Showing posts with label of. Show all posts
Showing posts with label of. Show all posts

Friday, December 20, 2013

Main function of TV tuner

Main function of TV tunerThe main function of the tuner is to select the RF signals from the desired frequency spectrum wave on VHF and UHF and more signs in the air Changing RF variable into a fixed IF frequency and to provide sufficient strengthening to cover the original data that has been transmitted.


Block diagram of a series of TV tuner to receive the frequency VHF / UHF

blok diagram tv tuner


Operational Tuner [Theoretical]

Tuner is controlled by a microprocessor in the TV chassis, which functions to receive / select a frequency. Exchange of information is channeled through the terminal Address, Clock and Data.

In the tuner, there are ICs that function to translate the instruction / data so that the tuner can function to select the desired frequency. The IC consists of some combination of series, including PLL, Local Oscillator [VCO], Mixer and IF amplifier. Everything artifacts in one chip / one chip. For further analysis, CXA3135 IC with I2C format will be taken as an example.
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Monday, December 16, 2013

Protection of the Mosfet in flyback power supply

PKC-136 PEAK CLAMP CHARACTERISTICS VBR 160Vdc VDRM 700Vdc P 1.5W. See Circuits Diagram below :


Protection of the Mosfet in flyback power supply
Protection of the Mosfet in flyback power supply  
Feature :
- Protection of the Mosfet in flyback power supply
TRANSIL™ and blocking diode in a single package BENEFITS
- Accurate voltage clamping regardless load
- Reduced current loop
- Reduced EMI emission
- High integration
- Fast assembly
- Reduced losses in stand by mode

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Monday, November 18, 2013

Main function of TV tuner

Main function of TV tunerThe main function of the tuner is to select the RF signals from the desired frequency spectrum wave on VHF and UHF and more signs in the air Changing RF variable into a fixed IF frequency and to provide sufficient strengthening to cover the original data that has been transmitted.


Block diagram of a series of TV tuner to receive the frequency VHF / UHF

blok diagram tv tuner


Operational Tuner [Theoretical]

Tuner is controlled by a microprocessor in the TV chassis, which functions to receive / select a frequency. Exchange of information is channeled through the terminal Address, Clock and Data.

In the tuner, there are ICs that function to translate the instruction / data so that the tuner can function to select the desired frequency. The IC consists of some combination of series, including PLL, Local Oscillator [VCO], Mixer and IF amplifier. Everything artifacts in one chip / one chip. For further analysis, CXA3135 IC with I2C format will be taken as an example.
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Sunday, October 20, 2013

Type of pneumatic valve

Pneumatic Valve Types
Pneumatic valves have many types and functions. pneumatic valves .The role as a regulator / controller in the pneumatic system. Components such control or so-called valves (Valves). Pneumatic Valve types can be grouped according to the construction design as follows:

valve type, valve type species, type of pneumatic valve, control valve components
a. Poppet valves (Poppet Valve Pneumatic)
■ Ball Valve (Ball Valve Pneumatic Seat)
■ Disc Valves (Pneumatic Valve Seat Disc)

b. Slide valve (slide valve Pneumatic)
■ Longitudinal Slide
■ Slide Plate

Meanwhile, according to its function valves are grouped as follows:
a) Valves Steering (Directional Control Valves)
b) One-way Valve (Non Return Valves)
c) Regulatory Pressure Valve (Pressure Control Valves)
d) Flow Control Valves (Flow Control Valves)
e) open-close valve (Shut-off valves)

While the arrangement order in the pneumatic system can be described as follows:
■ The input signal or input element gets energy directly from
power source (air felts) are then transmitted to the processor
signal.
■ The signal processor or processing element signal processing
logic inputs are to be forwarded to the fi nal control element.
■ end of the control signal (final control element) that will drive the direction of movement of the actuator output (working element) and this is the end result of the pneumatic system.

- Pneumatic-Valve Types
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Friday, October 18, 2013

Digital Thermometer with data processing of a microcontroller AT89C4051

digital thermometer
Digital Thermometer 0-100.0°C is a digital thermometer that operates in modetemperature measurement in Celsius (° C). Digital Thermometer 0-100.0 ° C in this article uses data processor in the form of a microcontroller AT89C4051.



Temperature sensors used in Digital Thermometer 0-100.0 ° C. This temperature sensor LM35D. Digital Thermometer 0-100.0 ° C. It uses the temperature measurement data viewer in the form of 1 line LCD viewer. Digital Thermometer 0-100.0 ° C. It can display the temperature measurement data with a resolution of 0.1 ° C.

Digital Thermometer with data processing
Digital Thermometer Circuit Diagram


Digital Thermometer 0-100.0 ° C. These temperature sensors make use of LM35D as temperature sensing. In Digital Thermometer 0-100.0 ° C. This temperature sensor measurement data this LM35D (Level Voltage) is then converted into 4-bit binary data using the ADC CA3162.

Then the 4-bit data from ADC CA3162 which is a measurement of data if the temperature is in the AT89C4951 microcontroller so that it becomes an operating principle of temperature measurement based on digital thermometers. In the final stage of the Digital Thermometer 0-100.0 ° C. This is the appearance of digital data temperature measurement, using digital data viewer of the LCD 1 line.
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Thursday, October 3, 2013

Digital Thermometer with data processing of a microcontroller AT89C4051

digital thermometer
Digital Thermometer 0-100.0°C is a digital thermometer that operates in modetemperature measurement in Celsius (° C). Digital Thermometer 0-100.0 ° C in this article uses data processor in the form of a microcontroller AT89C4051.



Temperature sensors used in Digital Thermometer 0-100.0 ° C. This temperature sensor LM35D. Digital Thermometer 0-100.0 ° C. It uses the temperature measurement data viewer in the form of 1 line LCD viewer. Digital Thermometer 0-100.0 ° C. It can display the temperature measurement data with a resolution of 0.1 ° C.

Digital Thermometer with data processing
Digital Thermometer Circuit Diagram


Digital Thermometer 0-100.0 ° C. These temperature sensors make use of LM35D as temperature sensing. In Digital Thermometer 0-100.0 ° C. This temperature sensor measurement data this LM35D (Level Voltage) is then converted into 4-bit binary data using the ADC CA3162.

Then the 4-bit data from ADC CA3162 which is a measurement of data if the temperature is in the AT89C4951 microcontroller so that it becomes an operating principle of temperature measurement based on digital thermometers. In the final stage of the Digital Thermometer 0-100.0 ° C. This is the appearance of digital data temperature measurement, using digital data viewer of the LCD 1 line.
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Tuesday, October 1, 2013

Type of UPS Uninterruptible Power Supply

UPS design of the model is divided into several types that produce different performance characteristics:
A. Standby
2. Line Interactive
3. Double Conversion On-Line
4. Delta Conversion On-Line
Standby UPS types
This type is commonly used by home users for the Presidency with their PC. UPS to be able to do this type of filtration against power failures and flow management, in addition to design efficient, small size and inexpensive.

Line Interactive UPS types
Type of UPS | Uninterruptible Power Supply UPS is the type most often used in small business unit, web developer, and a number of servers located in government departments. Because, in addition to having high levels of reliability, this type also have the ability to adjust the voltage that is sufficient
fine.
UPS has an inverter is always connected to the output of the UPS system to convert the power from batteries into AC. In normal circumstances, the Inverter will perform battery charging. While in a state of power outages, Transfer Switch will close and drain power from the batteries to the UPS output. Position that is always connected to the inverter output filter provides additional power. This makes the type of UPS is widely used for server and electrical conditions are not too good.

Double Conversion type UPS On-Line
This type is most common for UPS with power more than 10kVA. These types have in common with the type of Standby. Only this type has a power source located on the inverter, not the AC power source. In this type, the main electricity supply interruption will not trigger a transfer switch for the incoming AC power to the central input to charge the batteries that provide power to the Inverter located at the output. Therefore, when the AC power is disconnected, the flow of energy will be transferred immediately without taking a break when the transfer occurs. This type of UPS above shows the performance of the average. Can be said of this type of approach the ideal of a UPS, unfortunately this type of heat is high enough.

UPS type Delta Conversion On-Line
Almost the same as the Double Conversion type, type Delta used to always supply voltage Inverter. When the power supply is interrupted, this type do the same with Double Conversion type. Delta Conversion has two functions, the first is to control the input power characteristics. While the second function is to control the input current to direct the process of charging the battery system. The thing to remember is to minimize this type of energy is wasted. In addition, it has a high compatibility to various types of generators and reduce the need for the use of cables.
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Tuesday, September 24, 2013

The New Technology of Auto Sound Systems

So what kind of auto sound system really seems to float your boat? Are you the type of person who wants the simplest sound system on the market today? Will you be content with talk radio and a few FM radio stations? Do you need an 8-track? How about a cassette player? I hate to say it, but if you are still living in the past, you will have a rather difficult time finding an audio system for your car that can accommodate your desire to hold technology behind the current trends. These things simply do not sell. You may find an occasional auto sound system that still has a cassette player but for the most part you will find that the market for this device is almost as limited as the quality of the device itself.


The New Technology of Auto Sound SystemsTodays auto sound systems are more sophisticated than they have ever been before. Gone are the days when you had to turn a dial to find a radio station. Today you can set your car to scan the stations until you find one you like. You can even set them to scan radio stations by type. For me, that was a great invention as I find country music rather sad and always end up finding the one song that will bring uninvited torrents of tears while flipping through the stations mindlessly as I drive. Being someone that hates to cry on any given day it is bad enough to cry. Add to that the fact that Im probably driving at about 75 or so miles an hour and you can probably see where this is problematic. I do best whenever I can avoid country music stations all together.

Another great technological advance when it comes to the auto sound system is individual volume control. No longer do you have to listen to your mothers, brothers, sisters, or Aunt Sallys music blaring, you can slide on your headphones and mute out the noise of the rest of the world. If your vehicle has a truly sophisticated sound system, you can even change the radio station in order to find music that is much more suitable for your musical tastes.

You should also be aware that todays auto sound systems are much more user friendly than those of days past. Most displays are digital and easy to read. You might even notice that many can read the local radio stations codes and formats and will list the songs that are playing for you. Youll never have to wonder about the name of that great song you just heard or even who sang it again. Its right before your eyes as you are driving along and listening to awesome tunes.

The best auto sound systems offer not only CD options to drivers and passengers alike but also the ability and capability of reading and interpreting MP3 data as well. More and more people are turning to MP3s for their primary source of music. It takes up far less space than your average CD holder and holds a lot more music. You can download only the songs you like without purchasing an entire CD full of songs only to find that you only liked one song on the entire CD. You can put your favorite songs on a memory stick and bring them along for the ride. Its a great way to enjoy music in this day and age. Im quite literally surprised that I havent seen an iPod auto sound system pop up on the radar yet and am seriously expecting to see one any day now, literally.

Regardless of whether or not you wish to enter the modern era of music and music listening its upon us. However, if you are truly opposed we could always find you a nice supply of Sinatra in MP3 format in order to make the transition a little more comfortable for you.

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Sunday, September 15, 2013

Stereo Circuit Schematic of The ADAU1592 Audio Power Amplifier



Stereo Circuit Schematic of The ADAU1592 Audio Power Amplifier



This is a stereo circuit schematic of the ADAU1592, a 2-channel, bridge-tied amount (BTL) switching audio ability amplifier. You can administer ADAU1592 on collapsed console televisions, pc audio arrangement and/or mini-components applications.


According to the ADAU1592 datasheet, an alien aegis ambit is recommended to be added for applications that crave accumulation voltage (PVDD) >15 V, you can use RC snubber or Schottky diode for this purpose. To anticipate the exhausted frequencies of asynchronous clocks (if appliance assorted ADAU1592s) in the audio band, it is recommended to use alone one alarm antecedent if the ADAU1592s allotment the aforementioned ability supply.


You can additionally body a archetypal address appliance ambit of the ADAU1592 by affairs pin 11 (MO/ST) to argumentation high, with abundant account in the datasheet.
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