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51单片机的eeprom和iic通信软件模拟程序
说明： 51单片机的eeprom和iic通信软件模拟程序(Eeprom and IIc communications in 51 single chip machines)
- 2020-06-19 12:00:06下载
- 积分：1
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b00st
：文章在对双BOOST DC-AC单级正弦波逆变电路工作原理进行分析的基础上，采用SPWM调制技术对其进行了仿真和试验研究，给出了相关结果。实践表明该电路可以实现高频功率变换下的单级升压工频逆变输出。(b00st)
- 2009-10-17 21:41:14下载
- 积分：1
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BRTTimer0-interrup
stc单片机BRT编程脉冲输出-Timer0中断取反IO输出(stc SCM BRT-Timer0 interrupt programming pulse output negated IO output)
- 2013-08-05 23:15:35下载
- 积分：1
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ATMEGA128_PWM
ATMEGA128 可以同时改变pwm的频率和占空比，对理解PWM很有处。(ATMEGA128 can change the pwm frequency and duty cycle, and understanding of the PWM is useful at.)
- 2012-02-11 15:48:18下载
- 积分：1
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spi
SPI通信---pic18系列单片机编程实现使用MAX7219控制4位7段数码管显示数字：0 1 2 3。(SPI communication--- pic18 series microcontroller programming using the MAX7219 control four 7-segment LED display digits: 0123.)
- 2014-01-20 15:53:58下载
- 积分：1
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pinlvbujin
g2553步进频率的实现，100hz实现，数据成表很准(g2553 step frequency to achieve 100Hz to achieve the data into a table very accurate)
- 2013-05-06 23:38:45下载
- 积分：1
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shuanglushuzihecheng
摘要
电能表作为用电量的测量工具广泛的应用于各种场合。在电能表校表系统中,需要的最基本的输入信号源是高精度双路正弦信号源,并要求可对其频率、相位、幅值进行调节,来对电能表进行校准。
基于单片机的程控信号源设计，运用数字调相、数字调幅和数字调频等技术，要求实现相位、幅度、频率的高精度程控调节。本文设计了一种利用锁相环频率合成技术和数字波形合成技术组成的程控低频正弦波信号发生器，并给出了调幅、调频、调相的实用电路，频率调节通过改变8253计数器的分频系数来实现；相位调节由51单片机预置计数器的计数初值来完成，幅度的调整通过改变DAC1210II的参考电压来实现，使频率分辨率达0.01Hz,相位调节精度达0.1°，并介绍电路中的主要芯的功能及使用。输出正弦波频率和幅值的精度高，稳定性好，失真度低，电路简单、可靠、便于程控。
关键词：数字合成信号源；程控；调幅；调频；移相；
(Abstract
Meter consumption as the size of the measurement tool is widely used in various occasions. In single-phase power meter verify system, the most basic needs of the input signal is the source of two-way high-precision sine signal source, and may request its frequency, phase, amplitude in a certain step to adjust to the imitate of the actual electricity load with a right meter calibration.
Design of the programmable signal supply controlled source，which based on the MCU，including digital phase adjustment，distal amplitude adjustment，digital frequency adjustment etc．The system should achieve high quality digital adjustment of phase, amplitude and frequency. This paper describes the use of a PLL frequency synthesizer technology, and digital wave form synthesis technology consisting of program-controlled low-frequency sine wave signal issued devices, and applies the amplitude， frequency， phase of practical circuit. Frequency can be adjusted through a change in the 8253 counter-frequ)
- 2021-04-08 20:19:00下载
- 积分：1
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红外-STC51
使用STC51所带的红外接收模块实现红外功能，并且在1602上面有一个简单的交互。(The infrared function is implemented using the infrared receiver module of the STC51, and there is a simple interaction on the 1602.)
- 2020-06-18 16:40:02下载
- 积分：1
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dianti
基于凌阳61板的五层电梯模型C语言程序，经试验成功(Sunplus based on the five-story elevator plate 61 model C Language Program Following a successful trial,)
- 2007-11-11 16:59:53下载
- 积分：1
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模拟量电压电流采集AD转换变送器RTU模块
标题:
如何实现0-10v或者4-20ma模拟量的高精度采集传输
标签:
0-5v,0-10v,0-20ma,4-20ma,模拟量采集,adc模数转换,电压电流采集,温湿度采集,称重模块,变送器
文档介绍:
本文基于综科智控开关量模拟量混合模块介绍如何实现0~5V，0~10V，0~20ma，4~20ma模拟量信号的高精度ADC采集转换，采集精度高达24bit，最多可以实现8通道同时采集转换，该模块同时还配有8路光耦隔离开关量输入以及8路光耦隔离晶体管输出，功能强大，适合于对精度和稳定性要求较高的工业或者物联网场合。(Title:
How to achieve high precision acquisition and transmission of analog data of 0-10V or 4-20mA
Label:
0-5V, 0-10V, 0-20mA, 4-20mA, analog data acquisition, ADC analog to digital conversion, voltage and current acquisition, temperature and humidity acquisition, weighing module, transmitter
Document introduction:
This paper introduces how to realize high precision ADC acquisition and conversion of 0~5V, 0~10V, 0~20ma, 4~20ma analog signals based on the integrated module of fully mechanized intelligent control switching analog quantity. The acquisition precision is as high as 24bit, and the 8 channel simultaneous acquisition and conversion can be realized at most. The module is also equipped with 8 optocoupler isolation switches and 8 optocoupler isolating crystals The tube output is powerful and suitable for industrial or Internet of things with high accuracy and stability.)
- 2018-07-08 18:15:54下载
- 积分：1
