Google+ post by Drew Fustini (pdp7) on 2016-03-31 15:42:10 UTC

Drew_Fustini_pdp7 (Drew Fustini (pdp7)) March 31, 2016, 3:42pm 1

http://hackaday.com/2016/03/29/spark-gap-and-coherer-meet-beagle-bone