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Memristor simulation with LTspice – a practical example!

Lately I’ve been getting back into the EE groove with some random electronics projects (such as an Arduino-based LED strip driver). I’ve also been dabbling with different circuit simulators like...

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Ah, Maker Faire! BeagleBone, HexBright, etc.

I had a great time at Maker Faire this weekend! I picked up a few items which I’ll quickly summarize here: First, I snagged a BeagleBone Black kit. I haven’t had a chance to open it up yet but it looks...

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On the proper use of the I2C bus in general and with the Logos RGB Matrix...

Note: In the course of all this I created an improved Arduino I2C bus scanner. Check it out! First, a thank-you to Pierce from Logos Electromechanical who clued me in on what I was doing wrong with the...

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Learning by Hacking: Modding the Logos RGB LED Matrix Backpack

As mentioned in a previous post, I recently bought an RGB LED Matrix “backpack” (with 8×8 RGB LED display) created by Logos Electromechanical. It’s an open design, and you can find both the hardware...

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Trying out my new Colorduino v2.0 – first impressions and tips

After my recent experiments with the Logos RGB backpack I stumbled upon the Colorduino (a cousin if not a descendant of the Rainbowduino), which is a very interesting little device! It not only...

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Of Memes and Memory and Moore’s Law

1000-fold more memory in the same device – but will it scale indefinitely? A post has been making the rounds on Reddit and Facebook, graphically demonstrating the 1000-fold increase in (flash) memory...

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A quick guide to running a Raspberry Pi from a hard drive

The Raspberry Pi is a fun if limited little single-board computer (were that it had more than one core). That said, running off an SD card is not exactly optimal, with write speeds being the greatest...

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MingHe buck/boost converters – handy, if you’re careful!

The following information seems to generalize to any of MingHe’s buck/boost converter designs with the 8x2pin daughter board with display and buttons). Though most of this info is for the more common...

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USB serial devices and the unexpected side-effects of serial enumeration...

I got a WDF_VIOLATION BSOD (0x0000010D) in Windows 7 (x64) when I connected a dev board via USB serial today. It was an alarming error I’ve never seen before… … but I suspect it’s more common for...

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Memristor simulation with LTspice – a practical example!

Update 2016-08-25: LTSpice XVII is out! It doesn’t look that different from IV but it’s definitely improved under the hood. There is a quirk though: it installs a set of component libraries in the...

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Clik here to view.

Ah, Maker Faire! BeagleBone, HexBright, etc.

I had a great time at Maker Faire this weekend! I picked up a few items which I’ll quickly summarize here: First, I snagged a BeagleBone Black kit. I haven’t had a chance to open it up yet but it looks...

View Article

On the proper use of the I2C bus in general and with the Logos RGB Matrix...

Note: In the course of all this I created an improved Arduino I2C bus scanner. Check it out! First, a thank-you to Pierce from Logos Electromechanical who clued me in on what I was doing wrong with the...

View Article

Image may be NSFW.
Clik here to view.

Learning by Hacking: Modding the Logos RGB LED Matrix Backpack

As mentioned in a previous post, I recently bought an RGB LED Matrix “backpack” (with 8×8 RGB LED display) created by Logos Electromechanical. It’s an open design, and you can find both the hardware...

View Article


Image may be NSFW.
Clik here to view.

Trying out my new Colorduino v2.0 – first impressions and tips

After my recent experiments with the Logos RGB backpack I stumbled upon the Colorduino (a cousin if not a descendant of the Rainbowduino), which is a very interesting little device! It not only...

View Article

Image may be NSFW.
Clik here to view.

Of Memes and Memory and Moore’s Law

1000-fold more memory in the same device – but will it scale indefinitely? A post has been making the rounds on Reddit and Facebook, graphically demonstrating the 1000-fold increase in (flash) memory...

View Article


A quick guide to running a Raspberry Pi from a hard drive

The Raspberry Pi is a fun if limited little single-board computer (were that it had more than one core). That said, running off an SD card is not exactly optimal, with write speeds being the greatest...

View Article

Image may be NSFW.
Clik here to view.

MingHe buck/boost converters – handy, if you’re careful!

The following information seems to generalize to any of MingHe’s buck/boost converter designs with the 8x2pin daughter board with display and buttons). Though most of this info is for the more common...

View Article


Image may be NSFW.
Clik here to view.

USB serial devices and the unexpected side-effects of serial enumeration...

I got a WDF_VIOLATION BSOD (0x0000010D) in Windows 7 (x64) when I connected a dev board via USB serial today. It was an alarming error I’ve never seen before… … but I suspect it’s more common for...

View Article

Image may be NSFW.
Clik here to view.

A spotter’s guide to WS2812B LEDs – distinguishing good from garbage!

In the course of my investigation of LEDs claiming to be WS2812Bs, I created a review on Amazon for Mokungit’s 93 LED ring device – because unlike other devices from other companies, theirs actually...

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Arduino Star OTTO (Light): Unboxing and first look!

[Updates at the end of this article] At today’s Bay Area Maker Faire I was hopeful that I’d hear some news on the Arduino Star OTTO… I walked away with not just news but a new Star OTTO Light! (At $54...

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