diff --git a/Geigerzaehler/main.c b/Geigerzaehler/main.c
index 9f497a0..0eb2be1 100644
--- a/Geigerzaehler/main.c
+++ b/Geigerzaehler/main.c
@@ -20,7 +20,7 @@ uint16_t boost_frequency = 2000;		// 2kHz frequency
 uint16_t signalOutput_time = 200;		// 200ms
 
 uint8_t boost_highVoltage_nextHigh	=	1;
-uint16_t boost_highVoltage_nextTick	=	0;
+uint16_t boost_highVoltage_nextTick	=	1;
 
 uint8_t signalOutput_nextHigh	=	1;
 uint16_t signalOutput_nextTick	=	0;
@@ -42,6 +42,7 @@ int main()
 	DDRD |= (1 << PORTD4);
 	DDRD |= (1 << PORTD5);
 	DDRD |= (1 << PORTD6);
+	DDRB |= (1 << PORTB5);	// Onboard-Led
 	
 	// Interrupt for INT0	Pin-D2	High-voltage check
     EICRA |= (0 << ISC01)|(1 << ISC00); // On at any edge		[Code: 01]
@@ -77,7 +78,7 @@ int main()
 				PORTD |= (0 << PORTD4);
 				boost_highVoltage_nextHigh = 1;	// Next is high
 			}
-
+			
 			// Calculate when next high/low should be set
 			boost_highVoltage_nextTick = (uint16_t)TCNT1 + F_CPU/timer1_prescaler * 1/(boost_frequency/2);		// Half of time it should be high/low
 			if(boost_highVoltage_nextTick == 0) boost_highVoltage_nextTick++;		// If its 0, it stops, we dont want that
@@ -159,12 +160,16 @@ ISR(INT0_vect)
 	{	
 		// Below ~400V, activate booster
 		boost_highVoltage_nextTick = 1;	//  Run as soon as possible
+		
+		PORTB |= (1 << PORTB5);	// Onboard-Led
 	}
 	else					// Rising edge
 	{
 		// Reached ~400V, deactivate booster
 		boost_highVoltage_nextTick = 0;
 		
+		PORTB |= (0 << PORTB5);	// Onboard-Led
+		
 		// reset state
 		PORTD |= (0 << PORTD4);			// pin on low
 		boost_highVoltage_nextHigh = 1;	// next is high