Showing posts with label phone. Show all posts
Showing posts with label phone. Show all posts
Sunday, December 22, 2013
It is the function and feature of cell phone jammer
It is the function and feature of cell phone jammer .
Then the order of execution of its boot program data read from external memory (font, chip). If not read the information at this time, the CPU internal reset (via the CPU internal "watchdog" or
hardware reset command) bootloader If successful completion of implementation, the CPU was taken from the external font program execution, if acquisition procedures are abnormal, it can lead to a
"watchdog" to reset both the program and from address start. The CPU reads the character through the parallel data and address lines and address lines, together with the read and write control
clock line W / R, some readers may ask, font is how to distinguish between the program read, or read the data? Microcontroller with external program memory chip select signal line or the CS, CE,
and the W / R role, you can allow the character to distinguish between read data or program. Install the main machine of cell phone jammer first.
Phone all the software work processes are carried out under the action of the CPU, the specific division of the five processes described below. These processes are software in the form of data
storage in the phone in EEPROM and FLASHROM of when the phones power supply module detects a power key is pressed, the cell phone battery voltage is converted to a voltage suitable for the use of
the phone circuit value supplied to the power module, the clock circuit supply voltage oscillation signal into the logic circuit, CPU voltage and clock signal, performs the boot process, the first
read from the ROM boot code execution logic The self-test of the system. And all of the reset signal is set high, if the self-test through. cell phone jammer will only act on cell phone
communication.
The CPU is given Watchdog (Watchdog) signal to the module, then the power supply module in the role of watchdog (Watchdog) signal to maintain the boot. Phone is switched on, not only search for the
broadcast control signal Road (BCCH) carrier frequency. Because the system at any time be sent to each user in the community users to broadcast control information. Phone to collect the search to
the strongest (BCCH) carrier frequency. The carrier frequency corresponding to the read frequency correction channel (FCCH), frequency and synchronization of the mobile phone (MS). Each users
mobile phone in different morning (both residential) carrier frequency is fixed, it is to determine when the network by the GSM network operator, rather than determined by the users GSM phone.
Mobile phones to read the sync channel. It is 1 set of main machine of cell phone jammer .
More...
Then the order of execution of its boot program data read from external memory (font, chip). If not read the information at this time, the CPU internal reset (via the CPU internal "watchdog" or
hardware reset command) bootloader If successful completion of implementation, the CPU was taken from the external font program execution, if acquisition procedures are abnormal, it can lead to a
"watchdog" to reset both the program and from address start. The CPU reads the character through the parallel data and address lines and address lines, together with the read and write control
clock line W / R, some readers may ask, font is how to distinguish between the program read, or read the data? Microcontroller with external program memory chip select signal line or the CS, CE,
and the W / R role, you can allow the character to distinguish between read data or program. Install the main machine of cell phone jammer first.
Phone all the software work processes are carried out under the action of the CPU, the specific division of the five processes described below. These processes are software in the form of data
storage in the phone in EEPROM and FLASHROM of when the phones power supply module detects a power key is pressed, the cell phone battery voltage is converted to a voltage suitable for the use of
the phone circuit value supplied to the power module, the clock circuit supply voltage oscillation signal into the logic circuit, CPU voltage and clock signal, performs the boot process, the first
read from the ROM boot code execution logic The self-test of the system. And all of the reset signal is set high, if the self-test through. cell phone jammer will only act on cell phone
communication.
The CPU is given Watchdog (Watchdog) signal to the module, then the power supply module in the role of watchdog (Watchdog) signal to maintain the boot. Phone is switched on, not only search for the
broadcast control signal Road (BCCH) carrier frequency. Because the system at any time be sent to each user in the community users to broadcast control information. Phone to collect the search to
the strongest (BCCH) carrier frequency. The carrier frequency corresponding to the read frequency correction channel (FCCH), frequency and synchronization of the mobile phone (MS). Each users
mobile phone in different morning (both residential) carrier frequency is fixed, it is to determine when the network by the GSM network operator, rather than determined by the users GSM phone.
Mobile phones to read the sync channel. It is 1 set of main machine of cell phone jammer .
Thursday, March 28, 2013
Home Phone Wiring Diagram Cat5 Cablecircuit Schematic
Home Phone Wiring Diagram Using Cat5 Cable Circuit Schematic.
Tuesday, March 19, 2013
PHONE BROADCASTER ELECTRONIC CIRCUIT DIAGRAM
PHONE BROADCASTER ELECTRONIC CIRCUIT DIAGRAM
The automatic switching consists of resistors R1-R3, variable resistor VR1 as the regulator, transistor T1 and T2, zener diode D2, and diode D1. R1 and VR1 is useful as an input voltage divider from the telephone line.
Parts list :
- Resistor R1-R2, R4 : 47k ohm
- Resistor R3 : 100 ohm
- Resistor R5 : 22k ohm
- Resistor R6 : 1M ohm
- VR1 : 100k ohm
- Diode D1 : 1N4001
- Zener diode D2 : 24V, 400mA
- Capacitor C1 : o.o1 uF
- Capacitor C2 : 330 pF
- Trimmer C3 : 50p
- Capacitor C4 : 5.6 pF
- Capacitor C5 : 10 pF
- Transistor T1-T2 : BC548
- Transistor T3 : BF494
- Inductor L1 : 45rotation 36SWG in resistor carbon 1M 1W
- Inductor L2 : 3 rotation 21 SWG 12mm diameter
- Antenna
Monday, March 18, 2013
Controlling Motor with a Cell Phone Circuit Diagram Explained
The following article describes a very simple circuit idea which can be used for controlling a motors rotational direction i.e. for moving it either clockwise or anticlockwise through alternate miss calls from your cell phone.
I have already discussed a novel cell phone controlled remote switch circuit where the unit can be used for switching an electrical gadget through the users cell phone. The user just has to call the remote system which responds to the blank calls and generates the required alternate switching of the connected gadget.
The same circuit has been used here also, the output is appropriately modified such that now the unit becomes suitable for toggling the rotation of a DC motor.
The circuit shown below can be used for controlling a motor rotational direction, lets try to understand its functioning details:
The lower section of the diagram consisting of T1, T2, T3 and T4 along with the associated components forms a simple high gain audio amplifier circuit.
This circuit is used for amplifying the ringtone generated by the attached modem cell phone unit.
The modem cell phone handset is an ordinary NOKIA 1280 cell phone which is permanently integrated with this circuit.
The above modem cell phone uses a prepaid SIM card and thus it becomes a self contained receiver module.
When this modem cell phone is called by the owners cell phone, its ringtone activates and gets amplified by the above explained tone amplifier stage.
The amplified signal becomes powerful enough to triggers the relay RL1.
This relay holds or remains activated as long as the call stays connected, and breaks when the call is disconnected.
RL1s N/O contact is supplied with a 12v trigger to the adjoining stage which is a FLIP/FLOP stage, made by using four NAND gates from the IC 4093.
With every alternate missed calls from the owners cell phone, the modem cell phone signals the tone amplifier, which activates RL1, and RL1 in turn flips or flops the IC1 circuit.
The output of the flip flop is connected with a relay driver circuit which is attached with two relays RL2 in parallel. You may use a single DPDT relay also for better convenience.
The contacts of the relays are configured in such a manner that flipping them produces opposite movements for the motor thats integrated to them.
The mains supply to the relay and the motor is taken from RL1, which means the motor flips with every subsequent "missed calls" and remains activated until the call stays connected, and then halts.
The circuit can be modified in many different ways as per the users specifications.
The modem cell phone should be appropriately assigned with a particular continuous ringtone while the default ringtone should be assigned to "empty", tis will make the unit immune to unknown numbers or wrong numbers, and the owner will be the sole controller of the attached circuit and the motors.
Parts List
All resistors are 1/4w 5% CFR unless otherwise stated.
R1 = 22k
R2 = 220 OHMS
R3,R11,R12 = 100K
R4,R6,R7,R9 = 4.7K
R5 = 1K,
R8 = 2.2M
C1,C4,C5 = 0.22uF DISC TYPE
C2,C3 = 100uF/25V
T1,T2,T4,T5 = BC 547B
T3 = BC557 B
ALL DIODES = 1N4148
IC1 = 4093
RL1 = RELAY 12V/400 OHMS SPDT
RL2 = Relay DPDT 12V/400 ohms
L1 = small buzzer coil, small choke or similar.
JACK = 3.5mm AUDIO JACK
CELL PHONE MODEM = NOKIA 1280
I have already discussed a novel cell phone controlled remote switch circuit where the unit can be used for switching an electrical gadget through the users cell phone. The user just has to call the remote system which responds to the blank calls and generates the required alternate switching of the connected gadget.
The same circuit has been used here also, the output is appropriately modified such that now the unit becomes suitable for toggling the rotation of a DC motor.
The circuit shown below can be used for controlling a motor rotational direction, lets try to understand its functioning details:
The lower section of the diagram consisting of T1, T2, T3 and T4 along with the associated components forms a simple high gain audio amplifier circuit.
This circuit is used for amplifying the ringtone generated by the attached modem cell phone unit.
The modem cell phone handset is an ordinary NOKIA 1280 cell phone which is permanently integrated with this circuit.
The above modem cell phone uses a prepaid SIM card and thus it becomes a self contained receiver module.
When this modem cell phone is called by the owners cell phone, its ringtone activates and gets amplified by the above explained tone amplifier stage.
The amplified signal becomes powerful enough to triggers the relay RL1.
This relay holds or remains activated as long as the call stays connected, and breaks when the call is disconnected.
RL1s N/O contact is supplied with a 12v trigger to the adjoining stage which is a FLIP/FLOP stage, made by using four NAND gates from the IC 4093.
With every alternate missed calls from the owners cell phone, the modem cell phone signals the tone amplifier, which activates RL1, and RL1 in turn flips or flops the IC1 circuit.
The output of the flip flop is connected with a relay driver circuit which is attached with two relays RL2 in parallel. You may use a single DPDT relay also for better convenience.
The contacts of the relays are configured in such a manner that flipping them produces opposite movements for the motor thats integrated to them.
The mains supply to the relay and the motor is taken from RL1, which means the motor flips with every subsequent "missed calls" and remains activated until the call stays connected, and then halts.
The circuit can be modified in many different ways as per the users specifications.
The modem cell phone should be appropriately assigned with a particular continuous ringtone while the default ringtone should be assigned to "empty", tis will make the unit immune to unknown numbers or wrong numbers, and the owner will be the sole controller of the attached circuit and the motors.
Parts List
All resistors are 1/4w 5% CFR unless otherwise stated.
R1 = 22k
R2 = 220 OHMS
R3,R11,R12 = 100K
R4,R6,R7,R9 = 4.7K
R5 = 1K,
R8 = 2.2M
C1,C4,C5 = 0.22uF DISC TYPE
C2,C3 = 100uF/25V
T1,T2,T4,T5 = BC 547B
T3 = BC557 B
ALL DIODES = 1N4148
IC1 = 4093
RL1 = RELAY 12V/400 OHMS SPDT
RL2 = Relay DPDT 12V/400 ohms
L1 = small buzzer coil, small choke or similar.
JACK = 3.5mm AUDIO JACK
CELL PHONE MODEM = NOKIA 1280
Sunday, March 17, 2013
Portable Phone Preamplifier
This unit was designed for fans to have an old vinyl record collection and willing to be digitally remastered on a personal computer. Or sometimes you can hear an old collection of priceless LP, through its modern hi-fi, usually without a preamp stage: this is a circuit capable of meeting their needs. The unit is powered by a 9V battery, allowing for quick and easy connection to all the pre-amp high level input and drawing very low current circuit ensures long battery life.
Despite the low voltage circuit performance with moving magnet pick-up is quite good, with high input overload capability, very low distortion and accurate reproduction of the RIAA equalization curve, thanks to one of two stages of the operational amplifier circuit in which the RIAA equalization network is divided into two halves: an input stage of the application of low-strengthening the RIAA equalization curve in a cable series feedback configuration and a second stage, the application of the acute curve cutting through a second operational amplifier connected to the shunt feedback configuration.
Battery operation is also minimized the possibility of hum pick-up, a potential danger is always present in a high gain, high sensitivity phono preamps. As the drawing of the total circuit current is 1. 2 mA when powered by a 9V battery, the use of an LED lamp will be the main cause of current consumption. Therefore, a very small, low current red LED recommended for this purpose. With a resistance of 6.8K limit specified for R11, the LED will draw an additional current of 1 mA, it will not shine, but can still be easily seen.
A typical carbon-zinc 9V battery will allow the circuit to operate about 180 hours, while an alkaline battery will last over 250 hours. If the LED is omitted, the duration is almost double. In any case, for those who wish to preserve the battery, the circuit can also be powered by a common external adapter power supply, valued at about 12-15V DC, 10 mA or higher. In this case, the input circuit overload will increase even more.
Sunday, March 10, 2013
How to Build a Simple PWM Controlled DC to DC Cell Phone Charger Circuit – Science Fair Project
The explained circuit can be easily made at home by any school kid and used for displaying in his science fair exhibition. The circuit is a simple cell phone charger that may be operated in conjunction with any DC source, from a car or a motorcycle battery or from any ordinary 12 V AC DC adapter.
Nowadays we find most of the vehicles have their in built cell phone battery charger units which surely becomes very handy for travelers who mostly remain outdoors travelling in their vehicle.
The proposed cell phone charger circuit is as good as the conventional chargers which come fitted inside the cars and bikes.
Moreover the circuit can be simply integrated to ones own vehicle if the feature is not originally available in the vehicle.
Alternatively one may think of manufacturing the present unit and selling them in the market as an automobile cell phone charger and earn some hard bucks.
Circuit Description
Cell phones as we all know are highly sophisticated gadgets by nature and when it comes to charging cell phones the parameters no doubt also needs to be of very high standards.
The AC/DC cell phone chargers which come with the cell phones are all SMPS based and are extremely good with their outputs and that’s why the cell phone gets so efficiently charged by them.
However if we try to make our own version, it may fail altogether and the cell phones may just not respond to the current and display a “not charging” on the screen.
Cell phone battery cannot just be charged by supplying DC 4 volts, unless the current is optimally dimensioned the charging won’t initiate.
Using voltage regulator IC for making a DC to DC charger, which I myself have discussed in one of my earlier article is a good approach, but the IC tends to become too hot while charging the cell phone battery and therefore requires adequate heatsinking for remaining cool and operative.
This makes the unit a bit bulkier and moreover some significant amount of power is wasted in the form of heat, so the design cannot be considered very efficient.
The present PWM controlled DC to DC cell phone charger circuit is outstanding in its respect because, the involvement of PWM pulses helps to keep the output very suitable to the cell phone circuitry and also the concept involves no heating of the output device, making the entire circuit truly efficient.
Looking at the circuit we find that again the work horse IC 555 comes to our rescue and performs the important function of generating the required PWM pulses.
The input to the circuit is supplied through some standard DC source, ideally from an automobile battery.
The voltage powers the IC which instantly starts generating the PWM pulses and feeds it to the components connected at its output pin #3.
At the output the power transistor is used for switching the DC voltage at its collector directly to the cell phone.
However only the average DC voltage is finally fed to the cell phone due to the presence of the 100uF capacitor, which effectively filters the pulsating current and provides a stable, standard 4 volts to the cell phone.
After the circuit is built, the two pots will need to be optimized perfectly so that a well dimensioned voltage is produced at the output which may be ideally suited for charging the cell phone.
Parts List
R1, R2, R3 = 1K,
P1, P2 = 47K,
C2 = 1n,
C3, C1 = 100uF/25V
IC1 = 555
D1, D2, D3 = 1N4007
T1 = TIP127
T1 = TIP127
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