The project was based on a PIC16F877A microcontroller for the basic purpose of encouraging radio amateurs to build their own SWR meter at a very cheap price compared to high-priced ready made. Two ...

SWR or standing wave ratio is the ratio of the amplitude of a partial standing wave at an antinode (maximum) to the amplitude at an adjacent node (minimum), in an electrical transmission line. The SWR ...

Wondering how to get the best performance out of your homebrew WiFi antennae? This homebuilt SWR meter will help you measure and match the impedance of your antennae with your source. A good match ...

Trail communication is key, whether your spotter is telling you where to put your tires or when you are trying to reach base camp to tell them you are upside-down. That is why we require a Citizens ...