The sound meter was built with piezoelectric buzzer in reverse, as a microphone which makes a single transistor amplifier demonstrate its functionality. This leads the piezoelectric element to make ...
Lucía Garbo has created an Arduino powered noise pollution monitor, powered by an Arduino Mega micro-controller and housed in a 3D printed case. Other components include a SparkFun Sound Detector and ...
This slideshow is based on the LEDs Design Ideas Collection, a collection of LED-related reader submitted circuits and design applications that have appeared in EDN's 'Design Ideas' section. Here you ...
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