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Ultrasonic Parking Assistant
Posted on Sunday, May 2, 2010   •   Category: Sensors

Ultrasonic Parking Assistant

The basic theory behind the Parking Assistant is the Sound Navigation and Ranging (SONAR) technique that is used for finding the distance and direction of a remote object underwater by transmitting sound waves and detecting reflections from it. First, a series of short ultrasonic pulses are transmitted using a transducer that changes voltage into sound waves. The transmitted pulse is reflected off an object, and the reflected wave is then received by another transducer that converts sound waves into voltage. The transmitted signal is also known as the ‘ping’ and the received signal is known as the ‘pong’. By counting the elapsed time between the ping and the pong, the distance between the device and an object can be easily calculated by multiplying the elapsed time with the speed of sound.

     Temperature Control using a DS1621 Sensor and a ATtiny 2313 Micrcontroller
     Solar Recorder
     Electronic Thermometer using LM35
     Light / Dark Relay Switch
     IR Proximity Sensor
     Digital Thermostat with LED Temperature Display
     Temperature Controlled Fan
     Park Assist Circuit
     Ultrasonic Parking Assistant
     Thermostat Controller with Relay using LM35 and TL431
Ultrasonic Parking Assistant

 

Build Accurate LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and reset function to make sure the readings are as accurate as possible ... [more]



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