Submitted by drew on

Where should you stop for a stop light or stop sign?

  1. One ore more car lengths away from the stop line
  2. At the stop line
  3. At the crosswalk
  4. At the curb
  5. Any of the above

Moliner's Answer:

E. Anywhere you like

A. Someone who stops here is usually an older woman. As if she stopped the car when the hood visually “touched” the stop line.

Conventional Answer

Trick question!

E.It could be any of the above, depending on the markings or situation.

  1. If someone is walking in the road, you should stop.
  2. Most intersections have full markings, so the stop line is the normal place.
  3. If there is no stop line, stop before the marked crosswalk.
  4. If there is no crosswalk, stop at the curb.

For a stop sign, you are supposed to stop at the first marked line. If you don’t have adequate vision due to an obstruction, you pull forward until you can see, and then stop again.

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Converting version control repositories from Bazaar to Git (bzr to git)

Submitted by drew on

Bazaar is great on Windows. Several years later, git's tools for Windows still.... (ahem) are lacking or too commercial. However, official development on it has ended and git is so much more popular now. So I think the time has come to convert all my beloved bzr repositories to git.

First we need note some prerequisites:

Adding a hardware clock to Raspberry Pi (DS3231)

Submitted by drew on

The popular clock module is uses the DS1307 real time clock chip, which is not very precise. For just a few dollars more, you can get a module with a much more precise DS3231 RTC chip. The one I got was SunFounder's module from Amazon for $9 (free shipping for Prime). It plugs right onto the Raspberry Pi's 40 pin header and doesn't even interfere with the plastic case I have. I have a Model B, but this module should also work on Model A and Model B+. The instructions refer to DS1307, but the chips use the same I2C commands, so it also works for DS3231.

How to run a PiPresents show when you don't have a Raspberry Pi

Submitted by drew on

PiPresents is some pretty cool software that will run a PowerPoint-like presentation. But with lots more flexibility. It was originally written for the Raspberry Pi.

However.... perhaps someone else has your Pi. Perhaps you don't even have one. It is possible to run a PiPresents show on  your good ol' desktop computer (Windows, Linux, or Mac). Here's how.