A Giant 3D Printer, a Desktop Train Departure Display, a Portable Lightning Detector, a Pick and Place Delta Robot + More — BigFDM: Open Source, Large Scale 3D Printer BigFDM has a printing area of 800 x 800 x 900mm, a BOM less than $3,000, and can be made in any fab lab near to you! Raspberry Pi Powered Live Train Station Desktop Sign Build a live train departure display for your desk with a Raspberry Pi Zero W and OLED screen.