This is an FPGA

四位拨妞开关作为输入，当输入值变化时将其转化成两位输出(The four DIP Niu switch as an input, when the input value changes, be converted into two output)

FPGA编写的三角波发生器，可以产生100HZ～500KHZ以上的三角波，波形稳定(FPGA prepared triangular wave generator, can produce more than 100HZ ~ 500KHZ triangle wave, waveform stability)

基于DE2开发板的VGA显示模块，仅供大家参考-DE2 development board based on the VGA display module, for your reference

rda1846 + pic18f2552 usb circuit schematic.

说明：  基于无源蜂鸣器和矩阵按键的电子琴系统设计(design of Electronic Piano System Based on Passive Buzzer and Matrix Key)

This is a divider, which is depicted as well. It is a programming language Vhdl.

verilog 或门程序 初学者必备。。。。。。。。。。。。(verilog )

ADS7809是Burr-Brown公司推出的高精度AD采集芯片。它采用5V单电源供电,内含16位 逐次逼近寄存器,采样精度高,功耗小。 用Verilog实现其配置(ADS7809 is a Burr-Brown Introduces High Precision AD capture chip. It uses a single 5V supply, with 16-bit successive approximation register, sampling and high precision, low power consumption. To achieve its configuration with the Verilog)

买的Altra公司的一款Max II EPM1270T144的电路板，其中的一个用Verilog HDL 编写的驱动数码管的程序，完全可用。-Altra Inc. bought a Max II EPM1270T144 circuit board, one written in Verilog HDL using the digital controls process-driven, fully available.

说明：  利用Verilog语言实现PID增量式控制，输出占空比(Using Verilog language to realize PID incremental control and output duty cycle)