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you no need to assign for chip select by default it is high only , you only need to assign for adc is data 8 pins be sure the pins you connect in the circuit either from 0 to 8 or 8 to 0 th bit arrangement, three pin for control pin of adc rd, wr, intr……. totally you need tow ports one for data and another for control
Program to interface single seven segment
#include<reg51.h>
delay_ms(int time) // Time delay function
{
int i,j;
for(i=0;i<time;i++)
for(j=0;j<1275;j++);
}
void main()
{
char num[]={0x40,0xF9,0x24,0x30,0x19,0x12,0x02,0xF8,0x00,0x10}; // Hex values corresponding to digits 0 to 9
int c;
while(1)
{
for(c=0;c<10;c++)
{
P2=num[c];
delay_ms(200);
}
}
}SIM cards use a protocol based on an Open Systems Interconnection Reference Model.
Tranmission Protocols
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Information between the SIM and the device is sent via Protocol Data Units (TPDUs), for which there are two common protocols: T=0 and T=1. These protocols differ in the information structure by which the device and SIM card communicate.
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T=0
The T=0 protocol is a byte-oriented protocol, meaning as little as one byte of information can be transferred in a given transmission. It uses a data structure that is sent from the device to the SIM and back, a process in which it establishes a command and response structure.
T=1
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T=1 is a protocol that enables blocks of data to be transferred between the SIM card and the device. These blocks are categorized as the supervisory block, information block and receive-ready block. A supervisory block controls data transfer, an information block enables the exchange of data between the SIM card and device application, and a receive-ready block acknowledges (or denies) a received block of information.
yes we can use the sim memory as external memory , in addition to that only certain range of baud rate level it will work if you are assigning with micrcontroller 9600 baud rate is must .
its just a comparator circuit using opamp one pin is assigned for refernce input another input signal is considred to be the input from signal if signals cut because of retransmit of signal from ultrsonic the circuit logic changes to ouput 0, whether output logic 0 or logic 1 condition is assigned by the user depend on the terminal which we passed our refernce input(constant input).
you dont need a converter use a regulator to convert your high input voltage to lower voltage from same source use 7812 voltage regulator
some dump software cannot execute the hexfile properly so better you try this code with any other dump software
amlifier is a circuit which is used to boost the amlitude level with the help of souce conncected to it. operational amplifier uses negative feedback conncted to its inverting terminal, where input and output is out of phase. generally ideal opamp has high input impedance and low output impedance .
hi antino before you move towards band pass first consider the low pass and high pass filter , low pass filter conncetion is possible to implement with the help of passive component such as resistor capacitor and inductor, usign rc circuit low pass and high pass filter deisgn is possible , if once you use this circuit combination as filter consider capacitor or inductor act as reactance and operation should be cosnidered as freq, so frequency and reactance is inversely proportional . if freq rises reactance low and vice versa . band pass is comination of high pass filter connected with low pass filter . if you know low and high pass filter thoroughly band pass and stop is easier
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