A fast way to turn lots of images into an Adobe Acrobat PDF file

Dave Farquhar Software , , , , , , , , ,

I have a collection of magazine scans that, inconveniently, came as a series of JPG images rather than as PDFs that are more conducive to reading. I wanted PDFs, so I found a way to turn lots of images into an Adobe Acrobat PDF file.

Building the PDF manually took a good 30 minutes per issue, so I wanted a faster way. Using command-line tools, I was able to convert the entire collection (about 40 issues) in less than 30 minutes. Read more

An Amazon shopping trick

Dave Farquhar Saving money ,

I alluded to this the other day, but some people might find it worth mentioning in its own right. As most people know, Amazon offers free shipping on orders over $25. And if you’re buying something small, shipping can end up being a large chunk of the total bill.

So when buying something sold directly by Amazon or fulfilled by Amazon, you can save the shipping by building a shopping list, if you can put off the purchase a little while.

Read more

Workable two-factor authentication

Dave Farquhar security , , , , , , ,

I’m several months late to this party, but I just saw Marcel’s post on Google’s two-factor authentication with a smartphone.

He’s right. It works until someone steals your phone. Once someone steals your phone, you’re in a world of hurt. It’s just a compromise, until we find a way to do two-factor authentication the right way.

The right way is with a smartcard, issued by some sort of central authority. Read more

Using a Lionel (or other brand) O or O27 transformer with HO or N scale trains

Dave Farquhar model railroading , , , , , , , ,

Here’s a good question: Can you use Lionel O or O27 transformers (or, for that matter, American Flyer S transformers) with HO or N scale trains?

The answer is, not directly. It will make a terrible noise if you hook it up. But you can make it work properly if you add a bridge rectifier. Look for one that’s 10 amps or more; don’t expect to have to pay more than a couple of dollars for one. Read more

If you have wooden trains, you need Suretrack

Dave Farquhar Toy trains , , , , , ,
If you have wooden trains, you need Suretrack

I finally bought my boys a box of Suretrack, after thinking about it for a mere two years. Wait. Make that a long two years. A long two years of the most destructive forces known to humanity (two young boys) ravaging their wooden track.

Here’s the drill: I spend 45 minutes building an intricate layout to their ever-changing specifications, and of course since they think there’s no such thing as too many bridges, that layout comes tumbling down about 45 seconds after the first train hits the track.

Sound familiar? Read more