Saturday, February 28, 2009

Esta es la killbot amigobot

Yo quiero R4P matanzabot amigobot y algoritmos! Cuatro patas buenas, dos patas malas!

Infravision: Illuminated

This video shows how to remove the IR Filter and shows the results of using an infrared LED to illuminate the image. The LED produces no light visible by the human allowing your killbot friendbot to see in the dark, or at least the dark for humans.

Also, why is infrared bluish?

Friday, February 27, 2009

Infravision: Testing

So the human says to the killbot, "My what nice infrared optical tracking and targeting system you have".
The killbot replies, "All the better to hunt with..."

First I open up the webcam (Creative Model #VF0220) and see what it looks like inside.

After the camera is opened I unscrew the lens and pry off the cap on the backside which reveals a small square infrared notch filter. Gently heating the lens module with a heat gun may make it easier to pry off the back cover. The CCD imaging module for webcams are naturally sensitivity to infrared and this filter blocks infrared to improve image quality. However since I want infrared night vision I remove this and reassemble.

Since I could not find any infrared LEDs, I tried using a heat gun as an infrared illuminator, which worked surprisingly well.

If you have more money you can try something like this or this...

Thursday, February 26, 2009

Random Design Ideas: Gripper

Random Design Ideas: Walker

Differential GPS

Differential GPS will provide a significant increase in accuracy over regular GPS, and with DGPS-IP you can get this huge performance increase for free, if you have a live internet connection.

Wednesday, February 25, 2009

Free Graph Paper

Free engineering graph paper PDFs available at including ones designed for Smith charts.

Pro/E Wildfire Tips and Tricks

If you have ever tried to build an assembly that uses parts from multiple directories you will have found that Pro/E does not seem to support this. The solution is to create a custom part library.

Custom part libraries can be implemented in Pro/E without using intralink by setting the search_path or search_path_file in your file. If you set the search_path_file you can set it to something like C:\Documents and Settings\username\My Documents\ and include all of the search directories in it.

To create the select tools > options from the main menu, then press the save button on the window that pops up and save it as C:\Documents and Settings\username\My Documents\

If you want to get complicated you can make your own custom part libraries using the Pro/Library features by setting pro_library_dir to something like C:\cad\lib

You can then create menu files which allow you to add a textual description to each part. This also prevent extraneous documentation directories from showing up.

Example servos.mnu file placed in the servos directory
HiTEC HS-65MG Mighty Feather
HiTEC HS-325HB Standard

Killbot que aprende caminar

Monday, February 23, 2009

Cyberbug UAV

Friday, February 20, 2009

Copper Etchant

ladyada has some information about using cupric chloride instead of ferric chloride as a PCB etchant. The biggest benefit of this is that the etchant is rechargable by stirring and it appears to be easier then ferric chloride to dispose of.

Thursday, February 19, 2009

Why is the pop rivet video so popular?

I posted a video about using pop rivets. Why is this video popular? What videos would people like?

Add your comments to this thread and we will see what happens.

Wednesday, February 18, 2009

Bad Ubuntu

If you boot Ubuntu with low disk space /tmp will be mounted as an overflow partition that is 1MB.

This means you need to reboot or remount /tmp after clearing off disk space.

Tuesday, February 17, 2009

3D Hokuyo Laser Scanner

The rotary stage is designed to rotate the scanner through the optical center.

Sunday, February 15, 2009

Electromagnet Testing

Milling Foam

How To: Break Chain