A line of high purity calcined alumina optics polishing abrasives offered in seven particle sizes that are ready-to-mix with de-ionized water has been introduced by Meller Optics, Inc. PROVIDENCE, R.I ...

It seemed like a good idea to build a semiconductor lapping machine from an old hard drive. But there’s just something a little off about [electronupdate]’s build, and we think the Hackaday community ...