HI
This is one of my 1st post's so bare with me.
Basically i have a problem, i have a few weeks to make a simply proximity sensor for my AS electronics.
It has to be as simply as possible, and be on a single unit. not one of those broken been IR kind of things.
I have found a link with a video that shows the what i would like to create. but i dont know how to create it, and as i cannot use PIC or any other chips. just 555 timers etc.and i have to make it all myself.... i am unsure of how to do so.
Any help would be greatfully appreciated. o and it has to run off 12v s max.
Here s the link to the video
**broken link removed**