RE2205 aluminum shell special offer

RE2205 aluminum shell special offer

http://www.siliconray.com/re2205-220x52x226-aluminum-enclosure-1.html

Description
RE2205 is an top quality aluminum enclosure. It can be used as enclosure of DAC, solid state or tube headphone amplifiers and preamplifiers.
Features
Outside Dimension:   W x H x L = 220mm x 52mm x 226mm(9''x3''x9'')
Inside Dimension:      W x H x L = 200mm x 48mm x 217mm(8''x2''x8.5'')
Material:                         Aluminum
Front Thickness:          6mm
Back Thickness:           2mm
Top Thickness:             2mm
Bottom Thickness:       2mm
Side Thickness:            4mm (special shape)
Finish:                             Brushed, hard anodized
Net Weight:                   1.2kg

What is a bluetooth module

What is a bluetooth module

http://www.siliconray.com/boards-modules/shoes/db9-interface-serial-port-bluetooth-module.html

DB9 Interface Serial Port Bluetooth Module

Bluetooth module is refers to the integrated bluetooth chip, used for wireless communication network.

In the picture above, have USB interface bluetooth module is USB bluetooth card. Used for wireless Internet access.

BLUETOOTH wireless (BLUETOOTH), is 1998 roll out a new wireless transmission way, is actually replace data cable short-range wireless communication technology, through the low bandwidth waves realize point-to-point, or point-to-multipoint connections between the information exchange. This network model is also called private space network (PAN, PersonalAreaNetwork), is more micro network or delicate bluetooth the main controller/adnexal build mini web based, every small network of eight active device and 255 accessory device structure, and more micro network connection up and formed the expanding nets, and convenient, fast to realize the ?

DDS technology introduction

DDS technology introduction

http://www.siliconray.com/boards-modules/wireless/ad9833-dds-module.html

Brief Description
This DDS board is designed with AD9833 from analog device. It can output sine wave, trianble wave and retangular wave. The resolution is 28bit. Max frequency is up to 12.5MHz.
Features- Small size
- Designed with AD9833
- On board 25Hz oscillator
- Max output frequencyy is up to 12.5MHz
- On board SMA connector for output
- 2.5-5.5V power supply

DDS is A full digital frequency synthesizer, by phase accumulators, waveform ROM, D/A converter and low pass filter composition. The clock frequency after A given, the output depends on the frequency of the signal frequency control word, the frequency resolution depends on accumulators digits, phase resolution depends on the ROM address line digits, amplitude quantization noise depends on the ROM data A word length and D/A converter digits.


DDS have the following advantages: (1) the frequency resolution is high, the output frequency much, can reach a frequency (N for phase accumulators digits); (2) the frequency switching speed, can reach us magnitude; (3) when switching frequency phase continuous; (4) can output the broadband orthogonal signal; A headscarf output phase noise is low, the source of reference frequency phase noise improved; [6] can produce any waveform; [full digital reality

MOSFET (MOSFET) master come in, you absolutely understand

Mosfet absolutely know new brand IPS ~ ~ ~
You know IPS and IR AUK XianTong these international brand of disadvantages compared?
Write a brief SWOT line, probably know what...
Hope to have superior to the point of help,

From the application of the structure, because MOSFET in portable products, LCD TV and the wide application of consumer electronics, make consumer electronics is the biggest application MOSFET market; And with the application of the motherboard, computer business in time, industry control is the third major applications. Sadie consultants predict, future Netbook and by fortress of notebook computers drive, the motherboard will still be China MOSFET the main driving force of rapid development market.

http://www.siliconray.com/catalogsearch/result/?q=MOSFET

By the influence of the financial crisis, the Chinese mobile phone output growth rates in 2008 appear to drop considerably, 2009 will be even negative growth, because in a cell phone with MOSFET mainly in the mobile phone charging protection, mobile phone output growth slowed speed in the impact on the field for the needs of the MOSFET. From market demand ?

Mosfet usage

Mosfet three pins G, D, S meaning. Three pins all respectively by the circuit what position (also can say connect that kind of line, for example, to take the high level, low level, grounding, etc.). Can control switch circuit maximum voltage is how much, 220 v voltage can directly access switch ends? How much is the input voltage mosfet
If someone help me below graph of the mosfet connect well I'll an additional 100 points, said to do it. (the above question answer correctly can also score

http://www.siliconray.com/sense-v1-mosfet-class-a-headphone-amplifier.html

One answer:

1. G grid D leak extremely S to source the figure on the inside of the pipe is N the channel of the MOS, working principle: as long as the voltage on G than S voltages in the big 5-6 V, MOS tube began to conduction, current flow from S D.

2. G meet high and low level (exactly say the driving voltage), D take power supply (high potential), S took the load or low potential.

3. Can control switch circuit maximum voltage is the voltage MOSFET depends on how much the highest value, compression value have how old, can control much of the voltage circuit.

4.220 V may not directly in both ends meet switch.

5. The input voltage MOSFET from the picture not to come out now, no way to tell you, but from the picture to see, not like 220 V, should be low pressure.

The use of switch power supply and introduction

The use of switch power supply and introduction

http://www.siliconray.com/

Switch power supply products widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communications equipment, electric power equipment, instrument and apparatus, medical equipment, semiconductor refrigeration heating, air cleaner, electronic refrigerator, LCD monitor, LED lighting, communications equipment, audio-visual products, security, computer case, digital products and equipment class, etc.

introduction

Along with the power electronic technology high speed development, the power electronic equipment and people's work and life of increasingly close relationship, and electronic equipment is inseparable from the reliable power supply, into the 80 s computer power achieve of switch power supply, the first complete computer power generation, in the 90 s switching power supply are entering the field of various electronic, electrical equipment, process

Switch power supply

Switching power supply is to use modern power electronic technology, www.siliconray.com control switch tube opened and shut off the time ratio, maintain the stable output voltage of a power supply, switching power supply general by pulse width modulation (PWM) control IC and MOSFET composition. Switch power supply, linear power supply and compared to the cost of both as the output power increases, but both growth rate each different. Linear power cost in a certain output power point, but higher than the switch power, this is called cost reversal points. Along with the power electronic technology development and innovation, making the switch power technology is in constant innovation, the cost low output growing point to reverse the power move, the switch power supply provided a broad space for development

How to quick and good learning ARM? Have development board

How to quick and good learning ARM? Have development board

1, learn how to download the Bootloader, through computer installed in a ADS1.2 software; DEMO development board has a ADS engineering documents, can through the ADS is open, you make a file compiler, through the JTAG download to development board.

http://www.siliconray.com/development-boards/arm.html

2, learn how to download

WINCE, development board with specifications, through the "super terminal" step by step and do.

3, learn how to download Linux, development board with specifications, through the "super terminal" step by step and do.

4, you can also play not WINCE and Linux, then you will have to buy a simulator, like playing 51 SCM, control ARM, and also through ADS software design and simulation.

Of course premise condition is: you must C language more skilled, understand the operating system, the bookstore has a book, you can be in accordance with the above step by step operation, through the experiment will soon learn!

How to buy SCM development board

Want to learn 51 SCM, don't know what to buy good development board, taobao many, various types of all have, and takes the color, don't know which to buy. Buy any of the recommended a development board, had better be practical, incidental tutorial easily to learn, can do more than the best. In addition to recommend the practical intro book better, thank you. Problems added:

Color is not useful? As is common LCD practical.

General flowing water lamp, digital tube, matrix keyboard, independent keyboard, liquid crystal, a buzzer, the I2C is about the same, all get through to the single chip is about introduction, the practicality of the color is not big, general test plate on the 8 * 8 dot matrix also can show simple letters Numbers...
As for the book, GuoTianXiang recommend the new concept 51 SCM C language tutorial, introduction, improve, the development, the development QuanGongLve"
Hope that the above information will help you

LCD and LED the most fundamental difference?

Don't know what you say is television screens, if is TV words difference between (you first search LCD display principle, the mobile phone is not convenient for typing), led TV is using led back light, the use of common LCD similar energy-saving lamps back light, in addition to back light other are the same. Of course the former slightly better than the latter.
And cell phone led display is usually refers to oled, show principle and LCD has essential difference, LCD itself not to shine, and through the filter light to realize and colorful, and their own can emit light oled color to achieve and colorful.

At present DaBing oled technology still not mature, so the TV screen is still LCD technology, just used the luminous efficiency higher led as a back light, and small screen oled, has been used, such as samsung mobile phones i9000.
Hope I answer you can