On Thu, 03 May 2012 22:16:53 -0500, Jon Elson wrote: > Anders Wallin wrote: >> If someone really wanted to get into this on a hobby level there >> might >> be acceleration-sensors (made for e.g. airbag-triggers on cars) >> which >> could be used? >> Simply HAL-scoping commanded/actual position and maybe looking at >> their spectra might be a good start too. >> > Years ago there were vibration sensors from the oil exploration > industry > on the surplus > market. You might be able to find these, still, at flea markets. > Basically a magnet on > springs inside a coil. A speaker with a bit of mass added will work > fine, too. > You need a modest amplifier to pick up the signal from the voice > coil. > head-arm > motors out of a scrapped disk drive could also be used.
this would be fun to experiment with... EBo -- ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
