Schematic DIY KitDistance Warner / PDC Ultrasonic or radar
Many drivers and car drivers have difficulty parking. The rear view in the vehicle is usually fairly limited. With appropriate electronic eyes but it can be easier parking by creating an alarm should one object of the bumper come dangerous close. These circuits have prevailed in almost new cars as standard equipment. The dedicated electronics but built up something like itself, of course, a distance sensor can also take over other functions:
Door opener, alarm or Distanzmessgeraet just to name a few. Here are some links to distance measurement schematics.

Here you will find Schematic Circuit Diagram for DIY and further information on Distance Warner / PDC
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