I created this simple housing for my König CMP-PSUP450W/S ATX power supply unit.
I added two holes, one for a power switch and one for the cables.
I use this box with my RepRap Prusa Mendel 3D printer.

This PCB connects an mbed microcontroller board [1] to a Sparkfun Quadstepper Motor Driver Board [2].
I use it for my RepRap Prusa Mendel 3D printer but you can use it for any CNC machine.

The firmware [3] for the mbed board is based on the Tonokip firmware and is compatible to ReplicatorG using the fived driver.

There are jumpers for a 100k thermistor, a hot-end (via 3.3V mosfet) and a thumb-joystick.

Update: new version (mbedquadstepperminimalNOatmega8u2.brd) has 2 mosfets and 2 thermistors and 3 min-endstops pins... but no support for atmega8u2 or thumb joystick anymore...

[1] mbed.org
[2] sparkfun.com/products/10507
[3] github.com/renebohne/RepRap-Firmware-for-mbed-microcontroller

This is one part of a microphone clip for the Thomann t.bone SC300 microphone.

It broke 2 years ago and I always wanted to buy a spare part, but never found the time. Now I don't need to buy it anymore, since I have openSCAD and some 3D-printers :)

It might also work for other microphones, but I only tested it with the t.bone SC300.

Some code was taken from here: iheartrobotics.com/2011/02/openscad-tip-round-2-of-3.html

We created 10 RepRap Prusa Mendel 3D-printers at a workshop[1] in Aachen. The workshop was hosted by the FabLab Aachen[2] of the Media Computing Group and supervised by many helpers, including Josef Prusa.

Since we included a PCB Heatbead Mk1 [3], we had to modify the design for the "print plates"... the design was also used at the workshop in Maastricht (for 10 more RepRap Prusa Mendel printers).

The parts replace the following (listed in the Prusa Mendel BOM[4]):
225mm×225mm print top plate
140mm×225mm print bottom plate

[1]: hci.rwth-aachen.de/masterclass_3dprinter_18022011
[2]: fablab.rwth-aachen.de
[3]: thingiverse.com/thing:3919
[4]: reprap.org/wiki/Prusa -> Non-Printed Parts ("vitamins")