diff --git a/inc/main.h b/inc/main.h
new file mode 100644
index 0000000..6f6ffa2
--- /dev/null
+++ b/inc/main.h
@@ -0,0 +1,132 @@
+/**
+ * @brief The Main program header.
+ * @details this file contains the prototypes and structs.
+ * @author Jake Goodwin
+ * @date 2025
+ * @copyright None
+ * @file main.h
+ */
+
+#ifndef MAIN_H
+#define MAIN_H
+
+
+#include <avr/io.h>
+
+//#############################
+//Defines
+//#############################
+
+#ifndef UINT8_MAX
+#define UINT8_MAX 256
+#endif
+
+
+//This is the bitpattern that should be at address 0x00
+#define START_PATTERN 0xAA
+#define END_PATTERN 0x55
+
+//Addresses in the eeprom for the two bypasses
+#define ROM_SP_ADR      0x0
+#define ROM_BP1_ADR     0x1
+#define ROM_BP2_ADR     0x2
+#define ROM_EP_ADR      0x3
+
+//Debounce check number.
+#define MAX_CHECKS 10
+
+#define LED_PORT (1<<5) 
+#define LED_PIN PB5
+#define BLINK_DELAY_MS 5000
+
+#define PWM_PIN1 PB0  // Pin 5 - Motor PWM 1
+#define PWM_PIN2 PB1  // Pin 6 - Motor PWM 2
+#define ADC_PIN PB3   // Pin 2 - Fader position reading
+#define BUTTON_PIN PB4 // Pin 3 - Button input
+
+
+/*The timing of "ticks" is dependent on the AVR timer's counter register
+ * so for an 8bit register the maximum value is 256. Given we stick with
+ * a 1Mhz cpu frequency can use this formula to calculate the number of
+ * interrupts(timer overflows) per second:
+ *
+ * OVF_S = (F_CPU / DIV)/ (2^8)
+ * 61 = (1000000 / 64) / 256
+ *
+ * This is important because the ATiny13/A only have a single timer built into
+ * them.
+ *
+ * Ticks are used as our way of keep track of long button presses.
+ * */
+//original sent had 60
+#define LONG_PRESS_TICKS 66
+
+// Define DISABLE_TEMPORARY_SWITCH to turn off the ability to hold
+// the switch to temporarily engage/bypass.
+//#define DISABLE_TEMPORARY_SWITCH
+
+#define PIN_SW1     PINB2
+#define PIN_ACTIVE1 PB1
+#define PIN_MUTE    PB0
+
+
+//#############################
+//Typedefs & sttructs
+//#############################
+
+/*A structure to hold the button info*/
+typedef struct {
+    uint8_t is_pressed: 1;
+    uint8_t is_long_pressed: 1;
+    uint8_t is_bypassed: 1;
+    uint8_t timer_enabled: 1;
+    uint8_t pressed_ticks;
+    uint8_t input_pin;
+    uint8_t output_pin;
+}btn_state; 
+
+
+//#############################
+//Public Prototypes
+//#############################
+
+/**
+ * @brief Blinks a defined led pin.
+ * @param None
+ */
+void led_blink(void);
+
+
+
+/**
+ * @brief Initializes the uC for the program. 
+ */
+void init_prog(void);
+
+
+/**
+ * @brief Reads the ADC pin
+ * @param
+ */
+uint16_t readADC(void);
+
+/**
+ * @brief
+ * @param
+ */
+void motorCoast(void);
+
+/**
+ * @brief
+ * @param
+ */
+void motorMove(int direction);
+
+/**
+ * @brief
+ * @param
+ */
+uint8_t readButton(void);
+
+
+#endif