Levitating Globe Teardown, Part 2
Tim Wescott opens up a budget levitating globe and shows why it seems magical: a massive 30 mm rare-earth magnet and a deliberately cheap magnetic circuit. He documents a bolt used as the flux core, a likely microcontroller and hall sensor in the head, very fine winding in the electromagnet, and a single-transistor unidirectional drive. Part 3 will measure forces and sensor voltages to build a better controller.
Levitating Globe Teardown, Part 1
Tim Wescott buys a $30 floating-globe desk toy and walks through first impressions, hands-on magnet experiments, and a frank critique of its control system. He highlights the toy's underdamped response, uni-polar electromagnet tradeoffs, and simple hacks that reveal clues about the pole pieces and magnet layout. This is a practical, engineer-forward preview before the actual teardown in part two.
Massive Open Online Courses ( Transforming education )
Jayaraman Kiruthi Vasan outlines why MOOCs have become a practical way for embedded engineers and programmers to learn from top universities without quitting jobs. The post highlights platform options like Coursera, edX, Udacity and Khan Academy, explains how on-demand video lectures and clear prerequisites make targeted upskilling feasible, and points to DSP and Python courses useful for embedded design.
It starts with an LED
A single blinking LED on an IO pin launched Richard Dorfner's 30-year embedded career. In this personal post he traces that early spark from an Atari hobbyist article to a professional life of hands-on debugging, tooling, and mentoring. He also commits to sharing practical tips, hardware tricks, and lessons on balancing technical design with business decisions through his ongoing journal.
A part of history
At KVHS's 40th anniversary Gene Breniman reflects on how a tiny 100-milliwatt AM experiment grew into a high-power FM station and a launchpad for engineers. He credits teacher Ernie Wilson's hands-on mentorship for turning students into builders, and laments the loss of his high school's electronics program amid budget cuts. The post is a personal reminder why practical tech education and resourceful projects still matter.
Configuration Management: Why Developers are Avert to
A few reasons why developers have aversion towards "Software Configuration Management Systems"
(1) They do not understand the importance of configuration management. - It is a common and logical reason. But, it is also a very dangerous sign for any organization. If their developers do not understand the importance of configuration management; then it is highly likely that developers even do not understand the other fundamentals of software development. The situation becomes worst...
Nokia in Soup Again?
After suffering a big blow its image due to faulty "BL-5C Batteries", Nokia seems to have landed in another trouble. Company's decision to shutdown its manufacturing plant in Germany, has sparked strong public ire towards Nokia in the country. The strong political and government support to the Anti-Nokia movement, might mean a further Erosion of Company's Image and loss of revenue in Germany (and some other...Next time you refer to an Optical Disc
I recently came across this interesting (and lesser known) fact about Optical Discs:
The word disc, in reference to DVD or CD, should be spelled with a c, not a k. The generally accepted rule is that optical discs are spelled with a c, whereas magnetic disks are spelled with a k. For magneto-optical discs, which are a combination of both formats, the word is spelled with c because the discs are read with a laser. The New York Times, after years of head-in-the-sand usage of k for...
Demoing Your Software
I came across this interesting blog entry on "Product Demo". Apart from touching upon some public speaking and presentation skills, it contains facts and data which you might find plenty useful.A part of history
At KVHS's 40th anniversary Gene Breniman reflects on how a tiny 100-milliwatt AM experiment grew into a high-power FM station and a launchpad for engineers. He credits teacher Ernie Wilson's hands-on mentorship for turning students into builders, and laments the loss of his high school's electronics program amid budget cuts. The post is a personal reminder why practical tech education and resourceful projects still matter.
Garden Rakes Revisited: The Hall of Shame
Jason Sachs opens a Hall of Shame to catalog the everyday software "garden rakes" that steal time and focus. He walks through concrete examples from PowerPoint point editing and Office window behavior to Outlook undo bugs and TurboTax's opaque errors, showing how poor UI and hidden behaviors force you to work around the tool instead of with it. This is a short, cranky checklist for avoiding wasted effort.
On optimizing manual soldering
When faced with manual soldering of thousands of components, speed and efficiency become pivotal. Here are some takeaways from my own experience attempting to optimize such a process.
Next time you refer to an Optical Disc
I recently came across this interesting (and lesser known) fact about Optical Discs:
The word disc, in reference to DVD or CD, should be spelled with a c, not a k. The generally accepted rule is that optical discs are spelled with a c, whereas magnetic disks are spelled with a k. For magneto-optical discs, which are a combination of both formats, the word is spelled with c because the discs are read with a laser. The New York Times, after years of head-in-the-sand usage of k for...
Configuration Management: Why Developers are Avert to
A few reasons why developers have aversion towards "Software Configuration Management Systems"
(1) They do not understand the importance of configuration management. - It is a common and logical reason. But, it is also a very dangerous sign for any organization. If their developers do not understand the importance of configuration management; then it is highly likely that developers even do not understand the other fundamentals of software development. The situation becomes worst...
It starts with an LED
A single blinking LED on an IO pin launched Richard Dorfner's 30-year embedded career. In this personal post he traces that early spark from an Atari hobbyist article to a professional life of hands-on debugging, tooling, and mentoring. He also commits to sharing practical tips, hardware tricks, and lessons on balancing technical design with business decisions through his ongoing journal.
Nokia in Soup Again?
After suffering a big blow its image due to faulty "BL-5C Batteries", Nokia seems to have landed in another trouble. Company's decision to shutdown its manufacturing plant in Germany, has sparked strong public ire towards Nokia in the country. The strong political and government support to the Anti-Nokia movement, might mean a further Erosion of Company's Image and loss of revenue in Germany (and some other...Oh Robot My Robot
Oh Robot! My Robot! You’ve broken off your nose! Your head is spinning round and round, your eye no longer glows, Each program after program tapped your golden memory, You used to have 12K, now there is none that I can see, Under smoldering antennae, Over long forgotten feet, My sister used your last part: The chip she tried to eat.
Oh Robot, My Robot, the remote controls—they call, The call—for...
Demoing Your Software
I came across this interesting blog entry on "Product Demo". Apart from touching upon some public speaking and presentation skills, it contains facts and data which you might find plenty useful.It starts with an LED
A single blinking LED on an IO pin launched Richard Dorfner's 30-year embedded career. In this personal post he traces that early spark from an Atari hobbyist article to a professional life of hands-on debugging, tooling, and mentoring. He also commits to sharing practical tips, hardware tricks, and lessons on balancing technical design with business decisions through his ongoing journal.
Stuck with Jira — and Stuckons
Jason Sachs vents about Jira’s quirks and why it still feels stuck despite years of fixes. He walks through concrete pain points: nonstandard markup, relentless notification noise, poor meta-task support, and limited analytics that make day-to-day engineering work harder. To explain why schedules blow up, he introduces a simple kepton model of planons, workons, and stuckons that highlights unexpected work.
On optimizing manual soldering
When faced with manual soldering of thousands of components, speed and efficiency become pivotal. Here are some takeaways from my own experience attempting to optimize such a process.
Configuration Management: Why Developers are Avert to
A few reasons why developers have aversion towards "Software Configuration Management Systems"
(1) They do not understand the importance of configuration management. - It is a common and logical reason. But, it is also a very dangerous sign for any organization. If their developers do not understand the importance of configuration management; then it is highly likely that developers even do not understand the other fundamentals of software development. The situation becomes worst...
Next time you refer to an Optical Disc
I recently came across this interesting (and lesser known) fact about Optical Discs:
The word disc, in reference to DVD or CD, should be spelled with a c, not a k. The generally accepted rule is that optical discs are spelled with a c, whereas magnetic disks are spelled with a k. For magneto-optical discs, which are a combination of both formats, the word is spelled with c because the discs are read with a laser. The New York Times, after years of head-in-the-sand usage of k for...
Nokia in Soup Again?
After suffering a big blow its image due to faulty "BL-5C Batteries", Nokia seems to have landed in another trouble. Company's decision to shutdown its manufacturing plant in Germany, has sparked strong public ire towards Nokia in the country. The strong political and government support to the Anti-Nokia movement, might mean a further Erosion of Company's Image and loss of revenue in Germany (and some other...Demoing Your Software
I came across this interesting blog entry on "Product Demo". Apart from touching upon some public speaking and presentation skills, it contains facts and data which you might find plenty useful.Baking in Process Improvements
Jason Sachs uses a backyard cookie-baking session with his niece to illustrate practical process improvements engineers can apply. He documents batch-by-batch tweaks — temperature, dough placement, and a pipelined scooping step — that raised throughput and improved quality, then connects the lesson to pilot projects and small automations like a Python script for JIRA. The piece makes the case for quick experiments and a culture that rewards refinement.
Project Log: Pixelblaze Christmas Lights
Festive fun and the hacker spirit combine in my janky attempt to adorn my house with addressable LEDs! In this post, I show you how I used a Pixelblaze and a cheap strip of WS2811 RGB LEDs (and not a little bit of hot glue and paper clips) to make a super cool set of Christmas lights.
