This is the simplest cyclone I could come up with.
Step 1: You Will Need
To complete this project, you will need a car cleaning nozzle and hose from your shop vac. A large bucket with a tight fitting cover. A straight coupling to attach your shop vac hose.
Step 2: Mark Placement
Mark the placement for your nozzle by tracing the nozzle. Mine measured about 3 1/2" long and was the same width as the nozzle.
Step 3: Cut Out the Spot for the Nozzle
Using a vibrating saw, cut out 3 sides.
Step 4: Glue in the Nozzle
Put the nozzle in it's place. Using a hot glue gun, glue the nozzle from the inside. Then, still using the hot glue gun, go around all the seams from the outside to insure an air tight fit.
Step 5: Install Top Coupling
Lastly, drill a hole in the cover. Be sure to make the hole the same size as the shop vac coupling. Placed the coupling in the hole. Using a hot glue gun, glue the coupling in place.