[Klaus] wanted some sort of aid for parking his car, and after running across a $4 ultrasonic sensor, decided to build his own
speaking distance sensor (.de,
Google Translation). Inside [Klaus]‘ device is an Arduino Uno, an HC-SR04 ultrasonic distance sensor, and an
Adafruit Wave Shield. Originally, this parking/distance sensor used a small TFT to display the distance to an object, but after a few revisions, [Klaus] redesigned the device to speak the current distance, courtesy of an SD card and a soothing female voice.
Right now, the voice is set up to speak the distance from an object to the sensor from 10 cm to 1 m in 5cm increments. This isn’t the limit of the sensor, though, and the device can be easily reconfigured to sense a distance up to four meters. The board doesn’t have an amplifier or speaker, but with the addition of
a small amplifier, [Klaus]‘ device is loud enough to be heard in even the noisiest environments.
Video demo below.
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