Submitted by drew on
traffic-06q.png

Traffic Question 6:

The blue dots indicate the path used to pull IN the driveway.

Is it possible to back out of a driveway and head in the direction indicated by the pink arrow, using only one lane of the road?

A. No, one lane is not enough room.

B. Yes, it can be done in one lane.

traffic-06a.png

Moliner’s Answer :

A. No

The laws of physics and geometry are different when you are in reverse. It is impossible for the wheels to follow the same tracks that they made when pulling into the driveway.

Conventional Answer:

D. Yes

If you replay turning into the driveway in reverse (turn the steering wheel in the same places by the same amount, but in the opposite direction), the wheels will follow the same path.

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Traffic

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.