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stepper motor driver circuit
Sorry, let me upload once again....................
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Posted by gopi on

Conversion from Hex to int
Sorry, for the above quotes,


Write the code as below, such that u display ASCII characters on LCD and store BCD value (i.e.,0x02..0x03 etc) on the array.

// global defination
unsigned char xdata xram[100...

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Max limit of global variable declartion in 89c52
code -- Constant data in program memory
bit -- Bit data in internal data memory
bdata -- Bit-addressable data in internal data memory
data -- Internal data memory
far -- far memory (RAM space)
const far --...
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Max limit of global variable declartion in 89c52
The internal RAM of 8052 is totally 256bytes. But whenever u declare, char or int or any other declaration it will use 00h to 7Fh RAM address memory i.e., only 128bytes. If u declare idata char or ida...
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Total Noob With Some Qs (8051+Serial)
Within ur code u mentioned TH1=0xfa. but Th1=0xfd for 9600 baud rate with 11.0592MHz.
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square wave generation using 8051
The above code given provides 1.085µsec for every half cycle. if u want this delay for one cycle then, u need to use 6MHz crystal rather than 11.0592MHz.
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My Project Published in this month's EFY issue
Thats really exclusive pics.................. ;);)
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ceiling fan control with rc5
You can do this by using PWM technique through controlling a Electronic switch like Thyristor.......
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interfacing gsm cell phone with gps reciever!
Have you tested this code in keil debug or on proteus? If u do it on keil debug you will get the output at serial window.
Where as at proteus u need to change the crystal frequency as 11.0592MHz at 80...
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Posted by gopi on

interfacing gsm cell phone with gps reciever!
Try sending your "AT" commands to mobile in this order AT+CMGF=1<enter> , AT+CPMS="SM"<enter> and AT+CMGS="mobile no."<enter><enter the msg you want to send><ctrl+Z>.


And its better if you us...
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