need a HEEELP in circuit

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

joelumuna said:

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

Click to expand...

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

laser based sec. sys.

here is one ckt just try once...


u need to make a 3v ps for the ckt