The Reissdorf figure as a light-up sign
Multicoloured light wire, a 3D-printed housing, controlled by an Arduino Nano.
Windows program
Aktenlage: filing for paper documents
Aktenlage scans paper documents, recognises the text and files every letter as a searchable PDF.
- Recognition: Sender, date, amount and deadlines are recognised automatically.
- Separation: A scanned stack is split into individual documents.
- Privacy: Everything runs on the local computer, with no cloud and no user account.
€49one-off, incl. VAT · all 1.x versions
Trial version: 50 pages, no registration. Windows 10 (version 1809 or later) or Windows 11.
Aktenlage in one minute (with sound)
Programs for Windows
One-off purchase, no subscription, no account. Data stays on the local computer, and every program can be tried before buying.
Mietfix
For private landlordsService charge statements for small rental buildings, with the calculation shown for every item.
One-off purchase · €29
Vokabelwerk
For learnersVocabulary trainer that repeats at the right intervals and explains mistakes.
One-off purchase · €19
Tabula
For teachersMark book that works out every report grade and stores it encrypted.
One-off purchase · €29
Wegweiser
For personal emergency planningEmergency records, organised and encrypted, printed as a wallet card, an emergency sheet and a folder.
One-off purchase · €9Apps for Android
No ads and no user account. Entries and game progress stay on the phone; purchases and leaderboards run through Google Play.
Tendly
Habit tracker in which every completed habit makes a plant grow.
On Google Play · Premium optional
Squishly
Endless jumping game with 20 characters and 26 worlds, also playable in the browser.
On Google Play · optional in-app purchases
Merger
Number puzzle with merging blocks, also playable in the browser.
Coming to Google Play
Durchschaut
Mind game against an oracle that predicts the pick, also playable in the browser.
Coming to Google Play
Wortschmiede
Word game in which word parts fuse into long German words, also playable in the browser.
Coming to Google Play
Rieselzeit
Hourglass puzzles in which an exact time has to be measured, also playable in the browser.
Coming to Google Play
BeepHunt
Locates beeping devices in the home by their signal tone.
On Google Play · €2.99From the workshop
Tools for retail, machines and electronics, most of them ready to try in the browser.
View all projects- KontorInventory management with till, rentals and stocktakingIn development
- Foot analysisFoot measurement for ski boot size and last widthIn use
- Artikel-AnlegerShopware products straight from incoming goodsIn development
- Shop web designShopware theme for Muskelkater SportLive
- FabrikonIdle tycoon for Android with 24 factoriesClosed testing
- Cocktail machineESP32 in Rust, two axes, controlled from the browserDemo
- ArmControlFour-axis robot arm with its own firmware and 3D simulationDemo
- Engineering playgroundCrank drive, gears, vibration and Fourier seriesDemo
- Aperol machineArduino Nano, three pumps, five strength levelsDemo
- BusfahrenThe pub card game as a handheld with Arduino and LCDDemo
Videos from the workshop
Short clips, each under ninety seconds. The videos load from YouTube (Google) only when played.
Jetpack with fog and light
Carnival costume with fog as the exhaust jet and lit tanks, operated from the browser.
Jetpack: prototype on the workbench
Test setup with fog module and circuit boards, before fitting into the housing.
Cocktail machine in operation
Aluminium profile frame with pumps on the bottles, operated from the browser. Project page
More about YouTube in the privacy policy. The light-up sign is a private replica with no connection to the Heinrich Reissdorf brewery; the trademark belongs to the brewery.
Hello, I'm Timo.
Apprenticeship as a precision mechanic, degree in mechanical engineering, almost three years designing integrally geared turbo compressors at Atlas Copco in Cologne, and since August 2026 machine learning for predictive maintenance there.
The programs grow out of everyday tasks. I answer enquiries personally.
- Profession
- Mechanical engineer at Atlas Copco in Cologne
- Tools
- Python, JavaScript, PHP, C++ on microcontrollers
Questions about the programs?
Timo Britz answers enquiries himself.