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Category Archives: Anything
RGB matrix: organization
This post is about structure and organization of big RGB LED matrix. Just notes to remember how it works, as paper notes tends to be lost. And it is much easier to find information back in the internet compared to … Continue reading
Gyroscopic effects in high speed hard drives
Just short demonstration of gyroscopic effects in high speed hard disks. I had some useless hard disks. It is old SCSI server disk ST39102LW. It is only 9Gb, but 10000 rpm (10K). This increase effect to noticible level. To feel … Continue reading
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Satellite transceiver
Yes, it was satellite transceiver. For receiving and sending information to satellite. Sometime I post messages about items I dissasemble. This was quite a big device: It is not compressor, it is satellite transceiver from Hughes Network System. Such device … Continue reading
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Surface tension effects in SMD soldering
I had very short time to remove some Atmel (AT90SL2343T) chips from discarder NOKIA communication equipment boards using standard hot air gun. It was very high quality PCB boards so I made some experiments about self positioning of some SMD … Continue reading
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Games of Short Waves
From young years I was interested in showwave (HAM) radio, but due to economical and political situation I never started (you know, the axis of evil- soviet union and etc.) Later I managed to listen some of the HAM radio … Continue reading
Answer to the riddle
It is RGB LED matrix board! It is some PCB from Adaptive Micro Systems LLC, USA. This comapny specializes in LED advert production. From simple single color static board to full RGB color outdoor monitor. Mine LED board is 72 … Continue reading
Riddle
This is starting post about very interesting project. Try to guess what it is? This PCB is populated with serious stuff. Big square chip is Altera Cyclone EP1C6T144C8, 30 pcs of MBI5026CD, 8 pcs of HT04 (standard chips), 24 Fairchild … Continue reading
Mother China or USD rate fluctuation
When this post was posted, it was 2008 May. The exchange rate for USD was quite low compared to our local currency. Today (2015) we do not have local currency- we joined eurozone. And exchange rate for USD is quite … Continue reading
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Collimator
For my laser experiment I am using collimators from old laser printers and copie machines. Especially from copiers. A collimator is a device that narrows a beam of particles or waves. To “narrow” can mean either to cause the directions … Continue reading
2D laser scanner- mechanics
This real 2D scanner mechanics for laser beam. Not face ones with small DC motors, but real mirror system to form real image on some screen or fog. All you need some real good laser source (I’ve used burnig red … Continue reading