Index: fact/FPG/FPG1/FPG1.pde
===================================================================
--- fact/FPG/FPG1/FPG1.pde	(revision 12573)
+++ fact/FPG/FPG1/FPG1.pde	(revision 12574)
@@ -10,5 +10,8 @@
 
 void loop() {
-  digitalWrite(triggerPin, LOW);
+
+ // comment out the following line
+ // to stop trigger production
+ digitalWrite(triggerPin, LOW);  
  digitalWrite(triggerPin, HIGH);