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Adafruit_BBIO bugs

First bug was mine.  I was doing "import Adafruit_BBIO as GPIO" instead of "import Adafruit_BBIO.GPIO as GPIO".  That gave this error once I started trying to use it:$ ./test.pyTraceback (most recent...

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Which GPIO pins work with Adafruit_BBIO

Working with the Beaglebone can be really frustrating.  There are a lot of buggy libraries and incomplete docs, and the Sitara chip is really complicated, overloading its pins to do lots of different...

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SeeedStudio Xadow with Ubuntu

Seems like every time I try to use the Xadow board, I have to spend hours getting it to program via the Arduino IDE.  This time, the solution seems to have been putting this in a file called...

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Connecting BeagleBone to newer Android Nexus phones (like Nexus 5X and Nexus...

Update: Huh, I just discovered that this exists: Settings > developer options > networking > select USB configuration > RNDIS (USB ethernet).  But it doesn't seem to work.  So I suspect the...

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BeagleBone to Android via USB Serial

As I mentioned in my last post, BeagleBone uses the Linux g_multi kernel module so that when you plug it into a PC, it appears to be a USB hub with USB-serial, USB-ethernet and USB storage devices...

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Supernight 5050 RGB LED string teardown

I've been having fun with this RGB LED string from Amazon with 300 5050 LEDs in a 16.4ft string.One bug: after using it for a few minutes, it seems to have swapped the red and green columns of colored...

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Measuring spirit level accuracy

I have a cheap Stanley 24-inch level like this one:The other day I noticed it didn't seem to be very accurate.  I checked by flipping it end for end on my workpiece, and sure enough the bubble settled...

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NVidia Jetson TX1 raw bayer frames via v4l2 via /dev/video0

The NVidia Jetson TX1 dev kit comes with a 5MP camera and a bewildering array of different libraries for accessing it.  One of the routes is using v4l2 through the /dev/video0 device.  This route only...

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Brass hammer from hex bar stock

My friend likes to make wooden mallets: So I thought he might get a kick out of making one with a brass head.  Here's the head so far.  (he's still thinking about what to do for a handle). This much...

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Compile NVidia Jetson TX1 kernel on device

There are lots of threads about problems compiling new kernels for their Jetson TX1 boards.  A lot of the issues seem to be related to the cross compilation environment.The TX1 is pretty beefy, so I...

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California Air Tools sucks

I bought this California Air Tools CAT-4620AC air compressor over a more respected brand like Makita because it's supposed to be so quiet. They claim it's only 70dB, about the level of a spoken...

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Home made cold stone ice cream

I was daydreaming about 3D ice printers, and it occurred to me that I might be able to make Cold Stone style ice cream if I put a big chunk of metal in the freezer.My first thought was to use steel,...

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Teardown: Miller RFCS RJ45 tig welding foot pedal

[Gallery with hi-res versions of the photos shown here]Tig welding pedals are expensive, mostly over $100.  Miller wants $150 for the RFCS-RJ45 pedal that goes with the Multimatic 215, and $600 for...

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Longs Motor DM542A idle current bug

Stepper motor drivers like this one usually have a jumper (that's usually SW4) that sets idle current.  So if you haven't sent any pulses in a while, rather than cooking your stepper by holding full...

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