doc:appunti:hardware:raspberrypi_abbaiometro
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doc:appunti:hardware:raspberrypi_abbaiometro [2015/12/10 15:29] – niccolo | doc:appunti:hardware:raspberrypi_abbaiometro [2015/12/10 15:34] (current) – niccolo | ||
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===== The Sound Sensor ===== | ===== The Sound Sensor ===== | ||
- | {{.: | + | {{.: |
- | I used a sound sensor based on the **LM393** comparator IC. It is advertised as an Arduino | + | I used a sound sensor based on the **LM393** comparator IC. It is advertised as an Arduino |
==== Usage ==== | ==== Usage ==== | ||
- | Connect the **+** and **G** pins to **5 VCC** and **ground** respectively: | + | Connect the **+** and **G** pins to **5 VCC** and **ground** respectively: |
- | 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: | + | 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: |
When the sound is above the threshold, a digital **high signal** is sent across the **DO** (digital output) pin. | When the sound is above the threshold, a digital **high signal** is sent across the **DO** (digital output) pin. |
doc/appunti/hardware/raspberrypi_abbaiometro.1449757790.txt.gz · Last modified: 2015/12/10 15:29 by niccolo