The first “Hello World!” project I prefer for Microcontroller is LED Blinking. I have used ATMEL’s 89C51 (40-pins DIP) 8051 architecture microcontroller which is ideal for first time learning MCU Chip. I used my previously made 5V Regulator to supply uninterrupted regulated DC voltage. The program is very simple and straight forward, that uses a delay procedure that loops for 255 x 256 = 65536 times and produce loop based software delay.
org 0000h loop: mov b, #0FFh acall delay clr p1.0 mov b, #0FFh acall delay mov p1, #0FFh ajmp loop delay: djnz acc, delay mov acc, #0FFh djnz b, delay ret end
goood project for learning
how do you connect the microcontroller with the pc.
hi.i interest about MCS-51.Your project LED Blinking by 8051 it very easy.
Thank you for example.maybe u have free time.
Thank You.
Good start!
goooooooooddd..
do you have an example to blinking 7 led sir?
i need a circuit and the source code also..
perhaps the source code is using keil uversion and 8051 microcontroller..
Hi there. I have a simple project for school. I need to connect a 8051 to a 7 segment lcd and to make a counter. Basically once every 2 seconds the display should increment with i(where i is a value that can be set from the assembly code). When it reaches 10 it should overflow and start over.
I need to simulate this in proteus.
Please help me. I will be forever grateful.
But how do you program the 8051? serial or ISP?? please give the programming circuit sir…..thank you…..
Good for beginners.
sir
is this possilbe to connect led + terminal to the mcu and – to the gnd
will the mcu draw enough couurent to blink the led
HI Sajiv
this is good for beginers ,good job
check out this blog for 8051 usb programmer schematic
http://microembeded.blogspot.com/2011/06/usb-8051-avr-microcontroller-programmer.html
@Gaurav Singh: You can do it too, but add a current limiting resistor in series to make sure the current through the LED doesn’t go above 25-30mA.
sir please tell me why led is blinking on clear and off when set…???why??plz answer me m so confused
@Daljit: Simple math. Do you see the right side (+) of the LED is connected to VCC (+5V)? Now if you ground (0V) the other side, LED will lit.