Add links to Recorder example

examples/Recorder/Recorder.ino

@@ -33,6 +33,11 @@ AudioControlSGTL5000     sgtl5000_1;     //xy=265,212
 // For a stereo recording version, see this forum thread:
 // https://forum.pjrc.com/threads/46150?p=158388&viewfull=1#post158388
 
+// A much more advanced sound recording and data logging project:
+// https://github.com/WMXZ-EU/microSoundRecorder
+// https://github.com/WMXZ-EU/microSoundRecorder/wiki/Hardware-setup
+// https://forum.pjrc.com/threads/52175?p=185386&viewfull=1#post185386
+
 // Bounce objects to easily and reliably read the buttons
 Bounce buttonRecord = Bounce(0, 8);
 Bounce buttonStop =   Bounce(1, 8);  // 8 = 8 ms debounce time