hi everyone

i need help in realizing the circuit in worksheet digital electronics- latches - Q20
http://www.allaboutcircuits.com/worksheets/latch.html

for detecting car driving in wrong direction of street.

component part numbers? (sensor, resistors, relay, ...)

thank you for your help

 

Didn't you learn about sensors, resistors, latches and relays in school?
Didn't your teacher give you a list of their part numbers or tell you where to find part numbers?

I think you should ask your teacher to help you begin this assignment, not us.

 

That was meant as a simple application of those devices, in reality, there are many more things to consider.

You'd be better off building something else...