The Gathering for Open Science Hardware (GOSH) is new annual conference for those building and using Open Source Hardware (OSHW) for scientific research:
The GOSH movement seeks to reduce barriers between diverse creators and users of scientific tools to support the pursuit and growth of knowledge.
GOSH 2016 took place at CERN
last March with an excellent keynote by Javier Serrano
Video of talks at GOSH 2016:
GOSH 2016 Day 1 part 1: Grand Challenges
You can apply to attend GOSH 2017, 22-25 March 2017 at the Innovation Centre at Pontificia Universidad Católica de Chile in Santiago, Chile: