[Allan Schwartz] decided to document his experience using Fritzing to design, fabricate, and test a custom Arduino shield PCB, and his step-by-step documentation makes the workflow very clear.

In the center of the breadboard you can see the cheap and ubiquitous HC-05 Bluetooth module ... Fritzing schematic on the post uses a voltage divider. The software end of things consists of an ...

As you may well know, Arduino’s analog inputs can be used to measure DC voltage between 0 and 5V (when using the standard 5V analog reference voltage) and this range can be increased by using two ...