альпийская горка

http://en.wikipedia.org/wiki/Helianthemum_nummularium

http://en.wikipedia.org/wiki/Campanula_carpatica

http://en.wikipedia.org/wiki/Portulaca_grandiflora

http://en.wikipedia.org/wiki/Saxifraga

http://seemnemaailm.ee/public/2/saxifraga_arendsii.jpg

http://www.vertumn.ru/img/katalog/w150.jpg

http://en.wikipedia.org/wiki/Papaver_alpinum

http://luirig.altervista.org/cpm/albums/capasso1/001-papaver-alpinum.jpg

http://en.wikipedia.org/wiki/Papaver_nudicaule

http://gstuff.co.nz/shop/garden/images/papavericeland_lge.jpg

My orchids:

1. Phalaenopsis amabilis.

2. Oncidium varicosum (x Oncidium Aloha Iwanaga = Sweet Sugar or Dancing Lady).

3. Dendrobium nobile, . hybride Dendrobium Isle x Super Star.

4 Dendrobium Kingianum.

5 Phalaenopsis amabilis, mini, hybride Cool Breeze

Altium Designer and pads with drill holes on photomask.

Some people use to make PCB at home by method of Laser-Iron-Textolite or the photoresist method. They route an PCB and then print it on paper in b/w. Then PCB is tinned and drilled. It is very easy to drill an PCB if copper pads which are to be drilled already have a hall in the middle. In this way drill is so to say auto-aimed by the borders of solder on copper pad and does not slide out.

But it is not so easy to get photomask with hall in pads by means of AD. But it is possible.

True way: create two gerber files with bottom and top layers, and drill file. These actions are accessed in PCB mode through File-Fabrication options-[Gerber files, NC Drill Files] . So, we have 3 files. Then, switch to "top" gerber. Go to File-Import-Quick load. Then in the dialog select the path "project_name_Files" and there will be one .txt file "project_name.txt", choose it. Then go to View-Workspace Panels-CamStatic-CamStatic. In CamStatic dialog switch off top layer and drill. Go to Edit-Composite layers-Build Composite. You must set name of new layer lest AD crashes. First layer in list will be the top layer, and the second will be the drill. In Polarity column you select Dark for wire layer and Clear for drill, and go further. That's all.

For LIT you mirror resulting layer if it is top when for photoresist method you mirror the bottom. Mirroring is accessed via Tools->Film wizard.

PS. If you see the haircrosses on drill holes, go to View and select Cam Editor instead of NC Editor.

Acer unlocked virtualization in AO751 netbook.

Recently I have bought an Acer AO-751H. All were OK excepting that KVM (kernel virtual machine) said that intel-VT was locked by the BIOS. I was already about shitting bricks when I saw that Acer had released a new BIOS version, 3210. I flashed it, and discovered KVM warning to had been swept away from logs. Now my AO751 runs two operatig systems simultaneously: win-xp and debian (gnu) linux.

I use win-xp for some reasons: to run CADs for electronics and microcontrollers design. My wife and me also use stolen MS-word, because in our country many people suffer from MS installed directly in brain. Surely, we should never buy MS-Word to see some formulae from our scientific staff. We use TeX, of course.

Now I plan to set up an Ubuntu Karmic, because of it has an easy support of GMA-500 intel video card.

12->27V dc-dc convertor for my microdrill with 27V DPM-25 motor

It is based on cheap TL494, driver IR4426, and two FETs IRFZ44. 88KHz pulses push-pull primary coil of transformer with 2000HM (N-87) ring core. No warming elements thanks to FET driver.

With respect to TL494 datasheet, this circuit won't work with 8V input, but it works with 5V :) Of course, It can not convert 5 to 27V, since it was designed for operating from 9..12V.

USBASP and 8051 / at89s8252 / at89s8253 MCUs

Recently I have made two USBASP (http://www.fischl.de/usbasp/) AVR programmer boards. At home I use AVR MCUs, and all were ok. ATmega-8 with external 16.384MHz oscillator is programmed in 4 seconds. At my workplace I deal with AT89s8252 (military analog), and in my lab it used to flash them by means of 3-resistors on an LPT port. Such a so-called «programmer» flashes the chip in some minutes and kicks.

But I found that avrdude does not support such MCUs. Neither 8051 nor at89s8252. The only I have found was the config for 89s8253, this chip has SPI-commands similar to AVR ones.

I was sad, but suddenly I found s51dude (http://s51dude.gforge.lug.fi.uba.ar/) project, that works with USBISP programmer (usbtiny), which has a different schematics. Project's homepage provides patched (for s51 ISP support) sources for USBISP, so I've made little changes and flashed my USBASP with patched USPISP firmware. Now I have USBASP board which is detected as USPISP and supports both AVR and s51 chips.

Patched firmware with sources for USBASP board you can get here.