Most people agree that you are officially an nerd when you get an oscilloscope. Well... I just got a Rigol DS 1052E, 50 MHz, 2 Channel Digital Storage Oscilloscope. I'm really having fun learning to use it. The manual is very good and has some fun Chinese to English translations! For example the warranty card is addressed to the "Honorable Customer."
Gsample/s rate, which puts it in the same category as big-name competitors. It then surpasses them by providing a full 1-Msample memory — as much as 40 times more than competing units.
Here is an online review from the EEVblog (Electronics Engineering Video Blog) on YouTube:
It is a strange coincidence that theme of our Vacation Bible School this year has a robotic mascot! Each year, we combine forces with St. Joseph's Roman Catholic Church and Christ Episcopal Church in Bastrop to do Vacation Bible School. We always use Concordia Publishing's materials.
This year, the theme is GADGET'S Garage and features the robotic mascot named Gizmo! Several year's ago, before I got seriously interested in building robots, we did another V.B.S. that had a robotic mascot. I made a 4 foot tall "robot" out of Christmas light and junk. The kids liked it. I ended up giving it to the local library. As I was posting this, it occurred to me that I might have a picture - so here it is too! 
Here is one picture of the Monroe City School's Scribbler Robot Camp students playing with their robots. They were letting their robots follow each other around the line on the poster board. As you can see, the lead robot is lost and looking for the line. If I remember correctly, pictured from left to right are Brittny, Franz and Kaitlin. Those are the student's names - I don't remember what they named their Scribblers ;-). I hope that more pics will follow.
Many of you who follow my blog will remember my post on my Robot Lab. I've just made a really cool addition to my lab thanks to my wife. Her business had some old glass door metal storage shelves that they were getting rid of and she got them for me!
I am working with the folks in Instructional Technology at the Monroe City School District to conduct a Robot Camp at three High Schools this spring.
Happy New Year! On January 3, 2009, my buddy erco announced, "Success! I made several test runs with the finished encoders today, and it's quite rewarding to see the Scribbler actively correcting itself to drive a straight line. I posted a video... which shows the robot driving a small square and ending up pretty close to where it started. I have finished the encoder hardware installation to my satisfaction, but my software is very preliminary."
single-sided perfboard in a non-standard way as you can see in the photos. The board is a tight fit between two molded ribs in the top body shell. The encoder sensor is mounted in a raised position on the non-copper side so that it can stick through a mostly square hole in the case. All other components are mounted on the copper side so that he could flush-mount the non-copper side to the housing inside using a drop of hot melt glue. The Optical gap between encoder and wheel is ~0.150. erco aligned the sensors to read the outer rings of his encoder wheels, and mounted it horizontally from axle in the top body shell. Each encoder circuit has 3 wired connections: +5V, ground, and output. He disconnected photocells on the front of the Scribbler to use the encoders. Photocells are also mounted
in the top body shell on a small green PC board under a black plastic light shield. Nothing was removed, erco just unsoldered the green wire from P4 on the circuit board to disconnect all 3 photocells. The green wire becomes the ground connection for both encoders. He connected the left encoder output to pad P3 and the right encoder output to pad P1 on green photocell PC board. Stamp-wise, the left encoder is IN2 and the right encoder is IN0. The +5V connection is taken from the 6-hole "Hacker Port" header on main PC board.
