Contributor:
Irfan Khan Irfan
Aim: to design the gsm sim card reader and to interface it to the pc.
Components required:
· Ic 74hc04(inverter). (2 ic’s means 8 gates)
· Crystal oscillator. (just one of about 3.5Mhz)
· 10k ohm resistor. (10 in number)
· Transistor –bc293c. (3 in number)
· Diode. (3 in number)
· 1M ohm resistor
· Led diode
· Capictor each of 470uf(2 in number),100nf(2 in number),33pf(3‘s).
Exclusive Digi-key Tools
Embedded computers
Hardware
Integrated Circuits
Connectors
Transducers
Circuit Protection
· Rs 232 male or female whichever suitable for the connection.
· Simcard reader port of six pins.
Theory:
The sim card interfaces consists of the series of the impedance matching circuits as we see there are six pins and there are eight pins some of the sim’s. The termination resistor has a value of 1- 10k ohm for data line & reset line and here we have 1-2k ohm for the clk line.we here build the circuits as per the pin requirements as we see i have connected the crystal oscillator for the clk pin and the requirement is calculated Vsim pin is connected to the DTR of rs232 terminal, then the clk is to the crystal oscillator,these data lines simdata and Vsim terminalthe the RTS of rs232 is connected to the simrst pin ,the circuit shows almost all the pins covered this is done without using any other ic. We can get this in market rarely but as we know the chip is all integrated to the single cable usb line which has max 232 which converts the TTL logic to the computer logic.
Circuit diagram:
The sim connector and the pin specifications of the sim.
Explanation:
Clock circuit :this circuit helps the device to put the data in and out the sim card memory as we have same i/o pin is connected to the tx and rx via the transistor.
DTR terminal: this terminal is used mainly to make the sim ready to the transmit and receive operations and clearly this helps to transmit the data and helps to convey it to the memory of the sim and clearly we get the data done in putting into the sim memory .
RTS:this terminal is used to give the signal to simrst pin of the sim and makes it reset and this is done in the active low state and which also helps the program to start from the beginning for the new process.
Data i/o is only one and this is brought together by the single transistor and there is a possibility more advanced circuit in the place of that and also we can use more than one transistor or any other network analysis.
Installing the software:
The software installing should have a proper sim card accessible driver this helps in the connecting the device to the host i.e your pc.
But first we have to connect the RS232 to the usb and for this i have shown you the writing attached with this article and also we need to search the software properly.
For example we have the software like Simmaster2.0 which is very rarely got in the web also we have Simprobackup,by these softwares we can have backup also we can use it more if the we are smart enough.
Install the proper softare and also see we have the sim connected and we can extract all kinds of the codes of the particular sim in order to do know.
To run the software on your computer system, you require the following minimum hardware and software configuration settings:
Memory Required:
Hard Disk Space: 5 MB of Free Hard Disk Space
RAM Recommended: 128 MB RAM
Processor Required
Pentium class or equivalent processor
Operating System Required
Any of the Microsoft Windows OS including:
Windows XP
Windows 7
Results:
We can read the data in the sim card of six pin and clearly we can find more usefull codes in it by using suitable software.
Then we need to connect to the rs232 female pin and then convert the signal to the pin of the usb.
Conversion of RS232 to usb port serial
Need for conversion:
RS-232 works on the voltage different than that of the TTL logic. As we see in RS-232 it represents 1 as-3 to -23 and ‘0’ from the +3 to +23. The need is for the circuits of microcontrollers, chips , ic’s ,etc can be interfaced from this conversion. Then from the other end we can use this to connect to the laptop or pc. Then from this we can modify various memory ,rom, codes etc by using a suitable software in the laptop or pc.
source: https://www.engineersgarage.com/contribution/expert/sim-card-reader-for-6-pin-gsm
Irfan Khan Irfan
Aim: to design the gsm sim card reader and to interface it to the pc.
Components required:
· Ic 74hc04(inverter). (2 ic’s means 8 gates)
· Crystal oscillator. (just one of about 3.5Mhz)
· 10k ohm resistor. (10 in number)
· Transistor –bc293c. (3 in number)
· Diode. (3 in number)
· 1M ohm resistor
· Led diode
· Capictor each of 470uf(2 in number),100nf(2 in number),33pf(3‘s).
Exclusive Digi-key Tools
Embedded computers
Hardware
Integrated Circuits
Connectors
Transducers
Circuit Protection
· Rs 232 male or female whichever suitable for the connection.
· Simcard reader port of six pins.
Theory:
The sim card interfaces consists of the series of the impedance matching circuits as we see there are six pins and there are eight pins some of the sim’s. The termination resistor has a value of 1- 10k ohm for data line & reset line and here we have 1-2k ohm for the clk line.we here build the circuits as per the pin requirements as we see i have connected the crystal oscillator for the clk pin and the requirement is calculated Vsim pin is connected to the DTR of rs232 terminal, then the clk is to the crystal oscillator,these data lines simdata and Vsim terminalthe the RTS of rs232 is connected to the simrst pin ,the circuit shows almost all the pins covered this is done without using any other ic. We can get this in market rarely but as we know the chip is all integrated to the single cable usb line which has max 232 which converts the TTL logic to the computer logic.
Circuit diagram:
The sim connector and the pin specifications of the sim.
Clock circuit :this circuit helps the device to put the data in and out the sim card memory as we have same i/o pin is connected to the tx and rx via the transistor.
DTR terminal: this terminal is used mainly to make the sim ready to the transmit and receive operations and clearly this helps to transmit the data and helps to convey it to the memory of the sim and clearly we get the data done in putting into the sim memory .
RTS:this terminal is used to give the signal to simrst pin of the sim and makes it reset and this is done in the active low state and which also helps the program to start from the beginning for the new process.
Data i/o is only one and this is brought together by the single transistor and there is a possibility more advanced circuit in the place of that and also we can use more than one transistor or any other network analysis.
Installing the software:
The software installing should have a proper sim card accessible driver this helps in the connecting the device to the host i.e your pc.
But first we have to connect the RS232 to the usb and for this i have shown you the writing attached with this article and also we need to search the software properly.
For example we have the software like Simmaster2.0 which is very rarely got in the web also we have Simprobackup,by these softwares we can have backup also we can use it more if the we are smart enough.
Install the proper softare and also see we have the sim connected and we can extract all kinds of the codes of the particular sim in order to do know.
To run the software on your computer system, you require the following minimum hardware and software configuration settings:
Memory Required:
Hard Disk Space: 5 MB of Free Hard Disk Space
RAM Recommended: 128 MB RAM
Processor Required
Pentium class or equivalent processor
Operating System Required
Any of the Microsoft Windows OS including:
Windows XP
Windows 7
Results:
We can read the data in the sim card of six pin and clearly we can find more usefull codes in it by using suitable software.
Then we need to connect to the rs232 female pin and then convert the signal to the pin of the usb.
Conversion of RS232 to usb port serial
Need for conversion:
RS-232 works on the voltage different than that of the TTL logic. As we see in RS-232 it represents 1 as-3 to -23 and ‘0’ from the +3 to +23. The need is for the circuits of microcontrollers, chips , ic’s ,etc can be interfaced from this conversion. Then from the other end we can use this to connect to the laptop or pc. Then from this we can modify various memory ,rom, codes etc by using a suitable software in the laptop or pc.
source: https://www.engineersgarage.com/contribution/expert/sim-card-reader-for-6-pin-gsm
