A few simple PCB design guidelines for creating better board layouts
Build Electronic Circuits Blog
A step-by-step PCB design tutorial on how to design a PCB layout in Eagle
You don’t need fancy equipment to do SMD soldering at home. You can easily do it using a soldering iron. SMD stands for Surface Mount Device and is components that you solder on the surface of a circuit board. Let me guide you through how to do SMD soldering with a soldering iron.
Tips to minimize the chance of errors before PCB manufacturing
Two simple examples of how to use Ohms law
A list with a brief description of online resources that offer free electronic circuits