For those of you who want to build a Dyson vac-like vacuum with cyclonic vacuum feature, you might want to check out this DIY that shows you how to make a cyclonic vacuum. It ain’t anywhere like a Dyson but it may serve as a good alternative if you don’t need all the bells and whistles for paying couple hundred dollar on a high quality vacuum.
A cyclonic separator is used in workshops to keep larger cruft out of the dust collection system. The airflow insid