本电路采用AD698 LVDT信号调理器，包含一个正弦波振荡器和一个功率放大器，用于产生驱动原边LVDT的激励信号。AD698还可将副边输出转换为直流电压。AD8615轨到轨放大器缓冲AD698的输出，并驱动低功耗12位逐次逼近型模数转换器(ADC)。系统动态范围为82 dB，带宽为250 Hz，非常适合精密工业位置和计量应用。
This circuit uses the AD698 LVDT signal conditioner, which includes a sine wave oscillator and a power amplifier to generate the excitation signal that drives the primary LVDT. The AD698 also converts the secondary output to a DC voltage. The AD8615 rail-to-rail amplifier buffers the output of the AD698 and drives a low-power, 12-bit successive approximation analog-to-digital converter (ADC). With a system dynamic range of 82 dB and a bandwidth of 250 Hz, it is ideal for precision industrial location and metrology applications. (2018-08-15, C51, 452KB, 下载17次)
MQ-2模块功能介绍，包括源代码，硬件资料，参数细节，参考电路图
MQ-2 module function introduction, including source code, hardware information, parameter details, reference circuit diagram (2018-07-01, C51, 2322KB, 下载12次)
AD9850正弦波程序-昆特管频率信号发生器
AD9850 sine wave signal generator program - Kuhnt tube (2018-02-27, C51, 451KB, 下载4次)
INA219电流传感器驱动程序，C51单片机可用，
INA219 Current sensor program (2017-12-01, C51, 85KB, 下载90次)
51单片机通过74HC595控制ULN2003带动步进电机
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本文主要介绍了基于AT89C51的测温系统，采用温度传感器DS18B20和LCD1602，可实现对温度的采集与显示，并可任意设定上下限报警温度，自动报警。
This article mainly introduces the temperature measurement system based on AT89C51, adopts temperature sensor DS18B20 and LCD1602, can realize the temperature collection and display, and can arbitrarily set the upper and lower limit alarm temperature, automatic alarm. (2017-06-01, C51, 164KB, 下载5次)
热释电红外传感器，它的制作简单、成本低、安装比较方便，而且防盗性能比较稳定，抗干扰能力强、灵敏度高、安全可靠。这种防盗器安装隐蔽，不易被盗贼发现，便于多用户统一管理。本设计包括硬件和软件设计两个部分。硬件部分包括单片机控制模块、红外探头模块、驱动执行报警模块、LED控制模块等部分组成。处理器采用51系列单片机STC89C52，程序使用C语言编写。
The pyroelectric infrared sensor has the advantages of simple manufacture, low cost, convenient installation, stable anti-theft performance, strong anti-interference ability, high sensitivity, safety and reliability. The anti-theft device is hidden and not easy to be found by thieves. The design includes two parts: hardware and software design. The hardware part includes MCU control module, infrared probe module, driver alarm module, LED control module and other components. The processor uses 51 Series MCU STC89C52, the program uses the C language to write. (2017-03-20, C51, 49724KB, 下载19次)