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Lenovo Thinkpad T61 GPU fix. Or not.
My mobile workhorse is a trusty Lenovo T61, a close cousin of the ones they use on the International Space Station. How cool is that? It’s built like a tank, and weighs about as much, but the feature I...
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Systemd for Embedded Linux
Over the last few years, there has been a lot of controversy in the Linux world about systemd. As I understand it, systemd is intended to be a better-engineered, more powerful version of the motley...
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Reliable I2C with a Raspberry Pi and Arduino
There are many ways of connecting sensors and devices to a Raspberry Pi. One of the most popular is the I2C bus. It’s great for devices which don’t need to transfer too much data, like simple sensors...
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Cracking a password-protected PDF file
Suppose you asked an insurance company for a letter. The insurance company kindly sent it as a PDF attached to an email. Sensibly, they protected that PDF with a password which they told you over the...
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