diff --git a/main.c b/main.c
index 242e00f..06931f5 100644
--- a/main.c
+++ b/main.c
@@ -57,8 +57,8 @@ volatile bool photoresistor_flag = false; /**< flag set when ambient luminosity
  *  @note I have to use type variables because defines would be stored in signed integers, leading to an overflow it later calculations
  *  @{
  */
-/** the number of ticks in one second (depend on the number of LED since it tries to have 255 tick per LED per second) */
-#define TICKS_PER_SECOND 256*WS2812B_LEDS/60
+/** the number of ticks in one second (a powe or 2 > 256*WS2812B_LEDS/60) */
+#define TICKS_PER_SECOND 256
 /** number of ticks in one second */
 const uint32_t ticks_second = TICKS_PER_SECOND;
 /** number of ticks in one minute */
@@ -371,7 +371,7 @@ int main(void)
 #endif
 
 	// setup RTC
-	rtc_auto_awake(RCC_LSE, 32768/ticks_second-1); // ensure RTC is on, uses the 32.678 kHz LSE, and the prescale is set to our tick speed, else update backup registers accordingly
+	rtc_auto_awake(RCC_LSE, 32768/ticks_second-1); // ensure RTC is on, uses the 32.678 kHz LSE, and the prescale is set to our tick speed, else update backup registers accordingly (power off the micro-controller for the change to take effect)
 	rtc_interrupt_enable(RTC_SEC); // enable RTC interrupt on "seconds"
 	nvic_enable_irq(NVIC_RTC_IRQ); // allow the RTC to interrupt
 
@@ -502,7 +502,6 @@ int main(void)
 				adc_start_conversion_regular(ADC1); // start measuring ambient luminosity
 			}
 			if ((rtc_get_counter_val()%ticks_second)==0) { // one second passed
-				//printf("ticks: %lu\n", rtc_get_counter_val());
 				led_toggle(); // LED activity to show we are not stuck
 			}
 			if ((rtc_get_counter_val()%ticks_minute)==0) { // one minute passed