NJ Roadmap
New Member
I want to give someone a cool xmas present which consists of a simple circuit to activate a buzzer everytime someone walks past a laser beam.
Now I know it will be even cooler if I can make the beam visible from any angle (like in the movies). The question is how, and what its going to cost?
Now I know it will be even cooler if I can make the beam visible from any angle (like in the movies). The question is how, and what its going to cost?