More machining with Microscopes
Mike from Mike’s Models has also been using a Microscope for machining in his workshop. In his machining experiments with a USB microscope, he looks at the problem of drilling small holes and the drill wandering and also looks at
CNC stop button?

Need a big red stop button with a USB cable for your home built CNC machine? Perhaps this one from I Want One of Those would be appropriate?You would of course need to remove the cover and modify the functionality