Need some help with two projects

hello
i am having problems with to projects that were asked to build.
1º -> have to build a silent alarm, like a motion sensor but with a "laser" like the spy movies. i want it to activat a light located in a room when a person set into the laser;

2º -> have to build a light like the lights in a police car, but not for a normal car, it's for a car that my 2 years old nephew received in this christmas. he likes polices car and my sister asked me if i could build the damn lights... i want to build the lights like the example that i put attached with this post.

can anyone help??

ps: sorry if my english is not the best...

sal said:

hello
i am having problems with to projects that were asked to build.
1º -> have to build a silent alarm, like a motion sensor but with a "laser" like the spy movies. i want it to activat a light located in a room when a person set into the laser;

Click to expand...

No need for a real laser. Use infra-red as used in VCR remotes. Google will provide several circuits.

sal said:

2º -> have to build a light like the lights in a police car, but not for a normal car, it's for a car that my 2 years old nephew received in this christmas. he likes polices car and my sister asked me if i could build the damn lights... i want to build the lights like the example that i put attached with this post.

can anyone help??

ps: sorry if my english is not the best...

Click to expand...

For the lights, you could try this circuit:

http://www.newcircuits.com/project.php?id=prjsub001

3v0 thanks for the help but i know that i dont need to use a real laser, i just didn't know how to express my idea lol but thanks for the help.
and thanks for the help i_build_stuff to.