Sands

2011 (2 weeks), private project, 1 developer
result: 1 sample is implemented
tools: Oscilloscope & solder iron

It is developed for protection of country side building that is 7-15 kW load of non-stable 220V power network. It disconnects load (building with power stabilizer) if its current exceeds the customizable level (25-70 amperes) and then it runs timer. Timer delay may be set in the range of 2 to 24 minutes. Device restores power to load when timer’s delay is passed.
It is designed to work at wide range of power: 90 to 330 volts (tested). In normal condition (220V) this device consumes only 2,5 Watts and 6 Watts when load is disconnected.
Such device becomes useful when power stabilizer does not have automatic restoring of power after overcurrent condition. This leads to total discharging of backup batteries of UPS which follows stabilizer even if power is already restored.
At the country side overcurrent condition often occurs when power network voltage drops. For example, if voltage drops to about 147 volts then input current of stabilizer rises in 1.5 times (while building consumes the same power after stabilizer).

Electronics, Power Units, Sensors/Detectors

2011/06 (3 weeks), customer: “Gradsoft”, outsourcing, 1 developer
result: written & tested on 2 Tomcats
dev. OS: Windows XP; languages: Java SE 6, PHP; tools: Eclipse, Git, Tomcat, EhCache

PHP session save handler and back-end Java part for caching at multi-node back-end with EhCache. PHP session’s data is transferred over HTML or JsonRPC.

@ Software, WEB/Network Java

2011/05, customer: “Gradsoft”, outsourcing, 1 developer
result: charts are built
dev. OS: Windows XP; languages: Java SE 6; tools: Eclipse, Redmine, MS Excel

Building Excel charts on calls statistic to see maximum lines load and its duration during every day. The aim was to minimize number of external phone lines (analyzing daily peak load).

@ Software, Algorithms and Data Processing, Phone/Sound Java

2011 (1.5 month), private project, 1 developer
result: Tetris works, framework is not finished
dev. OS: Windows XP; target OS: Android; languages: Java, XML; tools: Eclipse, Android API 1.6, Android SDK

Tetris like games framework.
Download it in middle state RoTris.apk. Points are not counted. Speed is fixed. Size depends only on screen size. Options are only decorated but show final idea.

@ Software, Downloads, Home/Entertainment Android, Java, XML

2011/03, private project, 1 developer
result: 2 simple versions are released and played by my daughter at the pad
dev. OS: Windows XP; target OS: Android; languages: Java; tools: Eclipse, Android API 1.6, Android SDK

It is my first Android project.
Training game: random floating random Ukrainian letters, tapping pronounces its sound, kid asked to tap the right one.

Download ABCRescue.apk and give it to your child to try. Idea is not finished.

@ Software, Downloads, Home/Entertainment Android, Java

2010-2011 (5 months), employer: “Promptlink Communications, Inc.”, full-time, Junior Java Developer, 4 developers
dev. OS: Windows 7; languages: Java SE 6, XML; tools: Eclipse, Tomcat, log4j, SVN, CVS, Bugzila, Junit, etc.

10 years in production products: IPS (WEB, Struts/GWT based, JSP) and CPM (Swing) for monitoring/controlling DOCSIS cable networks.
Learning Java, bugs fixing, corrections, refactoring and minor enhancements (projects contain about 10000 files totally).

@ Software, WEB/Network Java, XML

2010/09 (1 month), customer: “Promptlink Communications, Inc.”, full-time, Junior Java Developer, 1 developer
result: version without inheritance is released
dev. OS: Windows XP; languages: Java SE 6; tools: Eclipse, SVN, log4j

It is my first Java project.
One Distributor controls any number of remote Executors to fulfill the CLI/SNMP task list (each task with specified interval continuously or fixed number of times). Distributor implements load balancing of Executors using task’s weight and Executor’s load limit. Distributor logs results of all executed tasks. Distributor and Executors are auto connectible.

@ Software, WEB/Network Java

2010, private project 1 developer
result: implemented for my daughter
OS: Windows XP; tools: MS Power Point

MS Power Point presentation with table of Ukrainian letters which produce one’s sound on click.

Download Abetka PP Presentation with player. Extract files from archive and run play.bat. Click on letters.

Downloads, Home/Entertainment, Other, Phone/Sound

2009 (1 week), joint project 1 developer
result: implemented
OS: Windows XP; languages: VB 2008; tools: VS 2008, .NET 3.5

Simple GUI application for files encoding/decoding with free key file. Asked by my university teacher to test his encoding algorithm.

@ Software, Algorithms and Data Processing .NET, VB

2008-2010, private project, 1 developer
result: 15 samples are sold, PCB is designed, 3 variants are implemented
MC: ATtiny13-25-45; languages: С; tools: PN, AVR cross-compiler, Orcad

4 RGB LEDs generating random colors. Speed of blinking depends on ambient loudness. One implementation indicates room temperature as color.
Watch ones video Pyramid-Vid01 and HoldersWood-Vid01.
Read more…

Design, Home/Entertainment, Microcontrollers, PCB Design, Sensors/Detectors, USB C

2008, customer Bolotov B.V., outsourcing, 1 developer
result: 2 versions were implemented
tools: Oscilloscope & solder iron

1) 220 to 14kV multiplier (C-D);
2) switching one with 10kV output.
It is used to generate very hi-current pulsing as often as possible (<1 sec period).

Electronics, Power Units

2008, private project, 1 developer
result: designed 1 sample
dev. OS: Windows XP; MC: ATtiny13; languages: C; tools: PN, AVR C cross-compiler

Battery powered RGB LED for Christmas-tree that lights with random color/speed is wireless controlled (on/off) by external device (wire loop around the tree). RGB LED has MC color control.

Electronics, Home/Entertainment, Microcontrollers C

2008, private project, 1 developer
result: 50%: analog part was designed
dev. OS: Windows XP; MC: ATtiny13; languages: C; tools: PN, AVR C cross-compiler

Combined MC controlled source/receiver ultrasonic cell for distance/presence detector.

Electronics, Microcontrollers, Sensors/Detectors C

2007, customer Bolotov M.B., outsourcing, 1 developer
result: problems with output noise were solved
MC: i51; languages: Assembler i51; tools: Oscilloscope & solder iron

MC based 0,01-30 Hz sine wave sound generator with power amplifiers avails programmed changing of output frequency. FW was verified.
Power modes and construction were changed.

Electronics, Microcontrollers, Testing/Improving Assembler

2006-2007 (6 months), customer “Wi-Max Ukraine”, outsourcing, 1 developer
result: implemented, setup and still works at TV tower in Kyiv
OS/Hardware: Windows XP & Windows Server 2003 R2/ 6 PC rack; languages: VB 2005; tools: VS 2005, .NET 2.0, Direct Show Filters, Windows Media Services, Windows Media Encoder

– Rack of 6 PC (2 servers cluster + 4 streamers: 4 analog and 2 SDI video inputs). Assembled, fully set up, fast restore from backup CD included;
– ASF streamers (Windows Media Encoder) are configured for 3 bit-rates on demand broadcasting of input TV channels through Windows Server 2003 R2 cluster;
– VB 2005 written Windows Server 2003 service for cyclic cutting and storing video streams to file system (last 24 hours of each stream) for further editing or casting on demand with delay. HTTP logging;
– VB 2005 active object for WEB page embedding which plays video stream and makes possible saving it to local hard drive (building Direct Show Filter Graph).

@ Software, Other, TV/IPTV/Video, WEB/Network .NET, VB

2006, private project, 1 developer
result: developed & soldered, works but FW is not finished
dev. OS: Windows XP; MC: ATmega8; languages: C; tools: PN, AVR C cross-compiler

This project has common firmware for 3 following hardware implementations:
– Car clock with both red and green screens (watch its movie CarThermoClock_2Lines-Vid01);
– Large screen home clock;
– Large bi-color screen home clock: (red&green) segments indicator to set any composite color lighting (watch its movie RGThermoClock-Vid01).
Read more…

Home/Entertainment, Microcontrollers, Power Units, Sensors/Detectors C

2005, private project, 1 developer
result: sold 1 sample
dev. OS: Windows XP; MC: ATtiny26; languages: C; tools: PN, AVR C cross-compiler

Auto brightness (16 levels) with manual level correction, 0,1V step accumulator voltage indicator, LED screen auto off on car key (with 2 seconds lighting if any clock button is pressed). Accurate clock tuning (to 2 seconds per month error).
Switching power unit.

Home/Entertainment, Microcontrollers, Power Units, Sensors/Detectors C

2005, customer: private project, 1 developer
result: the sample works 6 years – time may be set only at midnight 🙂 due to leak of MC memory
dev. OS: Windows XP; MC: ATtiny26; languages: C; tools: PN, AVR C cross-compiler

50x50x25mm clock that shows time and 3 temperatures at 4 digits LED screen in sliding mode (corresponding value is shifted from 1 of 4 sides each 2,5 seconds). It has auto brightness with 16 levels controlled by light sensor. RGB color panel to show outside temperature with color was designed but was not realized in the code. Power unit is external.
Watch its movie ThermoHome-Vid01.

Home/Entertainment, Microcontrollers, Sensors/Detectors C

2005 (1.5 month), customer: “Sumix Corporation”, outsourcing, 1 developer
result: 1 sample was supplied
OS: Windows; MC: ATtiny26; languages: C; tools: PN, AVR C cross-compiler

Visible and infrared light levels sensing. Light is emitted through finger. 400Hz measurement cycle. PC input via COM port. Additional simple sensor of skin conductivity. Acquired data is collected and visualized with “Response” project based software.

Data Acquisition and Control, Microcontrollers, Sensors/Detectors C

2004, customer: private project, 1 developer
result: 8 and 2 channels versions were implemented
OS: Windows XP; tools: Orcad, oscilloscope & solder iron

2 channels per board adapters of phone line. Decoupled output to Sound Blaster input of PC, line on-hook sensing of each line via Joystick port. Amplifiers with auto gain control.
It was made to be used with ready software for calls registration Atropos-SB (http://www.cyteg.com/).

Design, Electronics, PCB Design, Phone/Sound

2003-2008 (8 months, 3 versions), customer: Doctor of Medicine, Prof. Vitaliy Zamostian (National University of “Kyiv-Mohyla Academy”), private project, 1 developer
result: 3 versions were implemented, installed and supported, it was used for experiments with mice
OS: Windows XP; languages: VB 2003-2008; tools: VS, .NET1.1-3.5, ready PC DAQ board LCard

This is the PC software that helps to execute experiments which are controlled by PC DAQ board. User may define experiment as the set of steps each with different DAQ input/output channels modes and condition of step finish. For user suitability any channel may be defined in user units and scale. Each channel has zero and scale calibrations. Step of the experiment defines common input channels registration parameters (sampling period, repeating period, number of registrations or step duration), different types of output pulsing and optional synchronization modes.
Download Response 1.1 Setup. You must have MS .NET 1.1 SP1 installed to run Response 1.1.
Package also installs this Russian Response 1.1 User Guide.
This Response 1.1 Experiment File Sample may be opened withing Response 1.1.
Play with mouse left/right double-clicks and dragging on chart’s scales. You may change size of each window. Move upper sliders to switch to another data registration. Set/remove rule by left/right mouse clicking on any chart or by double clicking row in the table. Rule is common for all windows. Read more…

@ Software, Data Acquisition and Control, Downloads .NET, VB

2003, customer: private project, 1 developer
result: implemented, 1 installation with camera & video-board was sold
OS: Windows 98; languages: VB 6.0; tools: Win32 VfW

Adjustable motion detector of the video source. My original algorithm of motion detection uses level sensing of square and/or size of brightness and/or edge changes in selectable region. It shows windows with intermediate results (brightness difference, edges, edge changes) and sensors activity diagrams. Optional sound signaling and video activity fragment saving are provided.

Download VigilantEye Setup.
Unfortunately it has only Russian interface. To use it properly expand red border of sensing region that may occasionally be collapsed to point when it is started. Read more…

@ Software, Algorithms and Data Processing, Downloads, Sensors/Detectors, Signal Processing, TV/IPTV/Video VB

2003 (2 months), customer: “Sumix Corporation”, full-time, 1 developer/tester
result: Noise and temperature dependency reduced dramatically, about 30 boards were corrected
OS: Windows 98; languages: VB 6.0; tools: oscilloscope & solder iron

Sumix developed SMX-110 USB camera was inspected and tested for picture noise. Picture noise testing application was written using ready API.
Power modes, PCB design and camera construction were corrected to achieve as minimal noise as supplied CMOS sensor avails.

@ Software, Electronics, Testing/Improving VB

2003 (2 months), customer: “Sumix Corporation”, full-time
result: Every day bugs detected
OS: Windows 98

2 projects were tested every other day. First is interferometer hardware/software, second – Java application for Cable Plant Monitoring and Control (CPM).

Other, Testing/Improving

2001-2002, customer: joint project, 1 developer
result: 5 samples were sold
OS: Windows; tools: Orcad

USB2.0 and USB1.1 to mini-ATA/ATAPI boards are developed (2.5” form-factor). Ready reference design of USB MC supplier (Cypress, CA) was improved. PCB (69x27mm, height is 9mm including board and chips) is designed and is manufactured. Cypress supplied firmware was used. USB2.0 pocket hard drive is formed as final product for HDD with height of 9,5mm (titanic black box). 5V x 800mA power unit was designed and included.

Design, Microcontrollers, PCB Design, Power Units, USB

2001 (1 months), customer: “Sumix Corporation”, outsourcing, 1 developer
result: implemented
OS: Windows 98; languages: VB 6.0; tools: VB 6.0

VB 6.0 OCX component and test application were developed to interact with сontroller of Interferometer.

@ Software, Data Acquisition and Control VB

2001, 2003 (2 months), customer: “Sumix Corporation”, outsourcing, 2 developers (with my father)
result: was designed and 2 controllers were implemented
OS: Windows 98; languages: C51; tools: oscilloscope & solder iron

AT89C52 based external interferometer controller had 4 10-bits DAC controlled LED channels with current intensity control, external and internal temperature sensors.
One 12-bit DAC output channel has slow but very low noise -40V-+300 output amplifier for piezo-positioner control. FW was written by my father. Controller has COM port PC interface.
Each channel may be programmed for auto incrementing with specified start value, value step and sign, start delay and step interval.
Multi-voltage power supplier was included.

Data Acquisition and Control, Microcontrollers, Power Units, Sensors/Detectors

2001, customer: private project, 1 developer
result: sold and used
OS: DOS; MC: AT89C52; languages: C; tools: TC 2.0, PN, i51 С cross-compiler

External MC based adapter detects on-hook line state, digitizes phone line signals and sends mixed stream of all active channels to PC via LPT port.
DOS software splits the stream and stores phone call data to separate WAV files for each active channel.
Access to stored data was made over network.

@ Software, Data Acquisition and Control, Microcontrollers, Phone/Sound C

2000 (1 month), customer: “Sumix Corporation”, full-time, 1 developer
result: released, then used by coders as base for C++ coding
OS: Windows 98; languages: VBA; tools: MS Excel

Fast algorithm for rough 3D image preview is developed with building graph within MS Excel. The input is the sequence (z) of interferometric pictures (x,y) got from interferometer’s camera . For each point (X,Y) of image its brightness produces sinusoid in z dimension. The aim of this algorithm is to detect quickly phase of sinusoids for each (x,y) point.

@ Software, Algorithms and Data Processing VBA

1999-2000 (10 months), customer: “Sumix Corporation”, full-time, Developer & Project manager, 4 developers
result: several WEB stores were implemented
OS: Linux; languages: TCL, HTML, SQL; tools: AOL server

WSE consists of flexible set of parameterized TCL scripts, Shopping cart (PERL) and Admin part for building Oracle based WEB Store with credit card payment.
My part was writing TCL scripts for DB data representing in HTML and Admin part for the store controlling and DB filling.

@ Software, WEB/Network HTML, SQL, TCL

1998-1999, customer: “Lucky Trade”, outsourcing, 1 developer
result: realized but not used
OS/Hardware: Windows 98; languages: VB 6.0, VBA, SQL; tools: Visual Basic, MS Access DB format, MS Office 97

Simple “CDPlant” based multi-user database for goods registration, goods movement and using tracking, planning and creating orders to manufacturers of goods based on current and minimal amount in the store.

@ Software, DBMS/ERP SQL, VB

1998 (1 month), customer: “Lucky Trade”, outsourcing, 1 developer
result: implemented and monthly used several years
OS: Windows 98; languages: C, VBA; tools: UUCP, MS Excel 97

Simple system for forming graphical bills and sending ones via E-Mail. Bill data was stored in MS Excel Sheet.

@ Software, Algorithms and Data Processing C, VBA

1998, customer: “IRIS Ukraine” (USA), outsourcing, 1 developer
result: implemented and used during several years
OS/Hardware: Windows 98; languages: VB 6.0, VBA; tools: VB, MS Excel 97

The goal of the project is PC to Office Phone Mini-station connecting, storing calls history, importing, sorting and filtering information about phone calls with MS Excel.
Mini-station was connected to PC over COM-port. Resident program logs data to temporary file. Excel macros adds new calls to history.

@ Software, Algorithms and Data Processing VB

1998, customer: private firm, outsourcing, 1 developer
result: realized but not used
OS/Hardware: Windows 9x; languages: VB 5.0, VBA, SQL; tools: Visual Basic, MS Access DB format, MS Office 97

“CDPlant” based DBMS for goods tracking.

@ Software, DBMS/ERP SQL, VB

1996-1998 (2 years), customer: “Mashel” & “Bolidisk” (1&2nd Compact Disk Manufacturing Plants in Ukraine), full-time, 1 – both developer and systems administrator
result: implemented and used starting 1 year of development
OS/Hardware: Windows 9x; languages: VB 3.0-5.0, VBA, SQL; tools: Visual Basic, MS Access DB format, MS Office

Multiuser System monitors CD manufacturing orders fulfillment. 12 possible parts of manufacturing process execution, in/out of stock. Second implemented version was able to calculate timing of orders at the moment of ordering. Different reports preparing using MS Word templates with special tags. Finally source code was 50 000 lines of VB. “Orders” DB table had 160 fields. Custom part of process interface customization was possible (manager, reception, designers, manufacturing, printing, packing, stocking, etc.) with different rights of access. DB had user friendly backup/restore procedures.
Custom record locking mechanism was made. Parametrized search, administrator controlled configurable tables.

@ Software, DBMS/ERP SQL, VB

1995-1996, customer: “Techsell”, Sweden, outsourcing, 2 developer
result: several versions were released
OS/Hardware: Windows 3.11/95; languages: VB 3.0, SQL

It was my first project which used Visual Basic and SQL.
Aim of our project was to make parameterized selections from ready team scheduler DB and to print results in different formats.

@ Software, DBMS/ERP SQL, VB

1992, customer: private entrepreneur, outsourcing, 1 developer
result: realized and used
OS/Hardware: DOS/PC; languages: C; tools: TC 2.0

Command line input, calculating and printing results of team tests. Algorithms of calculations were given by customer.

@ Software, Algorithms and Data Processing C

1991-1992, joint project: with Production Cooperative “Informtechnika”, 1 developer
result: sold 5 boards
OS/Hardware: DOS/PC/designed ISA boar; languages: C; tools: TC 2.0, oscilloscope

Developed board grabs composite video signal with 12MHz/8bits sampling. Data was written directly to PC RAM using Master mode of ISA bus. Board had about 40 logic DIPs and fast ADC.
Grabbed composite PAL signal data is decoded by software decoder to get color picture.

Read more…

@ Software, Algorithms and Data Processing, Data Acquisition and Control, Electronics, PCB Design, Signal Processing, TV/IPTV/Video C

1991-1992, project: me & my father (he was developing test model), 2 developers
result: written & tested, not implemented at blast furnace
OS/Hardware: DOS/PC; languages: C; tools: TC 2.0

Original task at blast furnace is the optimal control of gas flow. The key problem is that measured data for determining optimum gas flow is changed very slow and these changes are within measurement error. So this situation produces unstable systems of linear equations to get gas flow control.
Used algorithm is the part of A.N.Tikhonov’s work on regularization of ill-posed problems.
This program solves system of linear equations (20 variables, 3000 equations) with solution error about 10-20% while the same system solved by least-squares method gives error about 3000% (3 thousands %) – tested on model.

@ Software, Algorithms and Data Processing C

1990-1991 (9 months being student), customer: Zhitomir Trunk Telephone Station, outsourcing, 1 developer
result: 1 sample was implemented and tested, they had started serial manufacturing
OS/Hardware: DOS/designed MC board; languages: Assembler i8051; tools: i8051 cross assembler

This board (for Computer controlled TTS) substitutes analog one. It detects tones of coded phone number that is passed between TTS of cities.
Prior to digital board TTS had larger percentage of errors while number detection.
Board includes i8031 MC (i51 w/o internal ROM), RAM/ROM, phone line interface with analog filter of input signal, TTS rack interface (6 logical outputs for each tone in code) and switching power unit (TTS 24V to board’s power).

Microcontrollers, Phone/Sound, Power Units, Signal Processing Assembler

1990, student: my yearly project at Taras Shevchenko National University of Kyiv, 1 developer
result: succeeded
OS/Hardware: DOS/PC; languages: C; tools: Turbo C

Proofing of formula style theorems and printing the path of it’s proofing or mismatched axiom.

@ Software, Algorithms and Data Processing C

1990, aim: the gift for friend, 1 developer
result: was granted and was used during several years
hardware: soldered controller board; languages: Assembler i8080; tools: developed at i8080 based computer

MC board and FW were developed: i8080, 2kB ROM, NO RAM (only registers of CPU), 30 cyclic 1 tone melodies.

Home/Entertainment, Microcontrollers, Phone/Sound Assembler

1989, customer: private firm, 1 developer
result: 1 sample supplied and used
hardware: soldered controller board; languages: Assembler i8080; tools: developed at i8080 based computer

It was my first designed MC board: i8080, 2kB ROM, NO RAM (only registers of CPU), 8 digits 7-segment LED indicator, phone line interface, NO ADC (analog signal was sampled as bit stream).
Written FW: digital 6 tones caller number decoding and indicating.

Microcontrollers, Phone/Sound, Signal Processing Assembler

1989, private project: written at free time while being at Army of USSR, 2 developers
result: realized and used
OS/Hardware: i8080 like processor based computer; languages: assembler i8080; tools: paper & pencil

Tetris classic in text screen mode for i8080 based computer. Its design was improved and Tetris was implemented by my officer at his home computer.

@ Software, Home/Entertainment Assembler

1988, student: Taras Shevchenko National University of Kyiv, 1 developer
result: realized and used
OS/Hardware: RSX/PDP-11; languages: C; tools: TED

Packing structure and idea was thought out by me. It was just Huffman method packing :). But Huffman had better algorithm for building recoding table that is why it was used.

@ Software, Algorithms and Data Processing C

1987, aim: the gift for father, 1 developer
result: realized, granted but not used 🙂
OS/Hardware: RSX/PDP-11, target OS – CP/M; languages: C; tools: TED

TED like screen text editor.
It was like today’s TextBox component with multi-line capability and file operations.

@ Software, Algorithms and Data Processing C

1987, student: Taras Shevchenko National University of Kyiv, 1 developer
result: realized and used
OS/Hardware: RSX/PDP-11; languages: C; tools: TED

Game for teaching keyboard typing in text screen mode. Words were rockets lunched from 1 side of the screen. You had to type this word quickly and then this rocket was destroyed by anti-missile defense. Otherwise word-rocket destroys something. The idea was brought by my teacher.

@ Software, Home/Entertainment C

1987, student: Taras Shevchenko National University of Kyiv, 1 developer
result: realized and played over USSR
OS/Hardware: RSX/PDP-11; languages: C; tools: TED

Tetris like game in text screen mode. It has selectable brick size (3-5 points) and glass width (4-20).

@ Software, Home/Entertainment C

1987 (5 days), student: Taras Shevchenko National University of Kyiv, 1 developer
result: realized and played over USSR
OS/Hardware: RSX/PDP-11; languages: C; tools: TED

Tetris classic in text screen mode. Tetris is not my idea.
I’ve made it twice faster and having selectable glass width (4-20).

@ Software, Home/Entertainment C

1987, student: Taras Shevchenko National University of Kyiv, 1 developer
result: realized and played over USSR
OS/Hardware: RSX/PDP-11; languages: C; tools: TED

Tic-Tak-Toe that was accumulating playing history and improving it’s playing quality (counting symmetry of field).

@ Software, Home/Entertainment C

1987, student: my yearly project at Taras Shevchenko National University of Kyiv, 1 developer
result: realized with Turing machine software
OS/Hardware: RSX/PDP-11; languages: C; tools: TED

Program that executes Turing machine’s programs.
Several programs of Turing machine was realized for execution (hh:mm Digital Clock – about 25 instructions of Turing machine).

@ Software, Algorithms and Data Processing C

1986-1987, student: Taras Shevchenko National University of Kyiv, 1 developer
result: realized
OS/Hardware: RSX/PDP-11; languages: C; tools: TED

C like text preprocessor

@ Software, Algorithms and Data Processing C

1985-1986, customer: Kyiv Institute of Automatics (made for my father); outsourcing, 1 developer
result: tested and implemented as subroutine
hardware: analog of i8080 based USSR industrial controller for plants (KTS LIUS-2); languages: i8080 assembler and machine code; tools: paper & pencil

It was my first written and implemented program.
Driver of 10 digits indicator with animated shifting (new number appears from left/right and top/bottom with shifting).

@ Software, Algorithms and Data Processing Assembler

1983-1984, home and electronics section
result: hope it still works at my teacher’s home
tools: oscilloscope & solder iron

It was my first developed schematic. About 35 logic CMOS DIPs. Clock had 4 digits each of 27 red LEDs – ready military indicators with 4-bits logic input. It has external PS, backup battery and 5 minutes grid of alarm time.

Electronics, Home/Entertainment

1979, electronics section
result: it was working during several years
tools: solder iron

It was my first soldered device using ready schematic: 3 thyristor controlled 220V lamp garlands. Garlands of 20 lamps each were soldered by my father.
Later the control device was re-factored for random blinking.

Electronics, Home/Entertainment