diff --git a/Powercore-V2.0 Firmware/main.c b/Powercore-V2.0 Firmware/main.c
index 8ac8b66..9f2c9d5 100644
--- a/Powercore-V2.0 Firmware/main.c	
+++ b/Powercore-V2.0 Firmware/main.c	
@@ -12,7 +12,7 @@
 //OUTPUT PULSE PARAMETERS (times in usecs)
 #define OUTPUT_ON_TIME 20
 #define OUTPUT_OFF_TIME 70
-#define ISO_PULSE false
+#define ISO_PULSE true
 #define CAP_VOLTAGE_SETPOINT 65
 
 //CC Charger Parameters (don't change unless you know what you're doing)
diff --git a/Powercore-V2.0 Firmware/pulse_generator.c b/Powercore-V2.0 Firmware/pulse_generator.c
index bed73e2..fd10c9e 100644
--- a/Powercore-V2.0 Firmware/pulse_generator.c	
+++ b/Powercore-V2.0 Firmware/pulse_generator.c	
@@ -37,8 +37,6 @@ alarm_id_t timeout_alarm_id;
 uint32_t pulse_history[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 uint32_t pulse_counter = 0;
 
-bool tracker = false;
-
 //Prototype functions
 int64_t begin_off_time(alarm_id_t id, void *user_data);
 
@@ -158,7 +156,7 @@ int64_t begin_off_time(alarm_id_t id, void *user_data){
 
 }
 
-int64_t first_off_time(){
+void first_off_time(){
 
     gpio_put(OUTPUT_EN_PIN, false);                                                 //Turn off output MOSFET