My past projects

Finished projects

K-Log - temperature logger prototype


October 2017
This device is made with STM32F103C8T6 microcontroller and DS18B20 temperature sensor. Timestamped temperature points are recorded to .csv on microSD memory card.
Blog post
Video

SMS GPS tracker


June 2017
Autonomous GPS tracker based on Arduino with some power-saving tricks. Instead of logging the GPS data, it sends the current location to its owner upon the mobile call.
Blog posts: part 1, part 2
Hackaday 
Video 

Interface board connecting industrial controllers and FischerTechnic construction sets


March 2017
It all started when the university decided that a course on PLC programming was incomplete without students controlling scale models of factories. Scale models were promptly found - Fischertechnik sold exactly the thing. I, in turn, was asked to provide the circutry required to connect real life PLCs to scale models with tiny 9V actuators and sensors. The fruits of my labor were five rev.1 boards and five rev.2 boards.
Blog post
Hackaday
Hackster.io
Publication
Video

WS2811 POV display on PC fan


April 2018
Made specifically to impress people on national qualifications of Eurobot 2018 contest.
Blog post
Hackaday
Hackster.io
Video

Wireless sensor/actuator network with CC430 RF SoC.


First half of 2014.
This was the project on which I based my thesis, entry in Texas Instruments Analog Design Contest'14 and Hackaday Prize 2014 simultaneously.A network of wireless sensor and actuator nodes made to control an automated greenhouse.
Blog post
Hackaday.io

A brewing tank out of Soviet top-load washing machine


Second half of 2016
Can you repurpose the old crap washing machine into something useful? I gave it a try. The resulting device is PID-controlled heater from a kettle embedded into the washing machine's tank. This allows keeping the temperature constant for mashing.
Blog post about assembly (google translate)
PID setup blog post (google translate)

Old clock Elektronika 7 brought back to life with LED indicators


Summer 2014
Total redesign of something I basically got during a dumpster dive: Soviet vacuum fluorescent clock Elektronika 7. Only the front glass and a metal frame inside survived my ruthless gutting, the rest being replaced with modern parts.
Blog post (google translate)

Garage heater controlled via text messages.


Fall 2016
Made a garage heating system out of a heating element, huge pipe segment, fan and various electronic parts. Now I can text 'On' to a specific number about one hour prior to my arrival to the garage, and it's going to be pre-heated. Quite convenient in cold winters of Russia!
Blog post

Infrared remote controlled light switch with ATTiny2313


Summer 2014
How to replace a common household light switch with something that you can switch on and off with your TV remote control? Read to learn how I did it.
Hackaday
Blog post

AC power + battery backup for portable tankless gas water heater


Summer 2017
Uninterruptible power supply for your gas heater. Works exactly like the one for PCs: when the mains voltage is OK, it powers the heater with mains power and charges the batteries (I used 2 cellphone batteries). During the outage it flips gas heater's 3V input to stabilized battery voltage.
Blog post
Hackaday

Bench PSU out of computer PSU


First half of 2017
When you design electronics, you tend to demand a lot from your power supply. Multiple output channels, variable voltage, current measurement - not every market-available bench top PSU can offer all the range, and those that do usually cost a fortune.Why not make a perfect bench power supply from one thing everyone can afford - a computer PSU?
Blog post

DIY hadware watchdog for PC


January 2018
A really simplistic project - watchdog timer for PC made with one Arduino Uno and one reed relay. What makes it special is Java code that makes it tick and the fact that everyone can make it.
Blog post
Hackaday
Arduino blog
Video

Time fountain


July 2014
Here's how a time fountain works: water mixed with fluorescent paint (from a felt tip highlighter) is pumped up to a certain height, then it drips down in single drops. Infrared LEDs light up the drops from both sides at a specific frequency. When you adjust the frequency, you can make the drops appear to stand still or even "fall up".
Another video

Liquid contamination sensor


Second half of 2012
The whole device was assembled by the company, but they hired me to write the firmware (PIC16F877). Principle of operation is this: liquid (usually oil) is pumped through the tiny slit with an optical sensor, the resulting pulse train is counted and converted to the liquid's purity class.
Manufacturer's website

Remote controlled fully functional combine harvester scale model


Fall 2012
Made per request from Agriculture University. Bruder's scale model of John Deere Combine Harvester T670i (what's with me and scale models?) was turned into a remote control model of real harvester with every aspect of it operational - combine head can be raised/dropped, grain auger extended/retracted and switched on and off. The whole remote control is accomplished via Bluetooth and C++ application written with Qt framework.

Remote controlled fully functional Tractor scale model


Winter 2012
Logical extension of the previous combine harvester model. Also Bluetooth-operated. Besides the basic tractor's ability to drive (duh..) this one has a set of parking assistant sensors to keep it driving aligned aside combine harvester.

Plasma speaker


September 2012
Can be plugged into any audio source equipped with 3.5mm jack, acting as a replacement for conventional speakers. High-voltage spark will be modulated to your music, effectively giving you a spark that plays the music. Shortly after filming the video I stuffed it into an old plotter's enclosure:

Spot welder


March 2016
How to use the microwave oven creatively, especially when you already tried stuffing every single thing inside? Well, you can use the transformer connected backwards to make a welding machine. This machine can weld tiny parts that your run-of-the-mill stick welder will melt to a puddle.

Charger for 12V batteries

End of 2015

Unfinished projects

Smart house


Second half of 2015
Ambitious cooperation between me and my friends. The idea was to create a voice controlled smart home (but wait, there's more!)  with voice recognition that woks offline. Even though the project itself dwindled down to nothing, my experience with Vocore board culminated in this post.

CNC machine + stepper driver


End of 2012
Another audacious project that I personally had to abandon due to lack of experience in mechanical engineering. That's why, after assembling the whole machine frame out of sticks and mud and stepper driving board, I had to dismantle the whole thing - lots of inaccuracy problems and I didn't have the heart to dig at them all.

PH probe interface


End of 2017
PH probe measurement usually involves negative voltages, and not every microcontroller board can boast anything other than positive supply rail. With this circuit, you'd only need an Arduino, for instance, to supply 5V and measure PH with one ADC channel.

Power outage detector


February 2018
Quite a niche device a family friend once asked me to build, this bunch of wires in laptop's charger enclosure stays most of the time plugged into the wall, beeping like mad during the power outage. Why? To wake up someone who wants to know when there's an outage.

Smart parking assistant


End of 2017
Was abandoned after a thorough market dig turning up similar products (Nedap sensit and Libelium smart parking) as well as much cheaper alternatives (DingTek DO100, ROSIM WPSD-340)
Github

Clock


First half of 2013
My first take at building a complex microcontroller device from scratch. ATTiny2113 in its core, supercapacitor-backed RTC.

Escape rooms

Maze


January 2016
The most complex device for escape rooms I've been asked to make. It's got one huge plexiglass panel with 64 independently controlled LEDs arranged as a maze, and another panel with 64 buttons mirrored with LEDs for navigation. After solving a maze there's also relatively simple escape routine depending on the number of players in the room (which is set by the operator).

The bomb


March 2016
This was easy to make, though hard to carry in the open for obvious reasons 😀

Time machine


April 2016
Players enter the metal encased room (this is the time machine). It's dark inside, the only source of light being a small light up display. The room also has a huge flat-screen TV on the ceiling. The players travel back in time after typing the correct date on the keypad (the device switches on the floor-shaking motor and the video sequence of major historical events in reverse order). The door opens up, releasing the players into the "past" where the whole game takes place. To exit the game, they must enter the today's date on the same keypad and travel back to contemporary time.

Fingerprint scanner


December 2015
Common code-protected electromagnet-locked door, with one interesting addition - to open this one, you'll have to find some scientist's severed finger and scan it.

Introductory movie projector


December 2015
Introductory video for the escape room scenario - to launch it, the player has to solve a puzzle first.

Mangler


December 2015
A giant mincer. To exit the room, you'll have to figure out how to start it. Knowledge of basic electrics helps.

Taps


December 2015
Weird contraption I don't even remember the point of anymore. The thing is, there's 2 taps and you have to turn them to set temperature on LED display to predefined value four times, thus unlocking the exit hatch.

Password protected locks


First half of 2016
Another take on making the boring coded locks interesting - adding funny sounds when you press buttons.

Other escape room stuff that I didn't film a video about

Claustrophobia -Behind the scenes

Landline phone. Dialing a secret number plays a pre-recorded message, dialing any other number - another message.


Skeleton in the closet. As soon as players place the skull on skeleton's shoulders, they hear it exclaiming something like "complete at last". Then, a door unlocks.


Gramophone - after plugging a perforated tape into the gramophone and playing it by turning the handle, the players hear the melody they just reproduced on the speakers and unlock the next puzzle.


Miniature animated scene - each switch does either toggles the lights or opens/closes the door on the scene. Setting them in correct sequence will open the chest nearby.


Short circuit - when you open the door, it powers up the final device. After five seconds it cuts the power simulating the short curcuit with noises and visual effects.


Prompter's booth. It's simple - you have to find the prompter's book of lines and put it back into the booth. This will open the door.


Projector + brick in the wall. This one is a bit tricky. Players have to pick one colored glass out of a whole stack and plug in into the projector. If the color is right, the projector will become operable.Then, lighting up one inconspicuously-looking brick in the wall will reveal the secret message.


Mixing console. Really complex device for end of game scenario. Includes solving sudoku puzzle with color-coded audio jacks and total control of the scene in the room (projectors, scenic curtains etc.).

Claustrophobia - Steampunk train

Turnstile. To get into the train, players will have to present their pass.


A couple more phones - one of them with faux-rotary-dial thing, another one with the real deal. The real rotary dial was especially fun to hack - it closed a switch momentarily for each number dialed.


Table with a breadbox. What you see on the second pictures are holes with RFID readers that were covered afterwards. A set of RFID tags is implaned into the cups and saucers. Arranging the china in correct order will trigger the breadbox to open.


Two fog machines for extra immersion into the train atmosphere. One of them puffs into the room when a player opens a window, another one stands in the trench in fron of the train and produces fog at set intervals.

Sabotage - The walking dead

"Glass" vials. Quite similar to the table with breadbox I made before, only there's 6 readers now, and arranging them pushes the prize from the ledge.


Exit revision 1. Player puts the vaccine on the pillar to get out.


Exit revision 2. Player has to pour vaccine into the flask to get out. Was quickly reverted to rev. 1 due to clumsy players splashing water every which way :) . Also on the picture - replacement flask.

References to my blog

Neoway M590 GPRS tutorial - Dangerousprototypes.com
Neoway M590 GPRS tutorial - Electronicsinfoline.com

Tiva and Stellaris Launchpad RTC usage - Dangerousprototypes.com
Tiva and Stellaris Launchpad RTC usage - Hackaday.com

Use Platformio to develop for BluePill with Arduino framework - Hackaday.com
Use Platformio to develop for BluePill with Arduino framework - stm32duino.com
Use Platformio to develop for BluePill with Arduino framework - bluepill.cz (Google Translate)

VOCore Tutorial - Hackaday.com

Robotics

Mobrob team, Robofest robotics event (April 5 2012, Moscow)
1st place in "Navigation", "Defile" и "Team event"

"Robocross" self driving cars contest (July 10-14 2013, Nizhniy Novgorod)
3 place

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