plz help me..... : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes

Forums

8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes :: Forums :: Project Development :: Project Help		<< Previous thread \| Next thread >>
plz help me.....


Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph

Author

Post

tayyab

Mon Jun 23 2008, 08:51AM

Registered Member #8482

Joined: Wed Jun 18 2008, 06:55AM

Posts: 1
Thanked 0 times in 0 post

i want to make a speed and distence meter for a boat by using microcontroller.
a speed signal is generated by a sensor which has the frequency equals to the 10 times of engine shaft ratation. eg if engine shaft is rotating 60 times in a second then sesor gives the signal of 600 Hz. sensor also generate a refresh pulse in a second with pulse width of 0.33 sec.
the question is that how to programme the microcontroller for counts these pulses. thanks

tayyab

pdi33

Mon Jun 23 2008, 10:49AM

Registered Member #1329

Joined: Mon Jun 04 2007, 09:28AM

Posts: 548
Thanked 109 times in 105 posts

use the internal counter of the 89c51. here u have to just input the pulses from the speed sensor (assuming they are at +5V level) to the T0 pin of the uC. Check the TMOD and TCON registers of the 89c51 in its datasheet for the description of how to use the internal timers of 8051 in counter mode.
If the refresh pulse u mentioned is another output of the sensor, then connect that input to the external interrupt of the 89c51 so that it can be processed in the respective interrupt service routine.

* inspired to develop,developing to inspire *

grace

Tue Jun 24 2008, 03:57PM

Registered Member #8595

Joined: Tue Jun 24 2008, 03:51PM

Posts: 1
Thanked 0 times in 0 post

hello can anybody help me find a book regarding mobile robotics..

" i wish i had the courage to tell the world that i am falling for you"

pdi33

Tue Jun 24 2008, 08:53PM

Registered Member #1329

Joined: Mon Jun 04 2007, 09:28AM

Posts: 548
Thanked 109 times in 105 posts

hi grace,
please stick to the subject of the thread. Post ur doubt on a new thread in the appropriate section of the forum.
here is a link to the appropriate place for ur doubt:(e-books & tutorials section)
http://www.8051projects.net/forum18.html

[ Edited Tue Jun 24 2008, 08:56PM ]

* inspired to develop,developing to inspire *