Changing amplitude example to output values in dB (#24)

OmarAli3 · web-flow · commit ce85b718190f · 2020-12-17T09:23:36.000+01:00
diff --git a/examples/AmplitudeSerialPlotter/AmplitudeSerialPlotter.ino b/examples/AmplitudeSerialPlotter/AmplitudeSerialPlotter.ino
@@ -49,8 +49,9 @@ void loop() {
   if (amplitudeAnalyzer.available()) {
     // read the new amplitude
     int amplitude = amplitudeAnalyzer.read();
-
-    // print out the amplititude to the serial monitor
-    Serial.println(amplitude);
+    //dB relative to full scale
+    int dpFS = 20 * log10(abs(amplitude));
+    // print out the decibel to the serial monitor
+    Serial.println(dpFS);
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -49,8 +49,9 @@ void loop() {`
`49`	`49`	`if (amplitudeAnalyzer.available()) {`
`50`	`50`	`// read the new amplitude`
`51`	`51`	`int amplitude = amplitudeAnalyzer.read();`
`52`		`-`
`53`		`- // print out the amplititude to the serial monitor`
`54`		`- Serial.println(amplitude);`
	`52`	`+ //dB relative to full scale`
	`53`	`+ int dpFS = 20 * log10(abs(amplitude));`
	`54`	`+ // print out the decibel to the serial monitor`
	`55`	`+ Serial.println(dpFS);`
`55`	`56`	`}`
`56`	`57`	`}`