Few words about me:

From very childhood I loved computers, electronics, lasers, sulfuric acid and liquid nitrogen. I always wanted to be making microchips, UAVs and see nuclear explosion.

Now I am doing software engineering and in the spare time - some microelectronics and physics/chemistry experiments.

I live and work in Russia, Moscow.

A look inside Russian 28nm MIPS CPU - Baikal-T1

Many of you might have heard about Baikal-T1 - Russian implementation of dual core Imagination Technologies MIPS P5600 32 r5 with on-board 10Gb Ethernet. Baikal was the first to implement P5600 core in silicon.

CPUs itself (had to go through 4 pieces to get a good die):

Read more on zeptobars.ru →
February 28, 2017

Time for decent SDR: Ettus N210 - 40Mhz of RF bandwidth

Although it is surreal to see 50Mhz of spectrum in realtime (40Mhz bandwidth using UBX-40 - 10-6000MHz RF frontend) - it is only available on the host in 8-bit mode (it already requires 800Mbit/s - using otw_format=sc8 in device string). In 14-bit ADC mode we can "only" fit 25Mhz through gigabit Ethernet. But if you're ready to do custom processing on internal FPGA - one can do better.
February 14, 2017


January 21, 2017

Olympus 10x/0.3 WI - now with water immersion

In previous post about my microscope I've mentioned that now there are no more cheap upgrades left. This microscope lens is first among more expensive ones : Olympus 10x/0.3 WI - with water immersion, was lucky to get it for 800$ on ebay.
January 21, 2017

Flying over Minsk and Zurich


December 3, 2016

Winter is coming : 1212 hours timelapse (50 days)

Year ago I recorded 50 hour timelapse - now it's time for 50 day timelapse (1212 hours). Starting from green leaves to snow. Shooting on Xiaomi Yi, 1 frame per 30 seconds, and then - 16x faster in ffmpeg via frame averaging. Total video speed is 28'800х realtime. Original video was ~80 minutes, 28.7Gb (50Mbit/sec bitrate).

November 15, 2016

Lighting fluorescent lamp on a bench (with 400V/1A power supply)

For a very long time fluorescent lamps were a bit of a mystery for me - how they should be preheated, what's up with negative resistance, striking - all this was not clear. Today, when LED dominate the world (except for applications with UV harder than 365nm) I got to figure this out. Main ingredient here is new product of Chinese engineering - HSPY-400-01 - 400V/1A DCDC power supply.

November 13, 2016

59kV is no joke

HV experiments no longer require dodgy DIY supplies: Chinese manufacturers (CXDZ) started to make affordable HV power supplies (in this case - 60kV/10mA). These are mainly used and designed for electrostatic air filters which are obviously a big business in China. Output is floating - so one can tie ether + or - to ground (that is especially important for X-Ray tubes with water cooling, where anode is touching the water and should be at ground potential).

This is ~10kV ~2mA discharge:

Mandatory warning: Anything above 50V can kill you in "suitable" conditions. Achieving that at 1-60kV is much easier.
October 27, 2016

Birthday PCB

This birthday I've got a PCB on the table. Fiberglass... Must be delicious

October 23, 2016

Growing mint and dandelion

Some of you know that I like black tee, sometimes with mint. But buying good looking fresh mint is challenging. Obvious solution is to try to grow it myself. It also appeared to be not a trivial task as seeds are dust-like and quite hard to germinate. It was also hard to not forget to water it without auto-watering :-) Final result is pleasing:

Also I've planted dandelion (taraxacum) - but it might take a while more until it flowers. It was unexpected that literally no one sells seeds of dandelion in Russia - had to get it from Great Britain.

I've also shoot timelapse video of plants growth : first part is 40'000x realtime (2 weeks in 28 seconds, there is no wind there - it's natural plant movement during growth), second part is 6'000x realtime (during daylight movement is much faster as sun moves around):
October 18, 2016