Archive for May, 2007

Postscript for Encoder Wheels

Thursday, May 17th, 2007

From ranchbots

%! Postscript utility for printing an encoder wheel
/inch {72 mul} def % #points/inch (don't change me)
/size 0.5 inch def % radius of encoder wheel
/segments 16 def % number of segments (black and white)
/angle 360 segments div def
{ /radius exch def
/angle_s exch def
/angle_e exch def
newpath 0 0 moveto
0 0 radius angle_s angle_e arc
} def

1.0 inch 1.0 inch translate
0 1 segments {
360 segments div rotate
angle 0 size wedge
2 mod 0 eq {1} {0} ifelse
setgray fill
} for


Linux Quiz #007

Thursday, May 10th, 2007

Shell Word Count (Submit Answer)

Create a bash shell script that when given a filename as the first argument will print out the number of words in the filename. The filename can be any text file and a word is defined as a sequence of one or more printable characters, not including whitespace characters.

New Project: usbServo

Wednesday, May 9th, 2007

Flush with the success of my scantool project I have started the usbServo project. There are already plenty of projects out there like this, as well as commercial units, but what is the fun in that? 🙂

Cheap RF Link

Thursday, May 3rd, 2007

Here is an article about using some cheap RF modules from Sparkfun to create a wireless link.