Many vehicles are fitted with ultrasonic sensors that let you know if you're getting too close to a wall or pedestrian, however the actual distance is not given. For those with a small garage this data can be quite useful when parking is tight, and thus a system has been created by Instructables member checho0180 to do just that.
Their system uses two Arduino-compatible circuits - one uses an ultrasonic distance sensor and a wireless data transmitter to send the distance measured between the wall and car to another circuit which is inside the motor vehicle, and displays the distance on an LCD - for example:
Then the driver can have a real-time display of the remaining distance when parking in a tight spot. For all the details, visit the project Instructable page. And for more, we're on facebook, twitter and Google+, so follow us for news and product updates as well.
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Apart from being idea for working with the various low-cost data links on the market, the shield can also be used to capture wireless weather station data, as described in the book "Practical Arduino". For more information and ideas, check out the product page.