drone grain/seeds dropper

thingiverse

very small, light weight (about 50 gram) grain dropper using small geared motor for small / middle size drone. designed to use PET bottle for the grain container (compatible thread) grain is transported by screw conveyer mechanism for adjustable amount of dropping. no support setting, please cut between short column and screw so that screw can rotate without difficulty (0.4mm distance to the wall). US$3, gear motor using 6V 100rpm with long 3mm bolt drive this motor using 5V or 4.3V with lithium ion battery gives you about 60 rotate per minutes. US2$ winch motor driver to drive this motor connecting to RC receiver remotely gives you free adjustment of speed and direction up to 1.5A (is enough for this dropper) p.s. oops, when I screwed in the bottle, bottle interfered the screw conveyer. so I modified the design a bit. please re-download if you download the model before March 3,2022 . Thanks! p.s.2 last image: There was still a minor modification needed in some printer, distance between internal screw and support-like column should be narrower to prevent partial screw malforming. March 9 2022.