老外做的软件实现DTMF

脉冲宽度的测量，利用1602液晶显示，和4*4键盘输入，AT89C52单片机控制，实现对长脉冲宽度的测量-Pulse width measurement, the use of liquid crystal display 1602, and 4* 4 keyboard input, AT89C52 single-chip control, realize the long pulse width measurement

51单片机实用子程序库-51 SCM practical subroutine library

数控调频发射器，很好用的哦，我写了好久的，不过大家要先有必要的电子元件哦。-NC FM transmitter, used in good Oh, I wrote a long time, but everyone should have the necessary electronic components Oh.

Epson 150II点阵式打印机电路原理图,PCB图,有四个版本,CPU有LPC764,89C51RD2等,有驱动宽度保护功能.-Dot-matrix printer Epson 150II circuit schematics, PCB diagram, there are four versions, CPU has LPC764, 89C51RD2 and so on, have driven the width of protection.

cstn 1.5 with ST7636的C51测试程序.-cstn ST7636 1.5 with the C51 test procedures.

CYGNAL单片机，C8051FXXX应用例程3-CYGNAL microcontroller, C8051FXXX routines 3

ST7920控制的液晶程序，精心打造，一直方便-ST7920-controlled liquid crystal process, carefully built, has been to facilitate

lm2576S-5 电压变频器，经典电路接发-lm2576S-5 voltage inverter circuit receiving classic

移植好的系统，通过调试－－－－给需要者-Transplantation good system, through the debugger to those who need it----

USB转lpt 68013 驱动方案 USB转lpt 68013 驱动方案-Lpt 68013 Driver USB to USB transfer program lpt 68013 driver program