New in Altium's Software
Customize Your ODB++ Output for Each Partner

You can now precisely control what design data is included in your ODB++ outputs for different manufacturing recipients. Choose which signal layers to export, decide how the netlist is handled (included, disabled, or neutralized), and control whether component data is removed or shared without properties.

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Altium Stories
Proper Voltage Built a Universal Battery Platform with Altium

Watch our latest customer success story to see how Proper Voltage partnered with Altium to accelerate high-power battery development for next-generation robotics. With our software, they streamlined collaboration, sped up design reviews, improved sourcing visibility, and reduced risk.

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New in Altium's Software
Improve Readability with Custom Pin Spacing

You can now control the vertical spacing of a pin’s designator and name with a custom margin. This setting can be applied globally via Schematic Preferences or adjusted individually in the Pin properties.

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How-To's
Does Decoupling Capacitor Placement Actually Matter?

Our new video tackles common questions about capacitor placement on a PCB. Expert Zach Peterson explains why placement is often less critical on multilayer boards with well-designed power and ground planes and shares the key insights most application notes leave out.

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Altium Stories
Teaching Power to Think - How Proper Voltage Accelerates Innovation with Altium

Watch the video where you can find how Proper Voltage centralized communication, synchronized ECAD–MCAD development, and gained early insight into supply chain risks using Altium’s connected design platform.

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New in Altium's Software
Detect Z-Axis Clearance Issues Earlier

The Z-axis clearance rule enables accurate verification of minimum interlayer copper spacing. It supports targeted constraints between net classes, differential pairs, and schematic parameter directives for advanced rule definition.

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How-To's
Fix Inconsistent Part Parameters in Your PCB Schematic

Watch our latest video to learn what parameterization really means, why getting the manufacturer name and part number right is essential, and how to quickly identify inconsistencies across your schematic components using Altium’s Parameter Manager tool.

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New in Altium's Software
Create IPC-Aligned Footprints with Less Effort

The default value for the Solder Mask Expansion rule has been updated to improve consistency across design environments. In both PCB documents and rule-driven solder mask expansion within PCB library documents, the default setting is now 0 mil, replacing the previous default of 4 mil.

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How-To's
Via Dispersion: Why Propagation Delay Changes with Frequency

Explore the concept of via dispersion and how it impacts propagation delay across frequencies. This tutorial walks through the math behind extracting delay from insertion loss and return loss S-parameters and explains why results can vary depending on your operating range.

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New in Altium's Software
Make Via Rule Configuration More Intuitive

Set precise control over your routing via styles with new rule settings in the Physical View. Define minimum, maximum, and preferred values for both diameter and hole size, and easily switch between constraint ranges or template-based definitions for faster, more flexible design.

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How-To's
Coplanar Ground Done Right: PCB Design Best Practices

When is coplanar ground actually useful and when does it provide no benefit at all? If you’ve ever wondered about this, check out our brand-new video where we tackle one of the most common questions in PCB design.

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New in Altium's Software
Import and Export with Modern Mechanical Models

We have expanded mechanical integration by adding support for SOLIDWORKS 2024 and SOLIDWORKS 2025 part models when importing 3D bodies into the design environment. This enhancement allows designers to work with the latest mechanical models created in SOLIDWORKS without the need for additional conversions or workarounds.

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How-To's
How to Input Via Delay in Altium for DDR Routing

In this video, we tackle a real viewer question about DDR3 routing across multiple PCB layers and show how via delay can silently eat into your skew margin before you’ve even finished routing, using Altium’s default 10-layer stackup as a reference.

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New in Altium's Software
Clearly Show Jumper Wires in Your Harness Designs

Support has been improved so that jumper wires connecting two cavities within the same connector are now properly shown in Layout Drawings, making the connector wiring easier to understand during documentation and review.

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How-To's
Why Datasheet PCB Guidelines Are Often Wrong

Watch our brand-new video where we tackle the persistent issue of outdated PCB design guidelines still found in datasheets and application notes from major semiconductor manufacturers. Drawing on viewer comments, real-world datasheet examples, and insights from industry experts, we examine why recommendations such as splitting analog and digital ground planes (an approach rooted in the 1980s) continue to circulate despite their potential to cause EMC failures, signal integrity problems, and costly redesigns.

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New in Altium's Software
Keep Your Harness Designs in Sync with Library Updates

The "Update From Libraries" feature has been enhanced to provide broader support for harness-related objects across both Wiring Diagrams and Layout Drawings. With this expansion, a wider range of harness components such as connectors, wires, splices, and associated attributes can now be synchronized directly with their corresponding library definitions.

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