diff --git a/TWI/TWI/KS0066.cpp b/TWI/TWI/KS0066.cpp
new file mode 100644
index 0000000..b01d355
--- /dev/null
+++ b/TWI/TWI/KS0066.cpp
@@ -0,0 +1,227 @@
+#include "KS0066.h"
+
+#include <util/delay.h>
+
+KS0066::KS0066()
+{
+
+}
+
+KS0066::KS0066(ShiftRegister &shiftRegister)
+{
+	setShiftRegister(shiftRegister);
+}
+
+void KS0066::setShiftRegister(ShiftRegister &shiftRegister)
+{
+	m_shiftRegister = &shiftRegister;
+
+	initDisplay();
+}
+
+void KS0066::initDisplay()
+{
+	_delay_ms(30);
+
+	execute((1 << m_db5) | 1 << m_db4);
+	_delay_ms(5);
+	execute((1 << m_db5) | 1 << m_db4);
+	_delay_us(100);
+	execute((1 << m_db5) | 1 << m_db4);
+	execute((1 << m_db5));
+
+	functionSet(false, true, true);
+
+	onOffControl(true, false, false);
+	displayClear();
+
+	entryMode(true, false);
+
+	sendString("ready.");
+}
+
+void KS0066::functionSet(bool interface8bit, bool twoLine, bool displayFont)
+{
+	uint8_t command = 0b00100000;
+
+	if (interface8bit)
+	{
+		command |= (1 << 4);
+	}
+
+	if (twoLine)
+	{
+		command |= (1 << 3);
+	}
+
+	if (displayFont)
+	{
+		command |= (1 << 2);
+	}
+
+	sendCommand(command);
+
+	_delay_us(53);
+}
+
+void KS0066::onOffControl(bool displayOn, bool cursorOn, bool blinkingOn)
+{
+	uint8_t command = 0b00001000;
+
+	if (displayOn)
+	{
+		command |= (1 << 2);
+	}
+
+	if (cursorOn)
+	{
+		command |= (1 << 1);
+	}
+
+	if (blinkingOn)
+	{
+		command |= (1 << 0);
+	}
+
+	sendCommand(command);
+
+	_delay_us(53);
+}
+
+void KS0066::displayClear()
+{
+	uint8_t command = 0b00000001;
+
+	sendCommand(command);
+
+	_delay_ms(2.16);
+}
+
+void KS0066::entryMode(bool incrementMode, bool entireShift)
+{
+	uint8_t command = 0b00000100;
+
+	if (incrementMode)
+	{
+		command |= (1 << 1);
+	}
+
+	if (entireShift)
+	{
+		command |= (1 << 0);
+	}
+
+	sendCommand(command);
+
+	_delay_us(53);
+}
+
+void KS0066::setCursorPos(uint8_t line, uint8_t column)
+{
+	sendCommand(0b10000000 + column + (line * 40));
+}
+
+void KS0066::sendCommand(uint8_t data)
+{
+	sendByte(data, true);
+}
+
+void KS0066::sendChar(char c)
+{
+	sendByte(c, false);
+
+	_delay_us(53);
+}
+
+void KS0066::sendString(const char *string)
+{
+	uint8_t count = 0;
+	while (string != nullptr && *string != 0 && count < (m_lines * m_columns))
+	{
+		if (count % m_columns == 0)
+		{
+			setCursorPos(count / m_columns, 0);
+		}
+		sendChar(*string);
+		string++;
+		count++;
+	}
+}
+
+void KS0066::sendByte(uint8_t data, bool isCommand)
+{
+	uint8_t registerValue = 0;
+
+	if (!isCommand)
+	{
+		registerValue |= (1 << m_rs);
+	}
+
+	if (data & (1 << 7))
+	{
+		registerValue |= (1 << m_db7);
+	}
+
+	if (data & (1 << 6))
+	{
+		registerValue |= (1 << m_db6);
+	}
+
+	if (data & (1 << 5))
+	{
+		registerValue |= (1 << m_db5);
+	}
+
+	if (data & (1 << 4))
+	{
+		registerValue |= (1 << m_db4);
+	}
+
+	execute(registerValue);
+
+	registerValue &= (1 << m_rs);
+
+	if (data & (1 << 3))
+	{
+		registerValue |= (1 << m_db7);
+	}
+
+	if (data & (1 << 2))
+	{
+		registerValue |= (1 << m_db6);
+	}
+
+	if (data & (1 << 1))
+	{
+		registerValue |= (1 << m_db5);
+	}
+
+	if (data & (1 << 0))
+	{
+		registerValue |= (1 << m_db4);
+	}
+
+	execute(registerValue);
+}
+
+void KS0066::execute(uint8_t registerValue)
+{
+	registerValue |= (1 << m_e);
+	m_shiftRegister->output(registerValue);
+	_delay_us(2);
+
+	registerValue &= ~(1 << m_e);
+	m_shiftRegister->output(registerValue);
+}
+
+void KS0066::set(const char *string)
+{
+	displayClear();
+	sendString(string);
+}
+
+void KS0066::clear()
+{
+	displayClear();
+}
+
diff --git a/TWI/TWI/KS0066.h b/TWI/TWI/KS0066.h
new file mode 100644
index 0000000..87f98dc
--- /dev/null
+++ b/TWI/TWI/KS0066.h
@@ -0,0 +1,55 @@
+#pragma once
+
+#include "environment.h"
+
+#include <avr/io.h>
+
+#include "ShiftRegister.h"
+
+class KS0066
+{
+private:
+	ShiftRegister *m_shiftRegister;
+
+	static const uint8_t m_rs = 1;
+	static const uint8_t m_rw = 2;
+	static const uint8_t m_e = 3;
+	static const uint8_t m_db4 = 4;
+	static const uint8_t m_db5 = 5;
+	static const uint8_t m_db6 = 6;
+	static const uint8_t m_db7 = 7;
+
+	uint8_t m_lines = 2;
+	uint8_t m_columns = 16;
+
+public:
+	KS0066();
+	KS0066(ShiftRegister &shiftRegister);
+
+	void setShiftRegister(ShiftRegister &shiftRegister);
+
+	void clear();
+
+	void set(const char *string);
+
+
+private:
+
+	void initDisplay();
+
+	void functionSet(bool interface8bit, bool twoLine, bool displayOn);
+	void onOffControl(bool displayOn, bool cursorOn, bool blinkingOn);
+	void entryMode(bool incrementMode, bool entireShift);
+	void displayClear();
+
+	void setCursorPos(uint8_t line, uint8_t column);
+
+	void sendCommand(uint8_t data);
+
+	void sendChar(char c);
+	void sendString(const char *string);
+
+	void sendByte(uint8_t data, bool isCommand);
+
+	void execute(uint8_t registerValue);
+};
\ No newline at end of file
diff --git a/TWI/TWI/ShiftRegister.cpp b/TWI/TWI/ShiftRegister.cpp
new file mode 100644
index 0000000..75e22bf
--- /dev/null
+++ b/TWI/TWI/ShiftRegister.cpp
@@ -0,0 +1,23 @@
+#include "ShiftRegister.h"
+
+ShiftRegister::ShiftRegister(volatile uint8_t *shiftClockPort, uint8_t shiftClockPin,
+                             volatile uint8_t *dataPort, uint8_t dataPin,
+                             volatile uint8_t *latchClockPort, uint8_t latchClockPin)
+	: m_shiftClockPin(shiftClockPort, shiftClockPin)
+	, m_dataPin(dataPort, dataPin)
+	, m_latchClockPin(latchClockPort, latchClockPin)
+{
+
+}
+
+void ShiftRegister::output(int8_t value)
+{
+	for (int8_t bitIdx = 7; bitIdx >= 0; --bitIdx)
+	{
+		m_dataPin.set(value & (1 << bitIdx));
+		m_shiftClockPin.pulse();
+	}
+
+	m_latchClockPin.pulse();
+}
+
diff --git a/TWI/TWI/ShiftRegister.h b/TWI/TWI/ShiftRegister.h
new file mode 100644
index 0000000..a2b2e4d
--- /dev/null
+++ b/TWI/TWI/ShiftRegister.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#include <avr/io.h>
+
+#include "Pin.h"
+
+class ShiftRegister
+{
+	Pin m_shiftClockPin;
+	Pin m_dataPin;
+	Pin m_latchClockPin;
+
+public:
+	ShiftRegister(volatile uint8_t *shiftClockPort, uint8_t shiftClockPin,
+	              volatile uint8_t *dataPort, uint8_t dataPin,
+	              volatile uint8_t *latchClockPort, uint8_t latchClockPin);
+
+	void output(int8_t value);
+};
diff --git a/TWI/TWI/TWI.cpp b/TWI/TWI/TWI.cpp
index dc0c91e..8e446c9 100644
--- a/TWI/TWI/TWI.cpp
+++ b/TWI/TWI/TWI.cpp
@@ -7,6 +7,8 @@
 #include <util/twi.h>
 
 #include "Pin.h"
+#include "ShiftRegister.h"
+#include "KS0066.h"
 
 void I2C_init(uint8_t address)
 {
@@ -23,7 +25,9 @@ void I2C_stop(void)
 	TWCR &= ~( (1<<TWEA) | (1<<TWEN) );
 }
 
-volatile uint8_t dataBuffer;
+char displayBuffer[32];
+volatile uint8_t displayBufferIdx = 0;
+volatile bool writeDisplay = false;
 
 ISR(TWI_vect)
 {
@@ -34,12 +38,12 @@ ISR(TWI_vect)
 		TWCR |= (1<<TWIE) | (1<<TWINT) | (1<<TWEA) | (1<<TWEN);
 		break;
 	case TW_SR_DATA_ACK:
-		dataBuffer = TWDR;
+		displayBuffer[displayBufferIdx++] = TWDR;
 		TWCR |= (1<<TWIE) | (1<<TWINT) | (1<<TWEA) | (1<<TWEN);
 		break;
-	case TW_ST_SLA_ACK:
-		TWDR = dataBuffer + 1;
-		TWCR |= (1<<TWIE) | (1<<TWINT) | (0<<TWEA) | (1<<TWEN);
+	case TW_SR_STOP:
+		writeDisplay = true;
+		TWCR |= (1<<TWIE) | (1<<TWEA) | (1<<TWEN);
 		break;
 	default:
 		// if none of the above apply prepare TWI to be addressed again
@@ -50,14 +54,42 @@ ISR(TWI_vect)
 int main(void)
 {
 	DDRD |= (1 << PD6);
+	DDRC |= (1 << PC4) | (1 << PC3) | (1 << PC2);
 
 	Pin statusLed(&PORTD, PD6);
 	statusLed.set(false);
 
+	DDRD |= (1 << PD5);
+	TCCR1A = (1<<WGM10) | (1<<COM1A1); // PWM, phase correct, 8 bit.
+	TCCR1B = (1<<CS11) | (1<<CS10); // Prescaler 64 = Enable counter
+	OCR1A = 0;
+
+	DDRD &= ~(1 << PD3);
+	PORTD |= (1 << PD3);
+
+	ShiftRegister shiftRegister(&PORTC, PC4, &PORTC, PC2, &PORTC, PC3);
+
+	KS0066 lcd(shiftRegister);
+
+	statusLed.set(true);
+
 	I2C_init(0x23);
 	sei();
 
 	while(1)
 	{
+		if (writeDisplay == true)
+		{
+			displayBuffer[displayBufferIdx] = 0;
+			lcd.set(displayBuffer);
+			writeDisplay = false;
+			displayBufferIdx = 0;
+		}
+
+		if (!(PIND & (1 << PD3)))
+		{
+			OCR1A = ((OCR1A + 1) * 2) % 255;
+			_delay_ms(300);
+		}
 	}
 }
\ No newline at end of file
diff --git a/TWI/TWI/TWI.cppproj b/TWI/TWI/TWI.cppproj
index a03f7be..2df5f52 100644
--- a/TWI/TWI/TWI.cppproj
+++ b/TWI/TWI/TWI.cppproj
@@ -56,92 +56,82 @@
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     </ToolchainSettings>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="environment.h">
       <SubType>compile</SubType>
     </Compile>
+    <Compile Include="KS0066.cpp">
+      <SubType>compile</SubType>
+    </Compile>
+    <Compile Include="KS0066.h">
+      <SubType>compile</SubType>
+    </Compile>
     <Compile Include="Pin.cpp">
       <SubType>compile</SubType>
     </Compile>
     <Compile Include="Pin.h">
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+    <Compile Include="ShiftRegister.cpp">
+      <SubType>compile</SubType>
+    </Compile>
+    <Compile Include="ShiftRegister.h">
+      <SubType>compile</SubType>
+    </Compile>
     <Compile Include="TWI.cpp">
       <SubType>compile</SubType>
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