Savel brain dump in English!

I am using small Hobby drill (cheap dremmel tool) t make holes in PCB. Recently I broke several high speed steel drills. I decided to explore, why the drills are broken. After some investigation, I discovered that drill is moving a bit to side. The problem is in the drill grip. Sometimes, one element of the grip is “delayed” and the drill is not centered. When I use flexible steel drills, the drill is flexible enough to compensate the movements. But when I used high speed carbon steel for PCB, the brittle drill is damaged very fast.

I disassembled the drill. Here the image of the parts…

The drill is very simple: Chinese made electric motor, brass axle, one ball bearing and drill grip.

Just small note about the beauty of laser beam image. Laser beam is coherent light- the waves of the light are synchronized. So all theoretical effects of light can be viewed with naked eye. Here is the image of interference- some light is delayed and when the phase of the wave is opposite, the light disappears. Or it is just cool image.

And here is the detail of the image above. It is a pity, that digital camera can’t catch the “holographic” shine of the object.

It is unfocused red laser beam. I used DVD laser and some lenses. As lenses are not centered, the image is mushroom shaped. The current into laser is only ~75mA. Total distance the beam had traveled is about 6 meters. (18 feet)

This web log entry was written in Lithuanian language before new year. It was just a joke…

My nephew decided to build holographic super computer as his science project. (It a partly true). Here is small glance to the upcoming project- all information about this project is about 15 gigabytes in my hard disk. But later I decided to destroy all information about this project because I want to protect human race. Humans are too young for this technology…

Author of this idea is Henkas. In this photo, the authors is fine-tuning the holographic display.

We even disassembled old computer homograph to get some needed components.