diff --git a/headers/adc.h b/headers/adc.h
index 7a11906..09ba4fd 100644
--- a/headers/adc.h
+++ b/headers/adc.h
@@ -12,4 +12,14 @@
 									 (value) == 128 ? (1<<ADPS2 | 1<<ADPS1 | 1<<ADPS0) : \
 													  (0<<ADPS2 | 0<<ADPS1 | 0<<ADPS0))
 
+// Table 24-6 : ADC Auto Trigger Source Selections
+#define ADC_TRIGGER_FREE_RUNNING				(0 << ADTS2) | (0 << ADTS1) | (0 << ADTS0)
+#define ADC_TRIGGER_ANALOG_COMPARE				(0 << ADTS2) | (0 << ADTS1) | (1 << ADTS0)
+#define ADC_TRIGGER_EXTERNAL_INTERRUPT_0		(0 << ADTS2) | (1 << ADTS1) | (0 << ADTS0)
+#define ADC_TRIGGER_TIMER_0_COMPARE_A			(0 << ADTS2) | (1 << ADTS1) | (1 << ADTS0)
+#define ADC_TRIGGER_TIMER_0_OVERFLOW			(1 << ADTS2) | (0 << ADTS1) | (0 << ADTS0)
+#define ADC_TRIGGER_TIMER_1_COMPARE_B			(1 << ADTS2) | (0 << ADTS1) | (1 << ADTS0)
+#define ADC_TRIGGER_TIMER_1_OVERFLOW			(1 << ADTS2) | (1 << ADTS1) | (0 << ADTS0)
+#define ADC_TRIGGER_TIMER_1_CAPTURE_EVENT		(1 << ADTS2) | (1 << ADTS1) | (1 << ADTS0)
+
 #endif // ADC_H
\ No newline at end of file
diff --git a/module05/ex00/adc.c b/module05/ex00/adc.c
index fee381c..5cfda5a 100644
--- a/module05/ex00/adc.c
+++ b/module05/ex00/adc.c
@@ -1,14 +1,6 @@
 #include "header.h"
 
-// Table 14-6. Port C Pins Alternate Functions
-// - PC0 -> ADC0 (ADC Input Channel 0)
-//       -> PCINT8 (Pin Change Interrupt 8)
-//
 // 24.2 : The ADC generates a 10-bit result which is presented in the ADC Data Registers, ADCH and ADCL
-//
-// START A CONVERSTION in single conversion mode :
-// - disabling the Power Reduction ADC bit, PRADC
-// - writing a logical one to the ADC Start Conversion bit, ADSC
 
 void adc_init(uint8_t prescaler_value) {
     ADMUX = (1 << REFS0);									// Table 24-3 : set voltage reference, AVCC with external capacitor at AREF pin
diff --git a/module05/ex00/header.h b/module05/ex00/header.h
index c58a847..810b00f 100644
--- a/module05/ex00/header.h
+++ b/module05/ex00/header.h
@@ -12,6 +12,11 @@
 #include "usart.h"
 #include "adc.h"
 
+//
+// GLOBAL
+//
+extern volatile uint8_t adc_channel;
+
 //
 // PROTOTYPES
 //
diff --git a/module05/ex00/main.c b/module05/ex00/main.c
index 01ca708..dbc21c5 100644
--- a/module05/ex00/main.c
+++ b/module05/ex00/main.c
@@ -16,20 +16,14 @@
 
 volatile uint8_t adc_channel = 0;
 
-// description
+// read potentiometer value and print it in uart as hexadecimal 2-number
 int main() {
     char buffer[4];
 	SREG |= ENABLE_GLOBAL_INTERRUPT;											// 7.3.1 : Status Register, bit 7 : I – Global Interrupt Enable
 	uart_init();
 	adc_init(ADC_PRESCALER);
 
-	while(1) {
-        uint16_t value = adc_read(0);											// Read from ADC0 (A0)
-		int_to_hex_string(value, buffer, 2);
-        uart_printstr_endl(buffer);
-        _delay_ms(20);															// Wait 20ms
-	}
-}
+	timer_1B_init();
 
-// ISR(ADC_vect) {		// Table 12-6 : interrupt vector for ADC Conversion Complete
-// }
\ No newline at end of file
+	while(1);
+}
\ No newline at end of file
diff --git a/module05/ex00/math.c b/module05/ex00/math.c
new file mode 100644
index 0000000..0177fc0
--- /dev/null
+++ b/module05/ex00/math.c
@@ -0,0 +1,9 @@
+#include "header.h"
+
+void int_to_hex_string(uint64_t value, char *out, uint8_t num_digits) {				// num_digits : number of digit of the output, ex 2 for 3FF (1023) -> FF
+    for (uint8_t i = 0; i < num_digits; ++i) {
+        uint8_t shift = (num_digits - 1 - i) * 4;
+        out[i] = INT_TO_HEX_CHAR((value >> shift) & 0x0F);
+    }
+    out[num_digits] = '\0';
+}
\ No newline at end of file
diff --git a/module05/ex01/header.h b/module05/ex01/header.h
index c58a847..810b00f 100644
--- a/module05/ex01/header.h
+++ b/module05/ex01/header.h
@@ -12,6 +12,11 @@
 #include "usart.h"
 #include "adc.h"
 
+//
+// GLOBAL
+//
+extern volatile uint8_t adc_channel;
+
 //
 // PROTOTYPES
 //
diff --git a/module05/ex01/main.c b/module05/ex01/main.c
index 3a8d080..70a8c46 100644
--- a/module05/ex01/main.c
+++ b/module05/ex01/main.c
@@ -26,4 +26,4 @@ int main() {
 	timer_1B_init();
 
 	while(1);
-}
+}
\ No newline at end of file
diff --git a/module05/ex01/math.c b/module05/ex01/math.c
new file mode 100644
index 0000000..0177fc0
--- /dev/null
+++ b/module05/ex01/math.c
@@ -0,0 +1,9 @@
+#include "header.h"
+
+void int_to_hex_string(uint64_t value, char *out, uint8_t num_digits) {				// num_digits : number of digit of the output, ex 2 for 3FF (1023) -> FF
+    for (uint8_t i = 0; i < num_digits; ++i) {
+        uint8_t shift = (num_digits - 1 - i) * 4;
+        out[i] = INT_TO_HEX_CHAR((value >> shift) & 0x0F);
+    }
+    out[num_digits] = '\0';
+}
\ No newline at end of file
diff --git a/module05/ex02/adc.c b/module05/ex02/adc.c
index 859edb0..780e11b 100644
--- a/module05/ex02/adc.c
+++ b/module05/ex02/adc.c
@@ -21,9 +21,9 @@ uint16_t calibrate_temperature(uint16_t value, uint8_t speed) {		// 24.8 : Tempe
 }
 
 void adc_print_dec(uint16_t value) {
-	if (adc_channel == ADC_THERMISTOR) {
-		value = calibrate_temperature(value, 5);
-	}
+	// if (adc_channel == ADC_THERMISTOR) {
+	// 	value = calibrate_temperature(value, 5);
+	// }
 	char buffer[17] = {0};
 	uint16_to_string(value, buffer);
 	uart_printstr(buffer);