Microcomputer-ATmega128

Outline

1. LED on-off	Detail report
2. Switch debouncing	Detail report
3. 7-Segment LED display	Detail report
4. Control motor velocity using PWM	Detail report
5. LCD display and print float type	Detail report
6. USART serial communication	Detail report
7. Rhythm game using Ultrasonic sensor	Detail report
8. Author	All Demo video

1. LED on-off

1. Just on/off LED
2. Using Interrupt for on/off LED
   

Full Demo video Link
See pdf file for details in folder 1-LED-on-off

2. Switch debouncing

Measure the phenomenon	Bounce

Debouncing

1. Using Delay - Software way
2. Using Capacior - Hardware way

Full Demo video Link
See pdf file for details in folder 2-Switch-debouncing

3. 7-Segment LED display

Schematic

7-Segment	Common Anode Type	S-5263ASR1

Transistor		MPS2907A

Full Demo video Link

See pdf file for details in folder 3-7-Segment-LED-display

4. Control motor velocity using PWM

Driving motor	Schematic for 7 Segment

Full Demo video Link

See pdf file for details in folder 4-Control-motor-velocity-using-PWM

5. LCD display and print float type

Schematic

Potentiometer	3362 Series (50k ohm) 3362P-1-503

Full Demo video Link

See pdf file for details in folder 5-LCD-display-and-print-float-type

6. USART serial communication

Full Demo video Link

See pdf file for details in folder 6-USART-serial-communication

7. Rhythm game using Ultrasonic sensor

Schematic using OrCAD

Ultrasonic sensor datasheet

HC-SR04	electric parameter

driving ultrasonic sensor

1. Input 10us length pulse through TRIGGER pin
2. The sensor transmits ultrasonic waves toward the front
3. Calculate the length of time that the ultrasonic wave reflected by the object
4. The ECHO pin outputs a pulse proportional to the length of time.

Full Demo video Link

See pdf file for details in folder 7-Rhythm-game-using-Ultrasonic-sensor

8. Author

Nanhee Kim / @nh9k / PersonalBlog