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电子时钟
电子时钟程序，简洁明了，原创请勿抄袭
适用于stc15单片机(Electronic clock program)
- 2018-02-09 16:26:16下载
- 积分：1
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单片机实现12位多路DAC数模转换程序MCP4728-ok
Microchip公司的MCP4728是一个带有非易失性存储器(EEPROM)的四路、12位电压输出的数模转换器(DAC)，STC15系列单片机实现12位多路DAC数模转换程序。(Quad-channel, 12-bit, non-volatile, voltage ouput DAC with EEPROM, internal Vref and I2C interface. AEC-Q100 qualified.)
- 2020-08-17 14:18:22下载
- 积分：1
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Vending_machines
在PIC18f452单片机上运行的自动贩卖机的程序。实物有两个按键，用LCD1602显示。(MCU running at PIC18f452 vending machine program. There are two buttons in kind, with LCD1602 display.)
- 2010-02-19 20:43:02下载
- 积分：1
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clock
本程序利用51单片机的定时器中断产生时间信号，同时具有通过按键调节时间的功能，还可设置闹钟(This procedure using 51 single-chip timer interrupt time signal, but also has the functions via buttons adjust the time, but also set the alarm)
- 2011-07-27 19:20:57下载
- 积分：1
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essai
chenillard en code c pour pic18f
- 2011-12-15 16:19:09下载
- 积分：1
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dsn
自行车的里程表。基于51单片单片机最小系统开发的(The bike' s odometer. Developed based on 51 single-chip microcontroller minimum system)
- 2012-12-27 10:33:43下载
- 积分：1
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飞驰人生
说明： 使用了成品遥控车的遥控与接受模块，基于STC89C52RC,模拟PWM输出控制车速，五个前进挡，两个倒挡(The remote control and acceptance module of the finished remote control vehicle is used. Based on STC89C52RC, the output of PWM is simulated to control the speed of the vehicle. There are five forward gears and two reverse gears.)
- 2020-06-18 10:00:01下载
- 积分：1
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BlueBoard_schematics_V1R1-3
lpc2148_development board schematic
- 2013-04-02 14:09:14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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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
