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PCB Design: An Optoisolator Tutorial for Your PCB Layout

PCB Design: An Optocoupler Tutorial for Your PCB Layout Are you guilty of hitting the snooze button at least twice before you reluctantly wake up from your blissful sleep? My wife claims that I probably have the world record time for hitting the snooze button since I do it without even opening my eyes. But there are times when the third snooze alarm mysteriously doesn’t go off and it is a losing battle to get my day started on time. In electronics, embedded systems often rely on optocoupler circuits Read Article

PCB Design Tips: Should You Include an External Watchdog Timer (WDT) in Your Board Design

PCB Design Tips: Should You Include an External or Internal Watchdog Timer (WDT) in Your Board Design Would you invest in an external mouse, keyboard, and a high-definition monitor when your laptop comes equipped with these features? It’s a personal choice, especially when you want to turn your laptop into a portable workstation. My girlfriend, who’s starting her career as a professional accountant, dismissed my choice as a waste of money. In electronics, deciding whether to include an external watchdog timer (WDT) in your PCB design can be an Read Article

Microcontroller Failure Modes: Why They Happen and How to Prevent Them

Microcontroller Failure Modes: Why They Happen and How to Prevent Them I owe much of my design success to my college. Not because of the lab experiments where we learned what might accidentally blow up a capacitor, but because we learned that Murphy’s Law can strike when you least expect it to. Since I spent a lot of time playing Warcraft and struggling to finish up endless assignments, I relied on my computer to function at all times. Back then, computers were pretty limited and it wasn’t uncommon to see the Read Article

Solar Cars of the Future Pioneered by Midnight Sun Solar Design Team

Solar Cars of the Future Pioneered by Midnight Sun Solar Engineering and Design Team Since the 1988-1989 academic year the University of Waterloo’s Midnight Sun solar team, under the guidance of faculty advisor Professor Gordon Savage, has been building and competing in the American Solar Challenge ( ASC) and the World Solar Challenge ( WSC). Each of these competitions are held alternately every other year. Running the helm of the electrical systems team are Minghou Ji (Engineering Manager), Yifei Li (Hardware Engineer) and Read Article

How to Implement Supervised Inputs in Your PCB Circuit Design

How to Implement Supervised Inputs in Your PCB Circuit Design Have you ever worked late on a design project and forgot to eat? I was literally starving when I finished off one of my regular design projects. I decided to go for a quick meal at a local eatery. I placed my order and hoped the service would be fast. However, after 45 minutes and no food, I was told that the kitchen has missed my order. I learned my lesson that you can’t expect that your order is being followed just because you placed it. The Read Article

RF Interference Prevention and RF PCB Design in the Internet of Things

RF Interference Prevention and RF PCB Design in the Internet of Things Have you ever been to a party where there was so much noise you could barely hear yourself think? I’m a dedicated introvert, but sometimes my friends lure me out to such gatherings with promises that it will be “very relaxed.” They never are, and I don’t seem to learn. It’s times like those that I wish it was socially acceptable to wear noise-canceling headphones to such events. In the world of electronics, the burgeoning Internet of Things (IoT) Read Article

Bluetooth Low Energy and the Internet of Things

Bluetooth Low Energy and the Internet of Things Did you ever “reinvent yourself” at some time in your life? I did, I went from the nerd in high school who wore cargo shorts and high socks to a less nerdy college student who had regular socks and shorts with the fashionable number of pockets. By the end of college, I had learned “social skills” and was finally ready to enter society as the best, or at least acceptable, version of me. People aren’t the only things that need reinvention, so do Read Article

Why You Should Incorporate Digital Input Sampling for Embedded Systems

Why You Should Incorporate Digital Input Sampling in Your Embedded System I particularly enjoy shopping in the supermarket on the weekend. In the grocery section, there are samples of various food products that range from tuna spread to white coffee. While I enjoy hopping from one sample station to another, my 5 year old son shamelessly always asks for a second helping. Sampling in electronics carries a different meaning than leisurely eating a variety of snacks. In an embedded system, digital input signals play an Read Article

Facial Recognition and Its Applications in the Internet of Things and Wearables

Facial Recognition Applications in IoT Wearables One of the coolest tech things I saw in movies and couldn’t wait to see in the real world was retina scanning. I want to feel like James Bond or some other spy when I unlock my house or go into my office at work. I never thought biometrics could get any cooler than that, but Apple expanded my horizons the other day. The new iPhone X is equipped with state-of-the-art 3D IOT face recognition technology. Using a variety of sensors, they’re now able Read Article

PCB Design Tools at Maker Faire Open Source Hardware Summit

PCB Design Tools at Maker Faire Open Source Hardware Summit In response to a grassroots swell of “makers”, Maker Media launched the first Maker Faire in the San Francisco Bay Area in 2006. By 2014 over 215,000 attendees flocked to their two flagship events in New York city and San Francisco. Over the years, these large events spawned Featured Maker Faires, Mini-Maker Faires and School Maker Faires all around the world. If you’ve not heard of or been to a Maker Faire, I think their website describes it Read Article

PCB Solutions: Why a Single PCB Standalone Door Access Control System Is Not a Secure Design

PCB Solutions: Why a Single PCB Standalone Door Access Controllers System Is Not a Secure Design Editorial credit: Vasin Lee / Shutterstock.com While I don’t crave the latest iPhone X—the one where Apple removed the home button—it sure brought me down memory lane to my first mobile phone. I’ll always have a soft spot for that flip phone, but what I won’t miss is carrying my phone, a digital camera, and an MP3 player with me everywhere I went. Smartphones, which brought these key features—and more—into one device, seem like an inevitable Read Article

Machine to Machine Communication and Internet of Things Can Benefit from Wireless Connectors

Machine to Machine Communication and Internet of Things Can Benefit from Wireless Connectors Have you ever bought a new gizmo or gadget and wondered how you lived a life before it? For me, smartphones obviously come to mind. When I was a kid I was content to play with sticks and rocks. Now my kids play with virtual sticks and rocks on their iPhones. High-speed wireless M2M connectors will be like that for the Internet of Things. Keyssa has developed a new short-range chip that operates in the 60 GHz band that they say will replace all Read Article

PCB Technology: Considerations for Turning Your Embedded System into a Modbus Remote Terminal Unit

PCB Technology: Considerations for Turning Your Embedded System into a Modbus Remote Terminal Unit There is a misconception that engineers are terrible dates and hopeless in relationships. While I’m no relationship guru, past experiences have taught me that communication, or the lack off, is one of the main reasons relationships fail. Great communication isn’t talking endlessly to your partner, but rather being attentive to what they have to say, or decoding the hidden meaning of their cold silence. If you have mastered the elusive skill of Read Article

How To Design Internet Of Things Devices: Make Them Simple and Universal

How To Design Internet Of Things Devices: Make Them Simple and Universal Greed is a natural human tendency that promises much but often leaves us with nothing. My father grew up in a gold rich area of Africa. A miner once told my father and his friends that they could keep as much of his gold as they could carry by hand for 5 miles. My father and his friends each took their turns, but all of them tried to carry too much and couldn’t even make it one mile. The temptation to attempt too much, or keep too much to oneself Read Article

How to Optimize Your Design for Product Serviceability

How to Optimize Your Design for Product Serviceability Have you ever gone into a situation thinking that you’re totally prepared, only to come out of it feeling like you are totally clueless? Unfortunately, I have experienced this more times than I would like to recount. This was especially the case when I started designing products for serviceability or design for repair. There are many factors to consider before you decide whether your product should be designed for serviceability, and you should Read Article

How to Find the Best PCB Layout Help for Your Specific Design Questions

How to Find the Best PCB Layout Help for Your Specific Design Questions Have you ever heard stories about the gamblers in the Wild West pulling an ace out of their sleeve in order to cash in with the winning hand? Even though it’s not the most moral example I’ve ever used, the principle here is still a good one. Always make sure that you have something in your pocket that you can draw from when you need it. And this is just as important for us as designers as it is in everyday life. At some point, everyone needs help Read Article

3D Printing versus Real Time, Pre-Build Clearance Checking

3D Printing versus Real Time, Pre-Build Clearance Checking 3D printing has been revolutionizing the manufacturing industry. Once you have your completed design, just feed it into your printer and press a button, and it can be fabricated automatically. 3D printing is used for fast and easy prototyping of all sorts of complex and intricate items. So why not use it to fabricate your completed printed circuit board designs? Well, because when it comes to PCBs, there’s a better way. The Problem with 3D Read Article