Build a See-Through Cyclone Dust Separator for Your Shop Vac | Make:
Finally got around to building a DIY cyclone dust extractor for my shop vac. Less than a $2 investment using buckets I already had and a bulk box of old Kirby vacuum
DIY Dyson-like workshop vacuum | TechCrunch
Homemade Mini Cyclone Vacuum Cleaner - HomemadeTools.net