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Really in ARM and FPGA entire color independent video frequency LED system_FPGA, ARM, led
Sunday, December 6th, 2009 at 10:58 | No commentsCategories: Embedded systemShort Content: At present, the display monitor mainly has two kinds according to the data transmission mode: One kind is uses with the computer demonstration identical content real-time video frequency screen; Another kind for through means of communication and so on USB, ethernet issues the demonstration content display monitor's independent video frequency source display monitor, if selects the wireless communication method, but may also momentarily renew the demonstration content, the flexibility is high. In addition, provides the video frequency source ... -
51 monolithic integrated circuit 8 * 8 lattice LED display principle and procedure_51 microcontroller, led, dot matrix
Wednesday, December 2nd, 2009 at 03:56 | No commentsCategories: Embedded systemShort Content: Demonstrates cylindrically in 8X8 on lattice LED, lets it move smoothly from left to right first three times, next moves smoothly from right to left three times, moves smoothly from top to bottom once more three times, finally moves smoothly from bottom to top three times, so circulates gets down. 1. Programming content 8X8 the lattice LED principle of work showed: the 8X8 lattice altogether needs 64 light emitter diode composition, and each light emitter diode is the ... -
Based on S3C44B0 large-scale LED display system design_led, S3C44B0
Saturday, November 21st, 2009 at 12:09 | No commentsCategories: Embedded systemShort Content: Abstract: Introduction based on S3C44B0 control large-scale LED display system. The data transmission selects the parallel main line method, and proposed that the LED display module mansion demonstrated the lock saves the unit hypothesized regards as a section of continual memory cell, controller carries on the data transmission and the control using S3C44B0 the internal DMA, saves the use command transmission data extra software overhead, enables it to have the transmission speed to be quick, the efficiency high characteristic, ... -
Based on AT89S52 Chinese character multi-way display monitor’s design
Tuesday, May 26th, 2009 at 23:05 | No commentsCategories: SCMShort Content: 1 introduction In the life the visible advertisement finds at everywhere, mostly uses the LED Chinese character display monitor, but the Chinese character display module may the immediate influence advertisement itself effect. Chinese character display module has many kinds of forms based on AT89S52 the LED, including the Chinese character entire screen demonstrated that the Chinese character demonstrated from right to left, the Chinese character demonstrated from bottom to top, the Chinese character pulls the curtain type demonstration and so ... -
Based on the STC monolithic integrated circuit and GPRS chart article LED screen
Tuesday, May 26th, 2009 at 18:39 | No commentsCategories: SCMShort Content: 1 preface GPRS (General Packet Radio Service, general grouping wireless service) the appearance has used the existing GSM network fully, is not only suitable for interrupted, burst characteristics or frequent, the few data transmission, is also suitable for the occasional great data quantity transmission. It causes the mobile communication and the data net combines, it uses "the packet switching" (Packet Switch) the concept develops a set of wireless transmission mode, but uses the existing radio-frequency spectrum highly effective, is the ... -
Negative charge pump white light LED driver’s design
Tuesday, May 5th, 2009 at 10:07 | No commentsCategories: Power SupplyShort Content: OutlineThe current many portable expense class electronic products, for example the handset, PDA, the MP3 player, the notebook and so on have the display monitor, although the different application will differ from regarding display monitor's type as well as the size, but regarding the general designers, needs for its design back light electric circuit. White light LED was considered that is the small hand-hold equipment colored monitor's ideal back light source.The actuation white light LED simple method is uses the ... -
Integrated power level LED and constant current electric circuit integration design
Sunday, February 22nd, 2009 at 03:02 | No commentsCategories: Power SupplyShort Content: 1 introduction At present, the power level LED product has two kinds to realize the way: First, used the sole big area power level LED chip seal, the US, Japan already had the 5W chip product to push to the market, needed the low pressure big electric current the constant flow actuation power source power supply, its price was also quite high; Another kind was selects the low power chip integration method to realize power level LED, the Japanese Matushita ... -
Realizes - en.51rd.net based on the SP6648 flashlight LED light circuit
Saturday, February 14th, 2009 at 10:02 | No commentsCategories: Power SupplyShort Content: High efficiency LED uses in illuminating is this century new task, its energy conservation, the security, the service life long overall merit will initiate the new round illumination revolution. In needs to use the battery power supply in the LED flashlight application, how under the use same battery's premise, to lengthen battery's period of revolution? This involves to the power source management question. This article at present the popular several kind of SP6648EU driving circuit, introduces the flashlight LED ... -
Based on rises voltage dropping switch’s LED the illumination driver design
Thursday, February 5th, 2009 at 20:53 | No commentsCategories: Power SupplyShort Content: Although when the output voltage is possibly higher than also possibly is lower than the input voltage, the summit current mode control must continuously rises the voltage dropping switch is a LED driver's good choice. , uses this kind rises the voltage dropping switch to design the driver, the LED voltage's change can change the LED electric current, the LED opening will cause the out-port to produce the high voltage, thus damages the switch. This article will discuss this ... -
Active control white light LED electric current switch manostat
Friday, January 30th, 2009 at 09:53 | No commentsCategories: Power SupplyShort Content: Several years ago, manufacturers also white light LED, but is not the gloomy LED most Taisho to the nominal current hypothesis is 20 mA. Today's white light LED may provide a higher brightness, must therefore work under the higher bias electric current. Must maintain to in the close LED most large quantity definite value's big electric current working condition a LED bias control, needs one new method. Of the bias LED simple, the most commonly used method is connects a ...
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