Rocker switch to isolate the battery.

Levers activate the gripping hand/pincer mechanism,.

Simple effective design, results can be altered by using different bands.

This simple arch bridge has amazing strength.

Includes a control box to activate the motion..

Uses a worm drive for low gearing.

Does require sunlight to function effectively.

Use a series of gears.

Light sensors and a pcb provide the means for automated lane control.