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AD7789
AD778924位AD转换程序，提供了常用的功能模块，经过实际项目开发，可以应用(AD7789 24bit change)
- 2021-03-26 12:09:13下载
- 积分：1
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plank
输入温度（单位为摄氏度），起始波长和终止波长（单位为微米），采用普朗克公式计算得到黑体的辐射能量。(using numerical integration to calculate blackbody radiation based on Plank theory. the input is temperature in degreeC, and start wavelength and end wavelength in um)
- 2021-04-09 10:18:59下载
- 积分：1
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SQL
can kao shouce (can kao shou ce )
- 2013-12-23 17:21:08下载
- 积分：1
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tx3
EM78P153S+24L01的汇编射频程序(EM78P153S+24 L01 compilation of radio program)
- 2010-11-16 17:02:19下载
- 积分：1
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xianlutongduanqi
线路通断检测器的设计：
1．用压电陶瓷蜂鸣片作为电声元件。
2．用两根导线作为测试探针
3．线路通断是通过测试电阻的大小来判断，有以下三种情况：
（1）若150Ω<Rx<900Ω，则蜂鸣片不发出声响。
（2）若Rx>900Ω或者Rx<150Ω，则蜂鸣片发出间歇式的滴－滴声响。
以上各临界阻值（150Ω和900Ω），允许误差±10％
4．＋15V直流稳压电源需要设计。
(Line-off detector design:
1. Piezoelectric ceramic buzzer as the electro-acoustic components.
2. As a test probe with two wires
3. Lines off by testing the resistance to determine the size, the following three conditions:
(1) If 150Ω <Rx <900Ω, the buzzer is not audible.
(2) If Rx> 900Ω or Rx <150Ω, then the buzzer sent intermittent drip- drip sound.
Above the critical resistance (150Ω and 900Ω), tolerance ± 10
4.+15 V DC power supply need to design.
)
- 2011-06-19 21:49:39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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Arduino
说明： arduino 8*8像素点阵实现代码(Arduino 8*8 Pixel Matrix Implementation Code)
- 2019-01-27 07:26:14下载
- 积分：1
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ds18b20Plcd
温度控制系统.运用ds18b20温度传感器将实时温度送入FPGA中，再将温度显示出来(Temperature control systems. Use ds18b20 temperature sensor into the FPGA in real-time temperature, then the temperature is displayed)
- 2014-04-27 18:39:30下载
- 积分：1
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实验3 按键输入
说明： 正点原子STM32F103精英板按键输入例程(Punctual Atom STM32F103 Elite Board Key Input Routine)
- 2020-06-21 11:20:02下载
- 积分：1
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chuandao12864
串口发送数据，字符，12864接受并显示字符(Serial port to send data, the character, to accept and display the character 12864)
- 2011-08-12 19:01:33下载
- 积分：1
