# Key Ideas from #hplusroadmap IRC Discussion

• Participants discussed developing SKDB, an open-source alternative to Thingiverse with advanced features like revision control, dependency management, and package management, preferring STEP and IGES models over STL files.

• An open-source repetitive transcranial magnetic stimulation (rTMS) project was mentioned, with research papers available at http://adl.serveftp.org/papers/open-rtms/, showing interest in DIY neurostimulation technology.

• The group explored repurposing DVD/Blu-ray technology for microfluidics and fabrication, noting their precise speed control and positioning capabilities (to 1 micron accuracy) could function as spin coaters or automated pattern depositors for DNA synthesis.

• Alternative microfluidics fabrication techniques were discussed, including "shrinky-dink" methods and using the QuicKutz Silhouette SD digital craft cutter ($250) for creating microfluidic devices.

• Participants shared knowledge about electrorheological and magnetorheological fluids that change viscosity under voltage or magnetic fields, suggesting applications in adaptive clothing or armor.

• The conversation included references to biological manufacturing, specifically E. coli producing PLA (polylactic acid) for RepRap 3D printing materials, linking to http://blog.reprap.org/2009/11/bugs-brew-pla-direct.html.

• Technical discussions covered reverse engineering DLLs with code injection methods, cycloidal gear designs for mechanical systems, and MIT Media Lab's Bokode visual tagging system that uses angular modulation for distance reading.