This is the simplest sensor you will find for obstacle and collision sensing. It is basically a switch with a long handle (can be extend with external lever for better performance) which closes the switch everytime it collides with an obstacle. It is of small size and comes in a SPDT package. It is ..
DESCRIPTION:
This is a small micro switch sensor designed for the Arduino. It could be directly connected to the IO Expansion shield. It integrates the pull-up resistor and the status indicator LED onboard. That makes it easier for testing.The miniature snap-action micro switch with roller lever ..