Laser trip wire made with breadboard and laser.
On your door when someone walks in so they get scared. For robbers and criminals.
My door doesn't have a lock so an alarm would be great for my door. After trying this with arduino the code was messed up so i found out a different way. this way was much simpler and actually worked.
Some problems I had was the alarm and light would go on no matter what and the code for my origanal trip wire didn't work
COMPONENTS REQUIRED:- LDR, L.E.D, BC547 Transistor, 100k ohm resistor, 9v Battery, Buzzer & Breadboard, laser.
Step 1: Step 1
Connect all the wires to the breadboard and the battery.
Step 2: Step 2
Aim the laser at the sensor and when you interfere with the laser the alarm will go off.