diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3cc5847
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+*.elf
+*.hex
+*.o
+*.map
diff --git a/led2/Makefile b/led2/Makefile
new file mode 100644
index 0000000..3d9e544
--- /dev/null
+++ b/led2/Makefile
@@ -0,0 +1,196 @@
+
+##########------------------------------------------------------##########
+##########              Project-specific Details                ##########
+##########    Check these every time you start a new project    ##########
+##########------------------------------------------------------##########
+
+MCU   = atmega168p
+F_CPU = 1000000UL  
+BAUD  = 9600UL
+## Also try BAUD = 19200 or 38400 if you're feeling lucky.
+
+## A directory for common include files and the simple USART library.
+## If you move either the current folder or the Library folder, you'll 
+##  need to change this path to match.
+LIBDIR = ../../AVR-Programming-Library
+
+##########------------------------------------------------------##########
+##########                 Programmer Defaults                  ##########
+##########          Set up once, then forget about it           ##########
+##########        (Can override.  See bottom of file.)          ##########
+##########------------------------------------------------------##########
+
+PROGRAMMER_TYPE = usbtiny
+# extra arguments to avrdude: baud rate, chip type, -F flag, etc.
+PROGRAMMER_ARGS = 	
+
+##########------------------------------------------------------##########
+##########                  Program Locations                   ##########
+##########     Won't need to change if they're in your PATH     ##########
+##########------------------------------------------------------##########
+
+CC = avr-gcc
+OBJCOPY = avr-objcopy
+OBJDUMP = avr-objdump
+AVRSIZE = avr-size
+AVRDUDE = avrdude
+
+##########------------------------------------------------------##########
+##########                   Makefile Magic!                    ##########
+##########         Summary:                                     ##########
+##########             We want a .hex file                      ##########
+##########        Compile source files into .elf                ##########
+##########        Convert .elf file into .hex                   ##########
+##########        You shouldn't need to edit below.             ##########
+##########------------------------------------------------------##########
+
+## The name of your project (without the .c)
+# TARGET = blinkLED
+## Or name it automatically after the enclosing directory
+TARGET = $(lastword $(subst /, ,$(CURDIR)))
+
+# Object files: will find all .c/.h files in current directory
+#  and in LIBDIR.  If you have any other (sub-)directories with code,
+#  you can add them in to SOURCES below in the wildcard statement.
+SOURCES=$(wildcard *.c $(LIBDIR)/*.c)
+OBJECTS=$(SOURCES:.c=.o)
+HEADERS=$(SOURCES:.c=.h)
+
+## Compilation options, type man avr-gcc if you're curious.
+CPPFLAGS = -DF_CPU=$(F_CPU) -DBAUD=$(BAUD) -I. -I$(LIBDIR)
+CFLAGS = -Os -g -std=gnu99 -Wall
+## Use short (8-bit) data types 
+CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums 
+## Splits up object files per function
+CFLAGS += -ffunction-sections -fdata-sections 
+LDFLAGS = -Wl,-Map,$(TARGET).map 
+## Optional, but often ends up with smaller code
+LDFLAGS += -Wl,--gc-sections 
+## Relax shrinks code even more, but makes disassembly messy
+## LDFLAGS += -Wl,--relax
+## LDFLAGS += -Wl,-u,vfprintf -lprintf_flt -lm  ## for floating-point printf
+## LDFLAGS += -Wl,-u,vfprintf -lprintf_min      ## for smaller printf
+TARGET_ARCH = -mmcu=$(MCU)
+
+## Explicit pattern rules:
+##  To make .o files from .c files 
+%.o: %.c $(HEADERS) Makefile
+	 $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -o $@ $<;
+
+$(TARGET).elf: $(OBJECTS)
+	$(CC) $(LDFLAGS) $(TARGET_ARCH) $^ $(LDLIBS) -o $@
+
+%.hex: %.elf
+	 $(OBJCOPY) -j .text -j .data -O ihex $< $@
+
+%.eeprom: %.elf
+	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@ 
+
+%.lst: %.elf
+	$(OBJDUMP) -S $< > $@
+
+## These targets don't have files named after them
+.PHONY: all disassemble disasm eeprom size clean squeaky_clean flash fuses
+
+all: $(TARGET).hex 
+
+debug:
+	@echo
+	@echo "Source files:"   $(SOURCES)
+	@echo "MCU, F_CPU, BAUD:"  $(MCU), $(F_CPU), $(BAUD)
+	@echo	
+
+# Optionally create listing file from .elf
+# This creates approximate assembly-language equivalent of your code.
+# Useful for debugging time-sensitive bits, 
+# or making sure the compiler does what you want.
+disassemble: $(TARGET).lst
+
+disasm: disassemble
+
+# Optionally show how big the resulting program is 
+size:  $(TARGET).elf
+	$(AVRSIZE) -C --mcu=$(MCU) $(TARGET).elf
+
+clean:
+	rm -f $(TARGET).elf $(TARGET).hex $(TARGET).obj \
+	$(TARGET).o $(TARGET).d $(TARGET).eep $(TARGET).lst \
+	$(TARGET).lss $(TARGET).sym $(TARGET).map $(TARGET)~ \
+	$(TARGET).eeprom
+
+squeaky_clean:
+	rm -f *.elf *.hex *.obj *.o *.d *.eep *.lst *.lss *.sym *.map *~ *.eeprom
+
+##########------------------------------------------------------##########
+##########              Programmer-specific details             ##########
+##########           Flashing code to AVR using avrdude         ##########
+##########------------------------------------------------------##########
+
+flash: $(TARGET).hex 
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U flash:w:$<
+
+## An alias
+program: flash
+
+flash_eeprom: $(TARGET).eeprom
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U eeprom:w:$<
+
+avrdude_terminal:
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nt
+
+## If you've got multiple programmers that you use, 
+## you can define them here so that it's easy to switch.
+## To invoke, use something like `make flash_arduinoISP`
+flash_usbtiny: PROGRAMMER_TYPE = usbtiny
+flash_usbtiny: PROGRAMMER_ARGS =  # USBTiny works with no further arguments
+flash_usbtiny: flash
+
+flash_usbasp: PROGRAMMER_TYPE = usbasp
+flash_usbasp: PROGRAMMER_ARGS =  # USBasp works with no further arguments
+flash_usbasp: flash
+
+flash_arduinoISP: PROGRAMMER_TYPE = avrisp
+flash_arduinoISP: PROGRAMMER_ARGS = -b 19200 -P /dev/ttyACM0 
+## (for windows) flash_arduinoISP: PROGRAMMER_ARGS = -b 19200 -P com5
+flash_arduinoISP: flash
+
+flash_109: PROGRAMMER_TYPE = avr109
+flash_109: PROGRAMMER_ARGS = -b 9600 -P /dev/ttyUSB0
+flash_109: flash
+
+##########------------------------------------------------------##########
+##########       Fuse settings and suitable defaults            ##########
+##########------------------------------------------------------##########
+
+## Mega 48, 88, 168, 328 default values
+LFUSE = 0x62
+HFUSE = 0xdf
+EFUSE = 0x00
+
+## Generic 
+FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m -U efuse:w:$(EFUSE):m 
+
+fuses: 
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) \
+	           $(PROGRAMMER_ARGS) $(FUSE_STRING)
+show_fuses:
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nv	
+
+## Called with no extra definitions, sets to defaults
+set_default_fuses:  FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m -U efuse:w:$(EFUSE):m 
+set_default_fuses:  fuses
+
+## Set the fuse byte for full-speed mode
+## Note: can also be set in firmware for modern chips
+set_fast_fuse: LFUSE = 0xE2
+set_fast_fuse: FUSE_STRING = -U lfuse:w:$(LFUSE):m 
+set_fast_fuse: fuses
+
+## Set the EESAVE fuse byte to preserve EEPROM across flashes
+set_eeprom_save_fuse: HFUSE = 0xD7
+set_eeprom_save_fuse: FUSE_STRING = -U hfuse:w:$(HFUSE):m
+set_eeprom_save_fuse: fuses
+
+## Clear the EESAVE fuse byte
+clear_eeprom_save_fuse: FUSE_STRING = -U hfuse:w:$(HFUSE):m
+clear_eeprom_save_fuse: fuses
diff --git a/led3/Makefile b/led3/Makefile
new file mode 100644
index 0000000..3d9e544
--- /dev/null
+++ b/led3/Makefile
@@ -0,0 +1,196 @@
+
+##########------------------------------------------------------##########
+##########              Project-specific Details                ##########
+##########    Check these every time you start a new project    ##########
+##########------------------------------------------------------##########
+
+MCU   = atmega168p
+F_CPU = 1000000UL  
+BAUD  = 9600UL
+## Also try BAUD = 19200 or 38400 if you're feeling lucky.
+
+## A directory for common include files and the simple USART library.
+## If you move either the current folder or the Library folder, you'll 
+##  need to change this path to match.
+LIBDIR = ../../AVR-Programming-Library
+
+##########------------------------------------------------------##########
+##########                 Programmer Defaults                  ##########
+##########          Set up once, then forget about it           ##########
+##########        (Can override.  See bottom of file.)          ##########
+##########------------------------------------------------------##########
+
+PROGRAMMER_TYPE = usbtiny
+# extra arguments to avrdude: baud rate, chip type, -F flag, etc.
+PROGRAMMER_ARGS = 	
+
+##########------------------------------------------------------##########
+##########                  Program Locations                   ##########
+##########     Won't need to change if they're in your PATH     ##########
+##########------------------------------------------------------##########
+
+CC = avr-gcc
+OBJCOPY = avr-objcopy
+OBJDUMP = avr-objdump
+AVRSIZE = avr-size
+AVRDUDE = avrdude
+
+##########------------------------------------------------------##########
+##########                   Makefile Magic!                    ##########
+##########         Summary:                                     ##########
+##########             We want a .hex file                      ##########
+##########        Compile source files into .elf                ##########
+##########        Convert .elf file into .hex                   ##########
+##########        You shouldn't need to edit below.             ##########
+##########------------------------------------------------------##########
+
+## The name of your project (without the .c)
+# TARGET = blinkLED
+## Or name it automatically after the enclosing directory
+TARGET = $(lastword $(subst /, ,$(CURDIR)))
+
+# Object files: will find all .c/.h files in current directory
+#  and in LIBDIR.  If you have any other (sub-)directories with code,
+#  you can add them in to SOURCES below in the wildcard statement.
+SOURCES=$(wildcard *.c $(LIBDIR)/*.c)
+OBJECTS=$(SOURCES:.c=.o)
+HEADERS=$(SOURCES:.c=.h)
+
+## Compilation options, type man avr-gcc if you're curious.
+CPPFLAGS = -DF_CPU=$(F_CPU) -DBAUD=$(BAUD) -I. -I$(LIBDIR)
+CFLAGS = -Os -g -std=gnu99 -Wall
+## Use short (8-bit) data types 
+CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums 
+## Splits up object files per function
+CFLAGS += -ffunction-sections -fdata-sections 
+LDFLAGS = -Wl,-Map,$(TARGET).map 
+## Optional, but often ends up with smaller code
+LDFLAGS += -Wl,--gc-sections 
+## Relax shrinks code even more, but makes disassembly messy
+## LDFLAGS += -Wl,--relax
+## LDFLAGS += -Wl,-u,vfprintf -lprintf_flt -lm  ## for floating-point printf
+## LDFLAGS += -Wl,-u,vfprintf -lprintf_min      ## for smaller printf
+TARGET_ARCH = -mmcu=$(MCU)
+
+## Explicit pattern rules:
+##  To make .o files from .c files 
+%.o: %.c $(HEADERS) Makefile
+	 $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -o $@ $<;
+
+$(TARGET).elf: $(OBJECTS)
+	$(CC) $(LDFLAGS) $(TARGET_ARCH) $^ $(LDLIBS) -o $@
+
+%.hex: %.elf
+	 $(OBJCOPY) -j .text -j .data -O ihex $< $@
+
+%.eeprom: %.elf
+	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@ 
+
+%.lst: %.elf
+	$(OBJDUMP) -S $< > $@
+
+## These targets don't have files named after them
+.PHONY: all disassemble disasm eeprom size clean squeaky_clean flash fuses
+
+all: $(TARGET).hex 
+
+debug:
+	@echo
+	@echo "Source files:"   $(SOURCES)
+	@echo "MCU, F_CPU, BAUD:"  $(MCU), $(F_CPU), $(BAUD)
+	@echo	
+
+# Optionally create listing file from .elf
+# This creates approximate assembly-language equivalent of your code.
+# Useful for debugging time-sensitive bits, 
+# or making sure the compiler does what you want.
+disassemble: $(TARGET).lst
+
+disasm: disassemble
+
+# Optionally show how big the resulting program is 
+size:  $(TARGET).elf
+	$(AVRSIZE) -C --mcu=$(MCU) $(TARGET).elf
+
+clean:
+	rm -f $(TARGET).elf $(TARGET).hex $(TARGET).obj \
+	$(TARGET).o $(TARGET).d $(TARGET).eep $(TARGET).lst \
+	$(TARGET).lss $(TARGET).sym $(TARGET).map $(TARGET)~ \
+	$(TARGET).eeprom
+
+squeaky_clean:
+	rm -f *.elf *.hex *.obj *.o *.d *.eep *.lst *.lss *.sym *.map *~ *.eeprom
+
+##########------------------------------------------------------##########
+##########              Programmer-specific details             ##########
+##########           Flashing code to AVR using avrdude         ##########
+##########------------------------------------------------------##########
+
+flash: $(TARGET).hex 
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U flash:w:$<
+
+## An alias
+program: flash
+
+flash_eeprom: $(TARGET).eeprom
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U eeprom:w:$<
+
+avrdude_terminal:
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nt
+
+## If you've got multiple programmers that you use, 
+## you can define them here so that it's easy to switch.
+## To invoke, use something like `make flash_arduinoISP`
+flash_usbtiny: PROGRAMMER_TYPE = usbtiny
+flash_usbtiny: PROGRAMMER_ARGS =  # USBTiny works with no further arguments
+flash_usbtiny: flash
+
+flash_usbasp: PROGRAMMER_TYPE = usbasp
+flash_usbasp: PROGRAMMER_ARGS =  # USBasp works with no further arguments
+flash_usbasp: flash
+
+flash_arduinoISP: PROGRAMMER_TYPE = avrisp
+flash_arduinoISP: PROGRAMMER_ARGS = -b 19200 -P /dev/ttyACM0 
+## (for windows) flash_arduinoISP: PROGRAMMER_ARGS = -b 19200 -P com5
+flash_arduinoISP: flash
+
+flash_109: PROGRAMMER_TYPE = avr109
+flash_109: PROGRAMMER_ARGS = -b 9600 -P /dev/ttyUSB0
+flash_109: flash
+
+##########------------------------------------------------------##########
+##########       Fuse settings and suitable defaults            ##########
+##########------------------------------------------------------##########
+
+## Mega 48, 88, 168, 328 default values
+LFUSE = 0x62
+HFUSE = 0xdf
+EFUSE = 0x00
+
+## Generic 
+FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m -U efuse:w:$(EFUSE):m 
+
+fuses: 
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) \
+	           $(PROGRAMMER_ARGS) $(FUSE_STRING)
+show_fuses:
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nv	
+
+## Called with no extra definitions, sets to defaults
+set_default_fuses:  FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m -U efuse:w:$(EFUSE):m 
+set_default_fuses:  fuses
+
+## Set the fuse byte for full-speed mode
+## Note: can also be set in firmware for modern chips
+set_fast_fuse: LFUSE = 0xE2
+set_fast_fuse: FUSE_STRING = -U lfuse:w:$(LFUSE):m 
+set_fast_fuse: fuses
+
+## Set the EESAVE fuse byte to preserve EEPROM across flashes
+set_eeprom_save_fuse: HFUSE = 0xD7
+set_eeprom_save_fuse: FUSE_STRING = -U hfuse:w:$(HFUSE):m
+set_eeprom_save_fuse: fuses
+
+## Clear the EESAVE fuse byte
+clear_eeprom_save_fuse: FUSE_STRING = -U hfuse:w:$(HFUSE):m
+clear_eeprom_save_fuse: fuses
diff --git a/led3/led3.c b/led3/led3.c
new file mode 100644
index 0000000..ff965bc
--- /dev/null
+++ b/led3/led3.c
@@ -0,0 +1,47 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <limits.h>
+
+#define DELAY 75
+#define LEN sizeof(PORTB) * CHAR_BIT
+#define LED_DDR DDRB
+#define LED_PORT PORTB
+
+void _delay_s(double __s)
+{
+    int i;
+    for (i = 0; i < __s; i++)
+        _delay_ms(1000);
+}
+
+int main(void) {
+    uint8_t i;
+
+    LED_DDR = 0xff;
+
+    for (;;) {
+        for (i = 0; i < LEN; i++) {
+            _delay_ms(DELAY);
+            LED_PORT |= (1 << i);
+        }
+        for (i = 0; i < LEN; i++) {
+            _delay_ms(DELAY);
+            LED_PORT &= ~(1 << i);
+        }
+
+        _delay_s(1);
+
+        for (i = LEN; i < 255; i--) {
+            _delay_ms(DELAY);
+            LED_PORT |= (1 << i);
+        }
+        for (i = LEN; i < 255; i--) {
+            _delay_ms(DELAY);
+            LED_PORT &= ~(1 << i);
+        }
+
+        _delay_s(1);
+    }
+
+    return 0;
+}