As we find helpful resources for PCB Prototyping, design and manufacturing, we will be posting them on our blog to share them with our users.

PCB prototyping Resistor Calculator
Image Source: has made available many free online calculators with lots of information and formulas for users to get quick answers to what they are looking for.  We have found the Resistor Color Code Calculator to be a useful one.  Please visit to use the calculator and find others.

If you find a free printed circuit board issue that you would like for us to share with our users, please let us know by emailing info[at]