Comments on: 8051 Microcontroller port programming

By: Abhijith R Prasad

Abhijith R Prasad — Sat, 01 Mar 2014 05:47:02 +0000

Sir,
The project I am doing is digital tachometer with speed monitoring system using 8051.It accept the working speed limits as input( say 1000- 800,upper limit and lower limit). While entering(Using a keypad) the speeds they are displayed. Then from a magnetic sensor it accepts the speed as input and displays it.If the speed is over the limit(Say 1050)it give an LED alarm. If below the speed(say 700) then it gives another led alarm.Can I get source code for 8051 micro controller for this?????

By: Prabhakar G

Prabhakar G — Wed, 08 Jan 2014 17:15:41 +0000

Hello,

Could you please let me know in detail Y only port 0 is left without pull up resistors in 8051.

Also let me know in more detail, y we have to send only 0 to any port to configure as output and 1 to configure as input. may be explain in application point of view.

By: kishan

kishan — Mon, 16 Sep 2013 06:53:01 +0000

my project name is faster fingur first using microconroller

By: kishan

kishan — Mon, 16 Sep 2013 06:49:50 +0000

sir my project programiin is not founded so, plz help me

By: jeyasutha

jeyasutha — Thu, 15 Aug 2013 12:57:59 +0000

pls send me the simple basic program using micro controller

By: shankar

shankar — Fri, 19 Apr 2013 02:25:41 +0000

For the better understanding of PORT 0 and the concept of pull up register, check this out.
https://www.youtube.com/watch?v=t9bN-2nFNEs

By: montu patel

montu patel — Mon, 08 Apr 2013 10:57:47 +0000

Sir,
I am programming on at2051 atmel microcontroller,
I connect push button switch and eprom24c02
my pin connection of 2051 is
pin1 connect via capacitor to eprom pin8
pin2 connect eprom pin 5(SDA)
pin3 connect to eprom pin 6(SCL)
pin4,5 use for oscillator
pin6 coneect to pushbutten swich
pin7,8,9 (not connected)
pin 10 ground
pin11,12,13 (not connected)
pin 14 ,15,16,17,18,19 connect to led
pin 20 supply

Eprom pin
pin 1 (not connected)
pin2,3,4 ground
pin5 2051 pin 2
pin6 2051 pin 3
pin7 ground
pin8 connect via capacitor to2051 (1) pin

swich othr terminal is grounded

my quary is i want to made a program to whaen switch pressed pattern change of led there is 15 pattern in my controller my eprom is not programeble

By: montu patel

montu patel — Mon, 08 Apr 2013 10:46:53 +0000

sir ,

By: montu patel

montu patel — Mon, 01 Apr 2013 12:15:57 +0000

it’simple 1.7 volt led

By: sathish

sathish — Mon, 01 Apr 2013 09:48:22 +0000

in port 1 which are pheripheral devices i.e. moso miso sck