IR distance sensor? Answered
im looking for a way to detect distance (around 4 feets) using IR.
basically a person will carry the IR transmitter and walk around until he comes across an IR receiver. the receiver is connected to a buzzer where the buzzer will emit louder sound as the user getting near to the receiver.
can this be done by using ir transmitter and receiver led?
any other better suggestion is welcome
thank you for your reply