Long time readers know I like to test compact and, where possible, low-cost equipment. Recently I found another tool to add to my backpack when I get back on the road. Seven years ago, wanting a ...

The Wi-Spy is a 2.4-GHz spectrum analyzer that s about the size of a small USB flash drive. According to its manufacturer, MetaGeek LLC, it s the smallest such analyzer in the world and it only costs ...

A free software upgrade from Signal Hound offers a single graphical user interface to control the SA series of USB-powered spectrum analyzers and the TG series of tracking generators, providing ...

RTL-SDR, the USB TV tuner turned software-defined radio is an amazing device, capable of listening to nearly anything from 25MHz to 1750MHz, fits in your pocket, and costs about $20. Even more ...

You would think the hard part about creating a spectrum analyzer using a pint-sized ATTiny85 would be the software. But for [tuenhidiy], we suspect the hard part was fabricating an array of 320 LEDs ...