Linear Technology’s DC/DC step-down μModule®regulators are complete switchmode power supplies in asurface-mount package. They include the DC/DC controller,inductor, power switches and supporting circuitry.These highly integrated regulators also provide an easysolution for applications that require negative outputvoltages. In other words, these products can operate asinverting buck-boost regulators. As a result, the lowestpotential in the circuit is not the standard 0V, but –VOUT,which must be tied to the μModule regulator’s GND. Allsignals are now referred to –VOUT.
標(biāo)簽: Module 如何制作 降壓穩(wěn)壓器 輸入輸出
上傳時(shí)間: 2013-10-22
上傳用戶:ztj182002
In predominantly digital systems it is often necessaryto include linear circuit functions. Traditionally, separatepower supplies have been used to run the linear components(see Box, “Linear Power Supplies—Past, Present,and Future”).
標(biāo)簽: Designing Operation Circuits Linear
上傳時(shí)間: 2013-11-04
上傳用戶:sdq_123
#include<reg51.h>
上傳時(shí)間: 2013-11-01
上傳用戶:liujinzhao
TLC2543是TI公司的12位串行模數(shù)轉(zhuǎn)換器,使用開關(guān)電容逐次逼近技術(shù)完成A/D轉(zhuǎn)換過程。由于是串行輸入結(jié)構(gòu),能夠節(jié)省51系列單片機(jī)I/O資源;且價(jià)格適中,分辨率較高,因此在儀器儀表中有較為廣泛的應(yīng)用。 TLC2543的特點(diǎn) (1)12位分辯率A/D轉(zhuǎn)換器; (2)在工作溫度范圍內(nèi)10μs轉(zhuǎn)換時(shí)間; (3)11個(gè)模擬輸入通道; (4)3路內(nèi)置自測(cè)試方式; (5)采樣率為66kbps; (6)線性誤差±1LSBmax; (7)有轉(zhuǎn)換結(jié)束輸出EOC; (8)具有單、雙極性輸出; (9)可編程的MSB或LSB前導(dǎo); (10)可編程輸出數(shù)據(jù)長度。 TLC2543的引腳排列及說明 TLC2543有兩種封裝形式:DB、DW或N封裝以及FN封裝,這兩種封裝的引腳排列如圖1,引腳說明見表1 TLC2543電路圖和程序欣賞 #include<reg52.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int sbit clock=P1^0; sbit d_in=P1^1; sbit d_out=P1^2; sbit _cs=P1^3; uchar a1,b1,c1,d1; float sum,sum1; double sum_final1; double sum_final; uchar duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; uchar wei[]={0xf7,0xfb,0xfd,0xfe}; void delay(unsigned char b) //50us { unsigned char a; for(;b>0;b--) for(a=22;a>0;a--); } void display(uchar a,uchar b,uchar c,uchar d) { P0=duan[a]|0x80; P2=wei[0]; delay(5); P2=0xff; P0=duan[b]; P2=wei[1]; delay(5); P2=0xff; P0=duan[c]; P2=wei[2]; delay(5); P2=0xff; P0=duan[d]; P2=wei[3]; delay(5); P2=0xff; } uint read(uchar port) { uchar i,al=0,ah=0; unsigned long ad; clock=0; _cs=0; port<<=4; for(i=0;i<4;i++) { d_in=port&0x80; clock=1; clock=0; port<<=1; } d_in=0; for(i=0;i<8;i++) { clock=1; clock=0; } _cs=1; delay(5); _cs=0; for(i=0;i<4;i++) { clock=1; ah<<=1; if(d_out)ah|=0x01; clock=0; } for(i=0;i<8;i++) { clock=1; al<<=1; if(d_out) al|=0x01; clock=0; } _cs=1; ad=(uint)ah; ad<<=8; ad|=al; return(ad); } void main() { uchar j; sum=0;sum1=0; sum_final=0; sum_final1=0; while(1) { for(j=0;j<128;j++) { sum1+=read(1); display(a1,b1,c1,d1); } sum=sum1/128; sum1=0; sum_final1=(sum/4095)*5; sum_final=sum_final1*1000; a1=(int)sum_final/1000; b1=(int)sum_final%1000/100; c1=(int)sum_final%1000%100/10; d1=(int)sum_final%10; display(a1,b1,c1,d1); } }
上傳時(shí)間: 2013-11-19
上傳用戶:shen1230
#include <iom16v.h> #include <macros.h> #define uchar unsigned char #define uint unsigned int uchar num,miao,fen,shi,miaoge,miaoshi,fenge,fenshi,shig
標(biāo)簽: MEGA 16 電子時(shí)鐘 仿真圖
上傳時(shí)間: 2013-10-14
上傳用戶:sc965382896
#include<iom16v.h> #include<macros.h> #define uint unsigned int #define uchar unsigned char uint a,b,c,d=0; void delay(c) { for for(a=0;a<c;a++) for(b=0;b<12;b++); }; uchar tab[]={ 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,
標(biāo)簽: AVR 單片機(jī) 數(shù)碼管
上傳時(shí)間: 2013-10-21
上傳用戶:13788529953
#include<reg51.h> //包含單片機(jī)寄存器的頭文件 /******************************************************* 函數(shù)功能:主函數(shù) (C 語言規(guī)定必須有也只能有1 個(gè)主函數(shù)) ********************************************************/ void main(void) { while(1) //無限循環(huán) { P1=0xff; // P1=1111 1111B,熄滅LED P0=P1; // 將 P1 口狀態(tài)送入P0 口 P2=P1; // 將 P1 口狀態(tài)送入P2 口 P3=P1; // 將 P1 口狀態(tài)送入P3 口
上傳時(shí)間: 2013-10-26
上傳用戶:離殤
對(duì)應(yīng)程序: #include<reg52.h> #define uint unsigned int #define uchar unsigned char uchar code tab[]={ 0x81, 0x42, 0x24, 0x18, }; void delay(uint z) { uint i,j; for(i=z;i>0;i--) for(j=120;j>0;j--); } void init() { P0=0x00; }
上傳時(shí)間: 2014-01-17
上傳用戶:ruan2570406
目錄: 1. Character Type Functions - 字符類型函數(shù) 2. Standard C Input/Output Functions - 標(biāo)準(zhǔn)輸入輸出函數(shù) 3. Standard Library Functions - 標(biāo)準(zhǔn)庫和內(nèi)存分配函數(shù) 4. Mathematical Functions - 數(shù)學(xué)函數(shù) 5. String Functions - 字符串函數(shù) 6. BCD Conversion Functions - BCD 轉(zhuǎn)換函數(shù) 7. Memory Access Functions - 存儲(chǔ)器訪問函數(shù) 8. Delay Functions - 延時(shí)函數(shù) 9. LCD Functions - LCD函數(shù) 10. LCD Functions for displays with 4x40 characters - 4×40 字符型LCD函數(shù) 11. LCD Functions for displays connected in 8 bit memory mapped mode -以8 位外部存儲(chǔ) 器模式接口的LCD顯示函數(shù) 12. I2C Bus Functions - I2C 總線函數(shù) 13. National Semiconductor LM75 Temperature Sensor Functions - LM75 溫度傳感器函數(shù) 14. Dallas Semiconductor DS1621 Thermometer/Thermostat Functions - DS1621 溫度計(jì)函 數(shù) 15. Philips PCF8563 Real Time Clock Functions - PCF8563 實(shí)時(shí)時(shí)鐘函數(shù) 16. Philips PCF8583 Real Time Clock Functions - PCF8583 實(shí)時(shí)時(shí)鐘函數(shù) 17. Dallas Semiconductor DS1302 Real Time Clock Functions - DS1302 實(shí)時(shí)時(shí)鐘函數(shù) 18. Dallas Semiconductor DS1307 Real Time Clock Functions - DS1307 實(shí)時(shí)時(shí)鐘函數(shù) 19. 1 Wire Protocol Functions - 單線通訊協(xié)議函數(shù) 20. Dallas Semiconductor DS1820/DS1822 Temperature Sensors Functions - DS1820/1822 溫度傳感器函數(shù) 21. SPI Functions - SPI 函數(shù) 22. Power Management Functions - 電源管理函數(shù) 23. Gray Code Conversion Functions - 格雷碼轉(zhuǎn)換函數(shù)
上傳時(shí)間: 2013-10-22
上傳用戶:歸海惜雪
#ifndef __485_C__ #define __485_C__ #include #include #define unsigned char uchar #define unsigned int uint /* 通信命令 */ #define __ACTIVE_ 0x01 // 主機(jī)詢問從機(jī)是否存在 #define __GETDATA_ 0x02 // 主機(jī)發(fā)送讀設(shè)備請(qǐng)求 #define __OK_ 0x03 // 從機(jī)應(yīng)答 #define __STATUS_ 0x04 // 從機(jī)發(fā)送設(shè)備狀態(tài)信息 #define __MAXSIZE 0x08 // 緩沖區(qū)長度 #define __ERRLEN 12 // 任何通信幀長度超過12則表示出錯(cuò) uchar dbuf[__MAXSIZE]; // 該緩沖區(qū)用于保存設(shè)備狀態(tài)信息 uchar dev; // 該字節(jié)用于保存本機(jī)設(shè)備號(hào) sbit M_DE = P1^0; // 驅(qū)動(dòng)器使能,1有效 sbit M_RE = P1^1; // 接收器使能,0有效
標(biāo)簽: 485 RS 51單片機(jī) 通訊程序
上傳時(shí)間: 2014-12-26
上傳用戶:604759954
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