Laser Home Security System | Science Project | New<br /><br />School Project<br /><br />Use Components-<br /><br />1- Two BC547 Transistor<br /><br />2- Two 1k Resistance<br /><br />3- LDR Sensor<br /><br />4- LED<br /><br />5- Buzzer<br /><br />6- Battery Cap<br /><br />7-9 volt Battery<br /><br />8- Laser Light<br /><br />9- Mirror<br /><br />Science Project,<br />Science Model,<br />Science Experiment,<br />Science,<br />science project,
