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An Ultrasonic Parking Radar

Build it and avoid those parking mishaps.

Design By Branco Justic*

Parking a car is a real problem for many people. They can’t!

Unless there is a shop window to reflect off they simply have no idea how to judge the distance between the back of their car and the front of the next.

Click for larger image
Ready to mount on the bumper bar or other suitable location, the Ultrasonic Parking Radar is simple to build, automatic in use and could save you $$$!

They either make life very hard for themselves, making what should be a three-point parking a ten or twenty point saga (you think we’re joking?) or, worse still, stop reversing when their tow bar has made a nice little scallop in the number plate of the car behind.

Even a slight touch on a modern car can cost thousands of dollars to repair, especially where integral, moul-ded (or non-existent) bumper bars or too-sensitive air bag sensors are involved.

So what’s the answer?

Here it is – a small ultrasonic transmitter/receiver which warns you when you’re getting too close. It’s designed to fit to the back bumper (or other suitable location) of your car and sounds a buzzer or closes a relay when you’re within the range you set – anything from about a metre down to just a few centimetres.

While designed for the specific purpose of parking, there are other applications where you might want to sense objects that come within range – security is one which springs to mind, perhaps even things like vehicles or other objects going past or through a small opening.

It’s all housed on one PC board (even the ultrasonic transducers) which can all fit into a small disposals plastic case, ready for mounting on the car.

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