Circuit for Ultrasonic (Parking) Sensor
Does anyone know how to wire a basic ultrasonic transmitter/receiver to a car pc for distance measuring?
What I want, I think, is a sensor that every 5 seconds or so outputs a signal data1 on the parallel port,and simultaneously sends an ultrasonic pulse.
Then when the receiver receives the ultrasonic pulse,it sends a signal to data2 on the parallel port. Then software could easily work out the distance to the target.
Unfortunately my electronics skills are very lacking. I can find high-level ultrasonic sensors for ~$30, which seem to want to do their own thing. I can also find lowlevel sensors for ~$5,but that probably need extraneous circuitry (example: here).
Google isn't being helpful, not suprisingly since I don't really know what I am searching for.
Any help appreciated, thanks, Sam