Walnut control buttons for an Internet radio that had buttons that were far too small, 2.3.2024 
Bellow for Scheimpflug-images with Nikon Z-adaptor, 27.10.2023
Handle for pull switch kitchen lamp, 10.9.2023
Four more connector strips with switches and indicator lights (the commercially available ones always have broken switches after a few years), 16.6.2023
Wooden mushroom to protect an NMR magnet from magnetic objects, 7.11.2022
Art vending machine for Holger, which dispenses drawings or art objects by operating the handles on the side, 8.10.2022
Wooden digits for earrings for Paul, 2 cm high, 22.7.2022
Replacement handle for the nut mill whose plastic handle is broken, 19.6.2022
Refurbished kitchen board, 24.5.2022
Philippine nutshell stud earrings, 23.12.2021
Betel nut stud earrings, 23.12.2021
Textbook covers, 20.9.2021
Solar thermal system, 23.7.2021
Special stand with clamp connections for photomicrographs of a liquid X-ray lens, 11.6.2021
Coat hook in the shape of mushrooms painted with jungle animals, 30.5.2021
Brick wall joints, 7.5.2021
Sewage pipes renewed, 28.4.2021
Spiral-milled plexiglass discs for a liquid X-ray lens, 31.1.2021
Model of an X-ray lens with tilted lenses as decoration for a doctoral cap, 12.12.2020
Inlay for an old cutting board, 11.12.2020
Models of X-ray lenses made of aluminium, yew and elder wood, 26.5.2020
Model of a positioning unit for a CCD camera with trapezoidal solid state joints, 18.1.2020
Watchmaker's magnifying glass from lens "Pentacon auto 1.8/50 multi coating", yew, turned, oiled, 44 mm Ø x 37 mm, 30 g lens + 9 g wood, 31.8.2019
Garden stairs, 17.5.2019
X-ray zoom lens demonstrator as decoration for a doctoral cap, 18.12.2018
X-ray zoom lens with line focus, 13.6.2018
Positioning stand for an X-ray detector, 19.5.2018
Sewing thread bobbin box, 6.2.2018
Watchmaker's magnifying glass from lens "AF Nikkor 80-200 1:4.5-5.6 D", olive, turned, oiled, 36 mm Ø x 28 mm, 20.2 g, 13.1.2018
Watchmaker's magnifying glass from lens "Yashica 35-70 1:3.3-4.5 macro", yew, turned, oiled, 27 mm Ø x 30 mm, 6.8 g, 9.1.2018
Watchmaker's magnifying glass from objective, yew, turned, oiled, XXX mm Ø x XXX mm, 23.12.2017
Watchmaker's magnifying glass from lens "Meyer-Optik Görlitz Domiplan 2.8/50", olive, oiled, 55 mm x 23 mm x 10 mm, 22.12.2017
Manual spindle, 21.12.2017
Toaster repaired: new cable and new ivy wood knob, 24.8.2017
Half spheres for foot gymnastics, 1.8.2017
Adjustable fans to prevent mildew stains, 5.1.2017
X-ray zoom lens with actuators made of shape memory alloy wire, 30.12.2016
Copper coils for small magnets, wound with sewing machine, the wooden bases have 13 mm diameter 1.12.2016
Radiator cladding for the romping room of the school day care centre, primed for painting, 6.10.2016
Installing central heating, 19.6.2016
Olive wood honey lifter, 14.3.2016
Iron-on pearl passport photo, 25.1.2016
Round coverslip from microscopy glued to the inside of a eyeglass lens serves as a reading magnifier, 30.10.2015
50 m baseboards made from beech milled, sawn, varnished and installed, 23.6.2015
23 door panes cemented in, which were loose after the doors had been leached, 21.6.2015
Tree house, 06/2015
Table for router, 31.5.2015
Three door frames built, 31.5.2015
Toilet door, 17.5.2015
Terrace, 20.4.2015
Vacuum aspirators made of 3 mm brass tube, 5.3.2015
Casting keys, 25.1.2015
Child's denture, 22.1.2015
School cornet, 18.9.2015
Parabolic doctoral cap, 30.4.2014
Connector strip with switches and indicator lights (the commercially available ones always have broken switches after a few years), 13.7.2014
Replacement for lost toaster knob, 3.3.2014
Tamper to stuff coffee powder, 7.12.2013
Adapters for macro photography in reverse lens position, 4.8.2013
X-ray detector with 45°-mirror, 17.2.2013
Wooden balls of yew, cherry and walnut, 11/2012
Replacement umbrella handle, unknown wood from the castle park, 27.10.2012
Toothbrush stand, Andira wood, 04/2012
Earrings ebony with red seeds (pearl tree, Adenanthera pavonina?), 3.1.2012
Yard gate from Andira, replica of the old, rotten gate, 2011
Oak front door for Edelgard with double-glazed transom window and canopy, replica of the old, burnt and worm-eaten door from 1906, 2010
Model of an X-ray mirror optics, 2009
Model of refractive X-ray optics made of cigarette tubes for a doctoral hat, 2008
Model of a strongly reducing eccentric gear, 2007
Model of a refractive X-ray lens, 2006
Model of an X-ray optical bench; the two rows of pins symbolize two refractive X-ray lenses, the different positioning tables can be labeled so that one has a better idea of the directions of movement in the restricted area in the control room, 2006
Electric motor, 2005
Model of a chromatic distance sensor, the colour of the spot on the screen changes with the distance of the sensor from the screen; the centre colour is detected by the sensor and the distance is calculated from this, 2004
Model of a Fourier transform spectrometer (Michelson spectrometer) for the dissertation of Chr. Solf, 1.8.2003
VHF radio from a kit, nicely packed, soldered by Ada, about 07/2003
Model of a microspectrometer, 12/2002
Goggles with lamps against lack of light in winter, about 2000
Cardboard spectroscope and spectra of different light sources, about 1999
Decorated wall magnets, about 1996
Die ZEIT of 13.10.1995, cut and bound with cover motifs from the newspaper
Design of an energy saving lamp with electronics in the middle as reflector: compact design and more light in direction of the rotation axis, where normal energy saving lamps are quite dark; built for a job interview at Osram; because there was not much time, the white paint in the glass tubes never dried and so it shifted, which led to the unsightly holes in the paint, around 1995
New LCD-display soldered on, new housing and the laboratory multimeter from the scrap is functional again, 1994
Electronics for generating a controlled image with up to 500 Ampère in an already burning 480 Watt Xenon high pressure lamp, in the context of the diploma thesis "Optical absorption spectra of solvated electrons in polar media", 10/1993
Sock paternoster lift, model built for I. Schwarz
2. shadow theatre stage, about 1991
Light table: the frosted glass pane is still missing on top, about 1989
1. shadow theatre stage, about 1987
One-person tent that measures 2 m x 8 cm when packed and fits easily on a backpack when bent into a U-shape, around 1987
Candlestick, about 1987
Alarm horn for women; difficult to turn off, around 1986
Key cast from two-component adhesive, around 1985
Ebony earrings with book, around 1985
Jewellery box, around 1985
Model with swinging ball, about 1984
Power supply unit with self-made, stove-enamelled metal housing, about 1983
Two-shaft weaving frame with about 40 cm weaving width, about 1981
Spinning wheel, about 1981
Binary converter: If you press one of the nine clothespin buttons, the LEDs at the bottom left show the corresponding number binary; Werner and Jens built the object, I only used it in school, about 1980
Three-cylinder radial engine steam engine running with compressed air, with the shaft stationary and the cylinders rotating, sketches 11.2.1979, built in spring
Steam engine, which never ran because the cylinders have too small diameters, 1979