Category Archives: Anything

Unsorted stuff. Regular blog posts.

Laser Power supply

Posted on December 28, 2007 by Administrator

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 … Continue reading →

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DVD laser

Posted on December 18, 2007 by Administrator

There are lots of rumours in the internet about high power DVD lasers and about hacking them. I decided to test some of the rumours. Theoretically, there are two lasers in modern DVD recording device. Power of the laser must … Continue reading →

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My workbench

Posted on December 14, 2007 by Administrator

I would like to introduce part of my workbench. It is computer side of my workbench. There is electronics workbench, but it is not described here. I’ve made some order here before making pictures- regularly there is a big mess … Continue reading →

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Battery of capacitors

Posted on December 14, 2007 by Administrator

From computer tomograph PSU, I removed battery of capacitors. It is 12 high power electrolytic capacitors. 6 x 12000μF and 6 x 8200μF. All caps working ant 400V (450V surge). Total 121200μF (0,12F). We can charge them to about 400V … Continue reading →

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Computer tomograph

Posted on December 14, 2007 by Administrator

I achieved personal top record in braking electronics. Today (Nov 14th) I disassembled computer tomograph. As whole device was too big to fit in the van, I don’t have classic photos of the doughnut (donut). I have only partly disassembled … Continue reading →

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ATMEGA USB 13

Posted on December 14, 2007 by Administrator

Maybe I have some superstitious beliefs. So the are no Atmega USB 13 blog entry and no project #13.

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ATMEGA USB 12

Posted on December 7, 2007 by Administrator

Next toys connected to my AVR-USB testing board are two Freescale semiconductors (ex Motorola) accelerometer chips: MMA3202D and MMA7260QT. First is “catastrophic” accelerometer chip with high-G (100g X-axis and 50g Y-axis) sensor. If you apply such acceleration to human body … Continue reading →

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ATMEGA USB 11

Posted on November 24, 2007 by Administrator

There are lots of “rainbow LED” projects in the internet. So, I decided to place something similar in my weblog. There are 4 hardware PWM outputs in ATMEGA16. So do not need to build fancy software routines to make pulse … Continue reading →

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ATMEGA USB 009

Posted on November 20, 2007 by Administrator

Blog entry 008 is not working… so here is 009 I installed electronic lock with Dallas (Maxim) i-Button chips. It was very simple, low security version of electronic lock as it uses DS1990A chips as the keys. Original lock was … Continue reading →

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Dolby digital in cinema

Posted on November 17, 2007 by Administrator

Some time ago, I tore a piece of cinema film from local cinema theatre. The movie was some dark work, about vampires or something. Recently, in wikipedia I found article about Dolby digital encoding on the film tape. I found … Continue reading →

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