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utkarshjain
02-02-2010, 10:30 PM
i am using at89s52 m.c.u and 4 motors interfaced by l293d..the diagram is given the attachment ....1,2,3,4 are remote inputs..
21,22,23,24 are used...all other pins are left unconnnected...plz tell if dere is any error or not in it???if any suggestion do tell..

rao
02-02-2010, 10:43 PM
Circuit diagram looks good. But do you think the l293D will be able to power all your motors?

utkarshjain
02-02-2010, 10:45 PM
i hope so as both of them are connected in parallel...if it is not true then suggest me another method

utkarshjain
02-02-2010, 10:54 PM
motors are dc geared 100 rpm 12v rated

saptrix
02-03-2010, 02:06 PM
@utkarsh: which motors are u using? the plastic GB ones?

utkarshjain
02-03-2010, 11:36 PM
here is the pic of that...
i don't know what are u talking about

docel
02-04-2010, 01:18 AM
Those are Tape-recorder motors that draw abt 160ma each. The L293d can drive it , provided the motors dont stall for a long time. But.....Why do you need the 89S52 for this ??

utkarshjain
02-04-2010, 12:41 PM
at89s52 is reqd to control the input from remote and give corresponding output to motors via l293d converting +5v to +12 v...

utkarshjain
02-04-2010, 12:42 PM
i wanted to apply m.c.u in this project

docel
02-04-2010, 08:27 PM
An MCU is overkill and not required for this. Unless, ofcourse, you are implementing WM,PID or some other self respecting technique.

utkarshjain
02-04-2010, 09:27 PM
well i have used mcu now...if i would have known this than i would have never gone for m.c.u for this project..actually i am not used to relays and i didn't knew about their use in this roborace project...can u give me the ckt diag for such project...i would be highly delighted? thanx for the suggestion

mohit4u
02-27-2010, 06:30 PM
Utkarsh are you using d.c motors

rao
02-27-2010, 08:24 PM
Go through these

Basic Relay Guide
http://autospeed.com/cms/title_Using-Relays/A_2741/article.html

Using with AVR microcontroller
http://www.scienceprog.com/drive-relay-with-avr-microcontroller/

shashak
02-27-2010, 10:06 PM
still the same, all post are SOS calls of how to light led, how drive motors, how to program x51 series. :(
come on guys use google instead, and come here when your findings dint worked. Most of old guys whould agree that they had made motors rolled with little hit and trail of there own, never asked for complete schematics. If you are in real hurry there are many online stores with good workable solutions.

Bouncing back to me, why dont we start some tutorial series or whatever on little advance things like ARM micros, beggle board or something ??