doc:appunti:hardware:raspberrypi_abbaiometro
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Table of Contents
Abbaiometro con Raspberry Pi
Sound Sensor
I used a sound sensor based on the LM393 comparator IC. It is advertised as an Arduino sound sensor, sold for about 3-5 €.
Usage
Connect the + and G pins to 5 VCC and ground respectively: the L1 LED should turn on.
The L2 LED will turn ON when the sound level is above the threshold, which is regulated with the trimmer potentiometer. The POT is a multi turn (may be 10?) potentiometer: turn the mini screw clockwise to be more sensible (to lower the threshold) until the L2 stays ON at normal room noise, then turn the screw counter-clockwise until the LED goes off. Clapping your hands you should see the L2 LED blink.
doc/appunti/hardware/raspberrypi_abbaiometro.1449757361.txt.gz · Last modified: 2015/12/10 15:22 by niccolo