News

Moving to JavaScript

  Most calculators are now available in VBScript and JavaScript. Thus ensuring that they can be used in Internet Explorer, Netscape, Firefox and other modern browsers. A  Coplanar Waveguide With Ground Calculator has been added and the Calculations spreadsheet has been greatly improved. The formulas have been added for the PCB sample size calculator and the Characteristic Impedance calculator.

Website

   The website takes on yet another new look without getting cluttered or slow loading. The brighter colours in the banner at the top of the page are by William Jeffrey Adam Highton aged 10 years. Well done William, lets hope that you keep contributing to chemandy.com. 

    A page has been added for looking up Preferred Resistor Values to make the use of  the calculators easier and About our calculators has been added to explain their functioning. Also, the whole website is now optimised for Internet Explorer 6.0, Netscape 7.2, Mozilla Firefox 1.5 and Opera 9.25 browsers.

Sales

   We have suspended e-commerce sales temporarily while we relocate. We can still be contacted using Contact Us should you wish to discuss future orders. We will replace e-commerce orders again as soon as practical.

Interesting Write ups

   Our write up on measuring Relative Dielectric Constant should be an eye opener, even to the 'old hands'. Combine this with one of the Microstrip or the Coplanar Waveguide with Ground calculators that can be found in our index of Calculators. Then proving the result by measuring a sample with the aid of the article Measuring Characteristic Impedance and Effective Dielectric Constant of PCB tracks using a Vector Network Analyser  and you can start your next project knowing that the track dimensions will be right! The process is to make make a sample and measure the ε_r, calculate the track dimension, make a track sample and measure it! Positive proof that you have the right dimensions