Category Archives: Designs

e14 Project: Raspberry Pi 2 Laser Dog Watcher

My dog Penny is one of the best. She has the two critical commands of ‘come’ and ‘stay’ down pat so well that I can go for a run with her off-leash here in Denver. She’s gentile with our newborn … Continue reading

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Using a Raspberry Pi 2 and ownCloud v8 to Control My Cloud Data

A couple years ago, I showed how to setup an ownCloud server on a Raspberry Pi.  The system worked, but there were some performance hiccups. Most importantly was the ability for the system to handle large files and for the … Continue reading

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Rocky Mountain SMTA Brings its A-Game to the 2015 Expo at Mile High Stadium

Last week the Rocky Mountain chapter of the Surface Mount Technology Association (SMTA) held their 2015 expo at the United Club of Mile High Stadium (home of the Denver Broncos). The event, which was free to the public, brought together … Continue reading

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e14: Laser Doorbell in the Cloud!

Sometimes the notion of the Internet of Things (IoT) strikes me as silly; why would anyone want to connect their dishwasher to the internet? But still, I wanted to develop a hobby project that would explore some of the tech. … Continue reading

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How to Characterize a Switch-Mode Power Supply Design with a Tek MDO3000 Scope

Most of the designs that I work on require some sort of power supply design. The power supply rails are the foundation of a good design, allowing one to hit not only the desired voltage level, but also low noise, … Continue reading

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e14 Project: A Silent Wireless Laser Tripwire Doorbell

I’ve had a problem since moving into my new place that I can’t hear people knock at my front door. Sure I could get a doorbell at the hardware store, but those things stink. Instead, I thought I’d create a … Continue reading

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Using Paper Protos to Check EAGLE Footprints

Checking footprints in a PCB layout review with only the on-screen file can be a pain in the neck.  There are many different measurements that need to be made for each individual part, and the mouse-based measurement tool can be … Continue reading

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Arduino Clones Can Be Better Than Shields

  Arduino is certainly the most popular method of getting info electronics, or at least embedded electronics.  My BlueStamp Engineering students seem to gravitate to them when selecting their projects.  But what about after the first few projects have been created … Continue reading

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Finally, an Arduino library for EAGLE!

Have you put together an Arduino-based circuit and looking to nicely (but easily) document it?  Or perhaps you’re looking to create an Arduino Shield with EAGLE and want to start with the correct dimensions of the headers.  Element14 has come … Continue reading

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Frame-It: A Tool For Wading Through Millions of Parts

Hardware engineers everywhere know how crrazy selecting parts can be. Especially when a part change needs to occur months after intiial part selection. Why was this part so special? What were the nuances of it again?  Frame-it is a chrome … Continue reading

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