http://blog.savel.org Same chaos as in my room or DIY guide for you Sat, 15 Mar 2008 18:38:55 +0000 http://backend.userland.com/rss092 en 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 ... http://blog.savel.org/2008/03/15/small-drill/ 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 ... http://blog.savel.org/2008/03/15/the-beauty-of-laser-beam/ 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 ... http://blog.savel.org/2008/03/15/some-jokes/ I have already wrote about terminal computer I have. I didn't managed to start Windows CE on it. Maybe there were some problems in configuration or something. After some time I received more terminal computer and they booted Win CE without any problem. The only problem was in the hardware- ... http://blog.savel.org/2008/02/14/windows-ce/ From time to time I am doing house clear-up. If I didn't this, the house will be full of various electronic stuff. Some of the items maybe sold in eBay or local garage-sale, but some items must be thrown away. Some stuff appears in the house in very simple way- I ... http://blog.savel.org/2008/02/14/clearing-up-the-house/ As I mentioned, laser diodes are fragile devices. So the power supply must be adjusted before connecting any laser diode. After all components are placed on PCB and visual inspection is finished, connect one 1.2K resistor in R4, R5 and R6 place. Power up the circuit. Check if linear regulator is ... http://blog.savel.org/2008/01/31/laser-power-supply-2-adjustments/ I've made some improvements to my laser PSU. I added voltage regulator, max voltage on open laser suppressor, spike suppressor. Also some useless improvements… I didn't made new PCB, I tested modifications on old board. But all modifications I entered into Eagle software and traced PCB. I think this “theoretical" PCB is ... http://blog.savel.org/2008/01/25/laser-power-suply-2/ I improved my laser PSU design: added voltage regulator, additional schottky diodes, some capacitors and it seams that laser supply is quite stable. I tested it with low power led lasers and several high power IR lasers from CDRW devices. Heat sink on the PCB is not mandatory. Only in ... http://blog.savel.org/2008/01/11/ir-vs-red/ My red laser stock was empty. Mainly due to my errors and experiments. As I didn't find spare DVD recorders, I switched to infrared lasers (IR). It is much easier to find powerful IR laser- the source is any CDROM recorder. In newer high speed CDRW devices, lasers are quite ... http://blog.savel.org/2008/01/10/ir-laser/ This is first version of laser diode power supply. I borrowed circuit from die4laser.com and changed it a bit. It is classic current source using n-channel power device. It is better to use p-channel devices here, but now I have only n-channel mosfets on my workbench. They are cheap and ... http://blog.savel.org/2007/12/28/laser-power-supply/