Andrew Mayo wrote: > > I am quite curious as to how they control the little mirrors they sweep > the beam with etc, as this seems not to be well-documented - I'd be > interested to hear how you go. A solution could be a (thin) polished mirror fastened to the voice coil >from hard drive (per axis) I made a PID solenoid controller a few years ago (16C71) and used a Maxtor voice coil to test it. I was amazed at the hammering these little beasts can take without even heating up (1A 12V). They are extremely fast as well... -- Friendly Regards Tjaart van der Walt mailto:tjaart@wasp.co.za _____________________________________________________________ | WASP International http://www.wasp.co.za/~tjaart/index.html | | R&D Engineer : GSM peripheral services development | | Vehicle tracking | Telemetry systems | GSM data transfer | | Voice : +27-(0)11-622-8686 | Fax : +27-(0)11-622-8973 | | WGS-84 : 26¡10.52'S 28¡06.19'E | |_____________________________________________________________|