這是一個數碼管代碼生成器,有利于幫助大家編譯數碼管代碼,。
上傳時間: 2013-10-14
上傳用戶:u789u789u789
歸納了555定時器的功能,給出了一種易于記憶的簡化模型,同時就其構成的無穩態觸發器、單穩態觸發器及雙穩態觸發器等應用電路的特點進行了探討。
上傳時間: 2013-12-22
上傳用戶:xiaoxiang
單片機交通燈——共陽管
上傳時間: 2013-10-25
上傳用戶:changeboy
05_MCS-51的內部功能部件
上傳時間: 2013-10-20
上傳用戶:baiom
介紹一種基于單片機控制的數控直流電流源。系統以AT89S52單片機為控制核心,由V/I轉換電路、DA轉換、AD轉換等模塊組成。通過按鍵設定電流值,并在LCD上同步顯示預設值,利用模擬閉環控制原理實現V/I轉換功能,采樣電阻兩端的電壓值送給A/D轉換電路,經單片機換算成實際輸出電流值,并利用LCD顯示,供用戶參考。經測試,本系統穩定性好、精度較高、操作簡單、人機界面友好。在科學研究和設備生產中,能夠廣泛應用到這種可靠性高、操作簡單的數控電流源,不僅能夠提高設備的性能,同時能夠縮短研發周期,本系統具有較高的實用性。
上傳時間: 2013-11-06
上傳用戶:csgcd001
流水燈、數碼管、1602液晶、鍵盤、密碼、溫度、紅外、AD轉換、I2C SPI總線等等的8051仿真實驗都可以在這塊實驗板上實現它的功能!想學單片機的同學有福了!如果還想要程序仿真程序和教程的話,再來聯系我吧!
上傳時間: 2013-10-11
上傳用戶:GHF
現有基于MAX7219芯片的數碼管驅動電路只適用于小尺寸LED,為擴展其使用范圍,在介紹動態顯示芯片MAX7219功能的基礎上,提出了一個基于該芯片的8位高亮度8英寸數碼管驅動電路。電路保留了MAX7219芯片的功能強大、編程簡單等優點,通過74LS273鎖存器和ULN2803達林頓驅動器,實現了對任意大尺寸數碼管提供較高電壓和電流驅動的靜態顯示,并亮度可調。 Abstract: The existing display-driving circuit based on MAX7219 was only applicable to small-size LED. To expand its use, based on the function introduction of dynamic display chip MAX7219, a display-driving circuit for high-brightness 8-bit LED with the size of 8-inch was proposed. The advantages of MAX7219 were retained, such as powerful function and simple programming. Static display with adjustable brightness for large-size LED with higher voltage and current was achieved with the help of 74LS273 and ULN2803.
上傳時間: 2013-10-23
上傳用戶:31633073
LAXDK4.1P是多功能數字處理器,所有功能都通過雙DSP處理實現。獨立處理芯片實現全功能的參量均衡,精確分頻,輸出限幅。內置一個DSP效果器,包含兩個獨立的可編程引擎,分別處理回聲、混響效果,實現無窮的效果組合。并且提供精確快速的反饋抑制功能。3路線路輸入、背景音樂(BGM)功能,并帶有同步視頻切換。音樂通道配置7段全參量均衡適應千變萬化的應用環境。話筒通道7段全參量均衡,配合優質話放電路帶來清晰干凈的演唱效果。超低音分頻實現斜率、濾波器、上下限頻點的全部可調,并配置3段參量均衡使調試更得心應手。獨立中置輸出通道,輸出話筒直達聲,并配置3段參量均衡大大提升演唱人聲的表現能力。
上傳時間: 2013-10-26
上傳用戶:herog3
提出了一種以S3C2440A為核心處理器的銀行評價器的設計方案,并結合XILINX公司的XL95144XL型CPLD,輔助S3C2440A,實現該銀行評價器的各部分功能以及系統信號之間的相互協調。該評價器在系統設計上采用液晶屏顯示,代替了以往簡單的數碼管電路的顯示模式,在視覺上給人以全新的享受。同時,評價器增加了新的網絡供電方式,只要將評價器連接上網絡就可以正常工作,方便了客戶的使用。總之,此款銀行評價器采用了嵌入式系統的設計方案,大大豐富了系統功能,實現一個銀行評價器設計的新突破。 Abstract: S3C2440A of SamSung company is the core component of the embedded system. A design of bank assessor based on S3C2440A was provided in this paper. It used XL95144XL combined with S3C2440A to realize all the functions and coordination with system signals. This bank assessor used LCD to display instead of the former simple digital display and provided a new seusuous enjoment. Meanwhile,it provided a new method of network power supply,that the bank assessor could regularly work once it connected to the network,which is convenient for customers to use. In a word,this assessor takes embedded system,enriches the system’s functions and reclizes a new breakout.
標簽: S3C2440A
上傳時間: 2013-11-03
上傳用戶:taa123456
該系統由單片機89S52控制模塊,程控寬帶放大模塊,整形模塊,FPGA內頻率、相位差測量模塊等構成,采用等精度測頻法測出頻率和周期,可測量有效值為0.01~5V,頻率范圍1Hz~20MHz信號的頻率、周期信號,精度高達10-6。采用計數法測量相位差,該系統可測量有效值0.5~5V,頻率10Hz~100kHz信號的相位差,精度為1°。系統功能由按鍵控制,測量結果實時顯示,人機界面友好。 Abstract: The system consists of the following functional blocks:89S52microcontroller controlling module,programmable amplifier module,comparator module,frequency and phase difference testing module in the FPGA.The system use the equal accuracy frequency-examining technique it measures frequency and circle of signal which its ranges is from1Hz to20MHz and the amplitude of which its range is from0.01Vrms to5Vrms,precision is up to10-6.Using of count method,the system detects the phase difference of signal,the amplitude of whic its range is from0.5Vrms to5Vrms and the frequency of which its ranges is from10Hz to100kHz,precision is up to1°,The system functions is controlled by certain keys,measurement results are displayed in real-time and it is friendly interface.
上傳時間: 2013-11-04
上傳用戶:CHINA526