140NOM25200 无线通讯
D/A转换模块
本系统中的数模转换电路由DAC0832、两级低漂移的运放μA714及VREF电路组成。DAC0832和运放U3A将CPU发出的8位二进制数据转换成0～-5 V的电压，然后经运放U3B反向放大2倍，以得到0～10 V电压。因此，该DAC的转换分辨率为10/(28-1)=0.04 V，即CPU输出给DAC的数据变化为1 Bit，DAC输出电压的变化为0.04 V。VREF电路为DAC提供基准电压，调节R5A，可使基准电压保持为5 V。
1.4显示与键盘模块
当输出电压经R13限流和R14取样后，即可送如TLC2453-1进行模数转换。TLC2453-1为11通道、12位串行A/D转换器，具有12位分辨率，转换时间为10μs，有11个模拟输入通道，3路内置自测试方式，采样率为66 kbps，线性误差±1LSBmax，同时带有转换结果输出EOC，并可单、双性输出。通过其可编程的MSB或LSB前导可编程输出数据长度。TLC2453-1的时钟频率选用4.1 MHz，电源输出电压Uo的取样信号从IN0输入，芯片的I/O时钟端、数据输入端、转换数据输出端、片选端分别与AT89S51单片机的P2.3、P2.2、P2.1、P2.0相连，然后经单片机处理后从P0口输出，在经排阻9A472J驱动后送字符型液晶显示屏SMC1602A显示输出电压。电路中AT89S51单片机的晶振频率选用12 MHz，P1.0～P1.3接调压按钮。增加电压时，粗调用按键S1，步进为1 V，细调用S2，步长为0.05 V；减小电压时，粗调用S3，步长为1 V，细调用S4，步调为0.05 V。这样，经过它们的有机结合便可将输出电压调节到所需的电压。
2系统软件设计
3 结束语
本文给出的直流数控稳压电源采用硬件组成的闭环反馈模式来进行稳压。电路中采用共模抑制比高、响应速度快、压摆率高的NE5534作比较器，从而了稳压的可靠性和精度；而采用12位A/D转换模块完成电压的测量，并用LCD液晶显示，则了测量的准确性和直观显示能力。本电路的开机预置输出电压为5 V，并可采用步进方式调节输出电压，小步进为0.05 V。经过测试，本电路的输出电压范围可达到0～18V，额定电流可达到0.5A，可应用于实验教学与工程实践中。
可调稳压电源应用
可调稳压电源产品可广泛应用于国防、科研、大专院校、实验室、工矿企业、电解、电镀、充电设备等。
能为负载提供稳定直流电源的电子装置。直流稳压电源的供电电源大都是交流电源，当交流供电电源的电压或负载电阻变化时，稳压器的直流输出电压都会保持稳定。 直流稳压电源随着电子设备向、高稳定性和高可靠性的方向发展，对电子设备的供电电源提出了高的要求。
当今社会人们的享受着电子设备带来的便利，但是任何电子设备都有一个共同的电路--电源电路。大到超级计算机、小到袖珍计算器，所有的电子设备都在电源电路的支持下才能正常工作。当然这些电源电路的样式、复杂程度千差万别。超级计算机的电源电路本身就是一套复杂的电源系统。通过这套电源系统，超级计算机各部分都能够得到持续稳定、符合复杂规范的电源供应。袖珍计算器则是简单多的电池电源电路。不过你可不要小看了这个电池电源电路，比较新型的电路具备电池能量提醒、掉电保护等功能。可以说电源电路是一切电子设备的基础，没有电源电路就不会有如此种类繁多的电子设备。
由于电子技术的特性，电子设备对电源电路的要求就是能够提供持续稳定、满足负载要求的电能，而且通常情况下都要求提供稳定的直流电能。提供这种稳定的直流电能的电源就是直流稳压电源。直流稳压电源在电源技术中占有十分重要的地位。另外，很多电子爱好者初学阶段首先遇到的就是要解决电源问题，否则电路无法工作、电子制作无法进行，学习就无从谈起。
ORIENTAL MOTOR UPX535M-A VEXTA STEPPING MOTOR 5-PH NO BOX
Oriental Motor UPH596-B Vexta Stepping Motor With Ogura FNB 0.2G-01 Assembly
ORIENTAL MOTOR UPH566HGK-AM 5-Phase Vexta Stepping Motor
ORIENTAL MOTOR UPH566HG2-A-A25 5-Phase Vexta Stepping Motor
ORIENTAL MOTOR UPH566G-A-A25 5-Phase Vexta Stepping Motor
ORIENTAL MOTOR UDX5128 Super Vexta 5 Phase Driver
Oriental Motor UDX511-4N-E 5-Phase Servo Driver Vexta working
Oriental Motor UDX5114N-E 5-Phase Servo Driver Super Vexta Working
ORIENTAL MOTOR UDX5114N SUPER VEXTA 5 PHASE DRIVER
ORIENTAL MOTOR UDX5114 SUPER VEXTA 5 PHASE DRIVER
ORIENTAL MOTOR UDX5107N Super Vexta 5-Phase Motor Driver- insulator damage
Oriental Motor UDX5107N Super Vexta 5-Phase Driver
Oriental Motor UDX5107N 5-Phase Stepping Motor Amplifier Super Vexta Working
ORIENTAL MOTOR UDX5103 Super Vexta 5 Phase Driver
ORIENTAL MOTOR UDX2115 SUPER VEXTA 2 PHASE DRIVER
Oriental Motor UDK5114NW2 5-Phase Servo Driver Vexta Working
Oriental Motor UDK5107NW2 Vexta 5-Phase Driver Working
Oriental Motor UD2115B 2-Phase Driver Super Vexta Reseller Lot of 4 Working
Oriental Motor UD2115 2-Phase Servo Driver Super Vexta Working
Oriental Motor Super Vexta UI215GA Intelligent Driver
Oriental Motor Super Vexta UDX5107N 5-Phase Driver
Oriental Motor Super Vexta UDX5107 5-Phase Driver
Oriental Motor Super Vexta UDK5114N 5-Phase Stepper Motor Driver US Seller
Oriental Motor Super Vexta UDK5114N 5-Phase Driver
Oriental Motor Super Vexta UD519 5 Phase Motor Driver
Oriental Motor Super Vexta UD2115 2-Phase Driver
Oriental Motor Super Vexta Pulse Generator SC8800E
ORIENTAL MOTOR SUPER VEXTA PULSE GENERATOR DRIVE XG6100S XG6-100S
Oriental Motor Super Vexta KXSD50-ALZ AC Servo Driver
Oriental Motor Super Vexta Intelligent Driver UI215GA
Oriental Motor Super Vexta Data Pack, DP-01
ORIENTAL MOTOR SUPER VEXTA AC SERVO DRIVER KX SERIES KXS KXSD50-ALZ KXSD 50-ALZ
ORIENTAL MOTOR SUPER VEXTA AC SERVO DRIVER KX SERIES KXP KXPD30-ABZ KXPD30ABZ
ORIENTAL MOTOR SUPER VEXTA AC SERVO DRIVER KBLD400-C
ORIENTAL MOTOR SUPER VEXTA AC SERVO DRIVER DRIVE KXD30-ABZ KXD30ABZ
ORIENTAL MOTOR SUPER VEXTA AC SERVO DRIVER DRIVE KX SERIES KXS KXSD40-ALZ
ORIENTAL MOTOR SUPER VEXTA AC SERVO DRIVER DRIVE KBLD180-C KBLD180C KBLD-180-C
Oriental Motor Super Vexta 5-Phase Stepping Motor Drive UDK5114NW2-A4 Stepper
ORIENTAL MOTOR SUPER VEXTA 5-PHASE DRIVER UDX5150 * NO BOX*
ORIENTAL MOTOR SUPER VEXTA 5-PHASE DRIVER UDX5103 PCB Y AXIS PM DRIVER 402829
ORIENTAL MOTOR SUPER VEXTA 5-PHASE DRIVER UDX5103 PCB Y AXIS PM DRIVER 402828
Oriental Motor Super Vexta 5-Phase Driver UDK5114N
Oriental Motor Super Vexta 5 Phase Stepper Driver UDX5107N Stepping 115VAC Input
ORIENTAL MOTOR SUPER VEXTA 2-PHASE DRIVER DRIVE UDX2140 UDX-2140
Oriental Motor SMK5160A-AA Synchronous Motor Vexta Working
Oriental Motor SMK237A-A Vexta Synchronous Motor
Oriental Motor SB31-IN Vexta Brake Pack w/ Din base Connector SB31IN IN BOX
Oriental Motor RKD514L-A 5-Phase Servo Driver Vexta Lot of 2 Working
ORIENTAL MOTOR PXC43-02AA-C3 Vexta 2-phase Stepping Motor, 0.9-deg/step, 6V 0.6
ORIENTAL MOTOR PX243-01AA 1.8-DEG 2-PHASE VEXTA STEPPING MOTOR, DC 4V, 0.95A
Oriental Motor PMM33A-MG30 5-Phase Step Motor VEXTA Lot of 4 working
Oriental Motor PMD03C VEXTA Mini Stepping Driver PCB Lot of 11 working
ORIENTAL MOTOR PK599-NBA VEXTA STEPPING MOTOR /
ORIENTAL MOTOR PK5913BW VEXTA 5 PHASE STEP MOTOR, DOUBLE ROUND SHAFT,
Oriental Motor PK569AUA 5-Phase Stepping Motor Vexta
Oriental Motor PK564-NA Vexta 5 Phase 0.72"/Step Stepping Motor
ORIENTAL MOTOR PK564H-A VEXTA STEPPING MOTOR **
ORIENTAL MOTOR PK545-A VEXTA STEPPING MOTOR * IN A BOX*
ORIENTAL MOTOR PK266MA VEXTA STEPPING MOTOR 2 PHASE
ORIENTAL MOTOR PK266-02A 2 PHASE 1.8" VEXTA STEPPING MOTOR, A1008407
ORIENTAL MOTOR PK245-01AA VEXTA STEPPER MOTOR, NIB
Oriental Motor PK245-01A VEXTA 2-PHASE Stepping Motor
ORIENTAL MOTOR PK243A2A-SG18 VEXTA 2 PHASE 0.1 DEGREE STEP DC 0.4A
ORIENTAL MOTOR PK235PA VEXTA STEPPING MOTOR 2-PHASE - - FREE SHIPPING
Oriental Motor PH5913H-NBA VEXTA Stepper Motor
ORIENTAL MOTOR PH566-AM Vexta 5-Phase Stepper Motor
ORIENTAL MOTOR PH544HG1-NA Vexta Stepping Motor
Oriental Motor PH268M-E068 Vexta Stepping Motor
Oriental Motor PH-268-21-C063 Vexta Stepping Motor 9700-2311-01
ORIENTAL MOTOR PH268-21B-C79 VEXTA 5.4V-DC 2PH DC STEPPER ELECTRIC MOTOR B471501
Oriental Motor PH266L-31B-C5 2 Phasen VEXTA Schrittmotor DC 6V 1 , 2 A
Oriental Motor PH266L-31B-C4 2 Phasen VEXTA Schrittmotor DC 6V 1 , 2 A
Oriental Motor PH266-01 Vexta Stepping Motor 1.8 Degree Syringe Assembly Unit
ORIENTAL MOTOR PH265M--31 VEXTA STEPPING MOTOR 2-PHASE 0.9/STEP 52-0284 406578
Oriental Motor PH-265L-04-C6 Vexta Stepping Motor 9700-2129-01
Oriental Motor PH-265L-04 Vexta Stepping Motor 9700-2131-01
Oriental Motor PH265-01 Vexta Stepping Motor 2 SET
Oriental Motor PH2610-E2.9B Vexta Stepping Motor 2-Phase 2.9A
ORIENTAL MOTOR PH2610-02 VEXTA 0.94A STEPPING 12V-DC 2PH ELECTRIC MOTOR B386807
Oriental Motor P4554-NA-A15 5-Phase Stepping Motor Vexta Working
ORIENTAL MOTOR OSD-304U SUPER VEXTA 2-PHASE STEPPING DRIVER 0SD-304U GL
Oriental Motor OSD-304U Super VEXTA 2-Phase Stepper Motor Driver
ORIENTAL MOTOR OM VEXTA AC SERVO MOTOR KBLM460GD-CM 60W 3000RPM
ORIENTAL MOTOR OM VEXTA AC SERVO MOTOR KBLM460GD-CM 4GD5K 60W 3000RPM
ORIENTAL MOTOR OM VEXTA AC SERVO MOTOR KBLM460GD-CM 4GD5K
Oriental Motor KXS240HGI-ALZ Vexta KX AC Servo Kit KXSD-40-ALZ KX3M240HG1-BL
ORIENTAL MOTOR KBLD180-C/KBLD 180-C SUPER VEXTA AC SERVO DRIVER ***NNB***
Oriental Motor KBLD180-C Super Vexta AC Servo Driver KBLD180C
Oriental Motor KBL6180GD-A2M Vexta AC Servo Kit KBLD-180-A KBLM6180GD-AM
ORIENTAL MOTOR FBLD120AW QUANTITY! 115V 3.0A VEXTA BRUSHLESS DC MOTOR DRIVER
ORIENTAL MOTOR EM569-NA Vexta 5-Phase Stepper Motor
ORIENTAL MOTOR EM566-NA Vexta 5-Phase Stepper Motor
Oriental Motor ED Co. Super VEXTA Pulse Generator UG678K Stepper Stepping
ORIENTAL MOTOR DRIVER BLD3024-F -B1VEXTA BRUSHLESS DC MOTOR DRIVER M 24VDC 5A
Oriental Motor DFU1514W-M, 5-Phase Driver, Vexta, 398950
Oriental Motor DFU1514W-M, 5-Phase Driver, Vexta
Oriental Motor DFR1514 5-Phase Servo Driver Vexta Fine Step Working
Oriental Motor DFR1507 5-Phase Driver Vexta Fine Step Working
Oriental Motor DFC5128P-A5 Vexta Stepper Drive Stepping Motor Driver Heat Sink
Oriental Motor DFC1507 5-Phase Stepping Driver Vexta TEL ACT12 Working
Oriental Motor DFC1507 5-Phase Stepping Driver Vexta Lot of 2 working
Oriental Motor DFC1507 5-Phase Stepping Driver Vexta