[umar farrok]

hi bro how are you are you in nano electronics, i know basics about nano electronics basically i am electronics engineer e.c.e , share your study contents and new detials about nano electronics when you have free time

 

[umar farrok]

better u use pir sensor with gsm sim 300 or gsm sim 900 module for your concept

[umar farrok]

DTE(data termnal equipment ) contain male (pin ) placed in any of the devicesits a kind of host  and that devices is used to connect with DCE(data communication equipment) contain female (holes) its a kind of target

[umar farrok]

I want to know why they have change the current direction concept (conventional , directional)?, electron flows from negative to positive right if we use conventional method any advantage behind that, drift velocity is more in negative to positive potential region then direct current is best the name itself suggest direct way to accelerate electrons to move positive region

[umar farrok]

try this code 

SCON=0X50;

TMOD=0X20;

TL1=TH1=0XFD;

TR1=1;

 inside main

while(RI==0);

{

RI=0;

msg=SBUF;

SBUF=msg;

while(TI==0);

TI=0;

}

[umar farrok]

in serial  communication only u can send a byte at a time so its not possible to send a datat type other than char instead u can use ascii values for particular values display  for ex value 0 ascii is 0x30 like wise u can separate the values and try it for float values to display

[umar farrok]

through wireless or wired kind of robo robo mean simply a motor interfacing  only control can be done by switches itself

[umar farrok]

better you try this  for eg :  ‘h’  in 16×2 

cmdwrt(0x64);

datwrt(16);

datwrt(16);

datwrt(16);

datwrt(16+8+4);

 etc like that

finally after assigned for h character mention where you want to display this

cmdwrt(0x80);

[umar farrok]

why we are using conventional current concept instead of direct current flow , therotically we studied all the voltage will flow from positive to negative , but its not, practically the current flows from negative to positive right.

[umar farrok]

ultrasonic circuit transmit a signal and getting back the signal as echo inside a comparator is there to calculate the transmitted signal with echo signal with respect to distance if the trasmitted signal is sending signal with some duration of pulse and check whether the echo signal is repaeated or not if echo repaeated transmiiter signal stops the sending signal and control goes to comparator to check the obstacle distance with inpur an  reference values

[umar farrok]

yeah you can try with electro magnetic relay for your valves , each valve require one relay to work it try 12v 230v relay or try for 440 v relay

[umar farrok]

in your program itself you can do it use relay to trip on only the condition is satisfies other than that the relay trip the supply off for the gsm modem try it

[umar farrok]

try that code in your hyper terminal window after connecting your gsm module with sim

[umar farrok]

basic commands to check the gsm modem working properly or not  follow the commands 

at        pres enter

at+cmgf=1    press enter

at+cmgs=”your mobile number”    press enter

-> type your message to your reciever end people

finally press (control +z) 

 

 

[umar farrok]

why you are trying with 4 bit better you try with 8 bit temperature sensor lm 35 temp range starts from -50 to 150 degree so assign it with 8 bit character value using 16×2 lcd 

 

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