Solar tracking System (AT89C2051)

hi there '
just wanted to know the concept as there is no discription given , i m not good at programming but i was trying to understanding the program, by what concept have u done programming i mean does the MIC controller is programmed to minimize the difference between the two LDR or some thing else . sorry i m not able to explane it to u hope u understand what i mean ? just in simple language How will the microcontroller will detect the sun? ( concept)?

thanks
15853660

Place the two LDR's nearby and place a metal plate in between the sensors as shown below.

Assume the sun if on right side and the panel is an in the figure

So the LDR2 will receive sun light and LDR1 will be in dark. On sensing this the microcontroller will rotate the motor to right until it sense light on both sensors as shown in figure.


The microcontroller will do it repeatly and it wants light on both sensor and take rest when there is nor light on both sensors.

J.Binu
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hi there
in the first part of the circuit to which LDR is connected IC LM393ANE is that a comparator or op-amp.
the output is negative that what i m getting .
please help me

15853660

Its an Op-amp connected as an comparator. The ouput will be gnd or +5v and it will never go negative since the supply voltage of gnd and +5v and not +5v and -5v.

J.Binu
Click here to get free 8051 Codes

hi there
but if u look at the ic LM393ANE on data sheet it says it is compartor
so according to u it is just a normal op-amp just like LM-741
thanks

hi
can u give specification like the outputn from the Op-amp should be ....?
and our output from microcontroller should be .....?

15853660

The ouput of the opamp will be either ground(0v) or Vcc(+5v).
Microcontroller o/p also will be o or 1. That is gnd or +5v.

J.Binu
Click here to get free 8051 Codes

hi there
i have used the IC LM393P but at pin 1 the output that i m getting is in millivolts ?
is it m i using the right IC or some where somthing is wrong?
plz help me out to trouble shoot..

15853660

Take off the LDR and check the ouput, then again short the 2 pins of the LDR's and check the output. If this not work you can subsitude any light sensor circuit there.
But the output voltages should not go beyond 5v.

J.Binu
Click here to get free 8051 Codes

sir,
wat will be the o/p of microcontroller to the stepper motor
also i wanted to know dat,in wat direction should the ldrs be placed ?how many stepper motors should be used and how to interface motors with the relays.pls can u give me the detailed diagram of the motor ckt.its very uegent.
my e-mail id is buzz_vishy@yahoo.co.in