Lego One-Way to Two-Way Rotation Converter Mechanism Idea - Lego Technic Mastery - YouTube
LEGO Design
LEGO MOC One-Way-Gear (also works upside-down) by 2in1 | Rebrickable - Build with LEGO
Sariel.pl » Gears Tutorial
nxt - How can I make a precise one-way clutch using Technic elements? - Bricks
Easy push to reverse gear - no clutch used - half the normal size - press the yellow axle to switch the direction of the 12 tooth double bevel gear : r/lego