Archive for the ‘Robotics’ Category

Neat bot

Wednesday, March 19th, 2008

1-Wire Adapter

Wednesday, June 20th, 2007

I ran across this schematic for a simple 1-wire serial adapter.

1wire-adapter.gif 1wire-adapter-9.png
25-pin 9-pin


I built one of these adapters and am using it to monitor 3 DS18S20 temperature sensors in my home using cacti.


555 Timer Calculator

Monday, June 18th, 2007

There are a lot of these out there but in true DIY spirit I wrote my own. You may need to download the .NET runtime libraries to run it.


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