Alex_rcpilot
Member
Looks pretty interesting.I've done the same when I was in high school.I used an SCR instead.Just in order anyone crosses the beam will trigger a circuit and make it work forever.A relay for example.I recorded a voice message in the terminal section of a tape and left the tape recorder playing.While the power to the tape recorder was temporarily cut off by the relay.When mom went back home she triggered the voice message.She got a little surprised....anyway it was interesting.
I suggest that you guys go with a microcontroller such as PIC.Most people here use it.By then you can use the photo sensor as an input of the system,and control as many various outputs as you wish.You want to know how many times the photo sensor has been blinded,then display the number on a couple of LEDs,and you can still control an alarm to sound or whatever you need to work to respond the movement.You've find more interest when you've learned how to do that.Good luck.
I suggest that you guys go with a microcontroller such as PIC.Most people here use it.By then you can use the photo sensor as an input of the system,and control as many various outputs as you wish.You want to know how many times the photo sensor has been blinded,then display the number on a couple of LEDs,and you can still control an alarm to sound or whatever you need to work to respond the movement.You've find more interest when you've learned how to do that.Good luck.