need a HEEELP in circuit

[latino angel]

hey guys need a help.am doing a project called laser security system and here is the link where i v got the project
**broken link removed**
the problem is i need a circuit digram so i can start 2 build the circuit,cz i hv 2 know in which pin i have to connect the wire i mean from LM741 chip and also voltage relay.
so il be thankfull if any1 can help me in circuit digram.

 

[joelumuna]

if u want
i can give u security system circuit but it use infrared as sensor rather than laser

 

[gramo]

if u want
i can give u security system circuit but it use infrared as sensor rather than laser

Infrared is very easy to use, not to mention cheap

A directional IR LED mounted slightly back in a straw that's painted black should give you a decent directional beam

But the hard part (depending on your level of electronics) would be to create the modulated signal for the IR LED. A simple 555 circuit would do the job fine though

You can get "Logic Output" Infrared Receivers that are a standalone package that output 5V with the presents of a modulated signal, and 0V if not. Use that to drive whatever you want

Although I've only got a **broken link removed**, the fundamentals are the same

 

[tnuflora]

laser based sec. sys.

here is one ckt just try once...


u need to make a 3v ps for the ckt