Last update:


  Tools and Calculators
Site Map Location FAQ

PCB Design
PCB Manufacturing
PCB Assembly
Company Info
Contact Us



Tools and Calculators
Thermal Analysis
CAD Programs






Design Calculators and Reference Data

Part Finder 

Ball Grid Array Pad definitions
Merix DFM Manual
Intel Packaging Data book
SMEMA Standards
Material Properties Database
Doug Brooks' PCB layout articles and utilities
Bogatin's Signal Integrity Articles
Dr Johnson's High Speed Articles
Microstrip Analysis/Synthesis Calculator
PCB Trace Width Calculator
Rogers Flex Analysis Program
Rogers Impedance Calculator


Online Interactive Tutorials:

Differential Impedance Calculator
Differential Pairs
Transmission Lines

RAMPinc's Library Resources
Polar's Impedance calc
UltraCad's Calculators
Hadco's Impedance Calc
Conversion program (download)


Gerber Viewers:

GC-Prevue    http://www.graphicode.com
Viewmate     http://www.lavenir.com
CamCAD       http://www.camcad.com
CAM350      http://www.ecam.com
CAMCAD      http://www.rsi-inc.com
Valor Universal Viewer    http://www.valor.com 


Other viewers:

 VOLOVIEW EXPRESS ftp.autocad.com (15MB download)
Allegro Viewer

Roll Tap Drill Sizes Spreadsheet (MS Excel 2000) or HTML Page





A pastor, a doctor and an engineer were waiting one morning for a particularly slow group of golfers. The engineer fumed, "What's with these guys? We must have been waiting for 15 minutes!" The doctor chimed in, "I don't know, but I've never seen such ineptitude."


The pastor said, "Hey, here comes the greens-keeper. Let's have a word with him."


"Hi George. Say, what's with that group ahead of us?! They're rather slow, aren't they?"

The greens-keeper replied, "Oh, yes, that's a group of blind firefighters. They lost their sight saving our clubhouse from a fire last year, so we always let them play for free anytime."


The group was silent for a moment.


The pastor said, "That's so sad. I think I will say a special prayer for them tonight."

The doctor said, "Good idea. And I'm going to contact my ophthalmologist buddy and see if there's anything he can do for them."


The engineer said, "Why can't these guys play at night?"












Hit Counter

Copyright 2004 PCB Wizards.COM
 Back Home Up Next