电动执行器的CAD外型图，方便设计人员设计自动系统执行机构时使用。
cad of electric actuator,convenient to use when designning (2013-07-03, Windows_Unix, 154KB, 下载1次)
1、制作霓虹灯闪光花样控制器：
常用的两种类型高压霓虹灯闪光花样控制器常因凸轮磨损、铜板磨损或电机损坏而不能正常工作，还因其为低速电机机械传动不能调速，限制了它的灵活性。图中所示的霓虹灯发光花样控制电路具有寿命长，逻辑功能多，成本低（只有机械控制的40 ），结构简单等优点。
此电路能控制1、2、3、4个字霓虹灯依次点亮，即“图案展开”；4、3两个字依次熄灭，即“图案收回”；在第一个字亮的基础上，第1、2、3、4个字依次独立点亮一次，然后从头循环。
2、电路原理：
IC5为时基集成电路组成脉冲振荡器，为IC1十进制计数/分配器提供时钟脉冲。IC1 10个输出Q0~Q9组成双四路输出电路，用来控制IC3、IC4四二端“与”门电路不同输入与门组合，使4路霓虹灯按次序闪亮发光。此电路所控制的4路霓虹灯发光状态中，至少有一字亮，避免了一片漆黑的不良后果。另外可根据需要，讲上述4路控制扩展成5路、6路或更多路。图中用灯（P1、P2、P3、P4）代表高压霓虹灯变压器。
A production of neon flash pattern controller:
The commonly used two types of high-pressure neon flash pattern controller due to cam wear, copper, wear or motor damage, but not working properly, but also because of its low-speed motor mechanical transmission can not be governor, limiting its flexibility. The neon light-emitting pattern control circuit shown has the advantage of long life, the logic function, low cost (only 40 of the mechanical control), and a simple structure.
This circuit can control 1, 2, 3, 4 words to the neon lights were lit, and that "the pattern expand 4,3 word turn off, ie," the pattern of recovery " in the first word of the brightest on the basis of a , 2,3,4 a word followed by independent light, and then scratch cycle.
2, the circuit schematic:
The IC5 time base integrated circuit composed of the pulse oscillator, the clock pulse for IC1 decimal count/distributor. IC1 10 outputs Q0 ~ Q9 is composed of a dual-quad output circuit used to control t (2012-05-09, Windows_Unix, 873KB, 下载4次)
计算机逆向工程及可视化模型浏览器，可浏览off,stl,wrl,ply等文件格式。
Computer model of reverse engineering and visual browser, visit off, stl, wrl, ply and other file formats. (2011-08-10, Windows_Unix, 901KB, 下载76次)