[cctalk] mains stroboscope / was Re: Running DOS executables on other versions of DOSRe: Looking for Sharp PC-5000 disk drive (CE-510F or possibly MZ-80B)

The old common standard for a mains stroboscope was a neon bulb (+resistor). They are still widely available, simple and inexpensive. No, they are not very bright and need some shading or otherwise reduced ambient light, but for a tool of infrequent use...