Add varying signal amplitude to Galea v4 emulator

Author: retiutut

emulator/brainflow_emulator/galea_manual_v4.py

@@ -88,7 +88,10 @@ def run(self):
                                 if (self.debug_mode):
                                     print(t, i, channel)
                             if (self.channel_on_off[channel - 1] == 1):
-                                single_package.append(random.randint(0, 80))
+                                if (sample % 3 == 2):
+                                    single_package.append(random.randint(0, 8 + (channel * 2)))
+                                else:
+                                    single_package.append(0)
                             else:
                                single_package.append(0)
                         else: