8051 Microcontroller

PWM: motor speed control

speed of motor depends on voltage. using this property we can vary the speed of dc motor. although voltage is fixed but variation can be possible by giving duty cycle pulse i.e wider the on period of pulse,higher the speed we'll get. we can provide different duty cycle pulses using software.

pulse counter

pulse counter is used in many application, you can see visitor counter installed at the entry and exit of mall,theater etc and many times in a factory for production measurement and control.pulse counter that i have designed is based on Atmel AT89C4051 micro-controller operated at 11.0592 MHZ frequency.

LCD:creating custom character

this tutorial gives you best explanation of displaying any character on 16*2 lcd on 5*8 pixel irrespective of ASCII value. almost all lcds have HD44780U controller built in them. it is recommended to read this article prior to proceed further. lcd has CGRAM where we can write for custom character and then can easily be extracted to display on lcd

PROTEUS DESIGN

lcd interfacing with 8051

this article make you learn how to interface LCD(Liquid Crystal Display) with 8051 micro-controller. LCD has wide advantages in real world application. it is an important output device to keep track all automated and semi-automated devices. in all LCDs we are using 16*2 which is very common module generally used by a novice .

PROTEUS DESIGN

keypad based seven segment display

the article is build around seven segment and keypad. the circuit takes input from keypad and display variable number on the screen.

8051 Microcontroller