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3 Feb 2012

geoffg.net writes:

Have you ever wondered exactly what is going on in the 2.4GHz WiFi and ISM band around your house. What channel is it best to set your wireless router to? Why are you getting such poor performance across your WiFi network? Is your neighbour on the same frequency?

Just what is out there? This neat little gadget will sniff the airwaves and give you a graph of the signal strength vs frequency across the entire band. It connects to your computer by USB 2.0 and with the companion Windows software you can display the spectrum or save the raw data to an Excel compatible file for some more number crunching.

It uses just two significant components, a radio module from Cypress Semiconductor and a PIC microcontroller. Total cost to build it should be less than US$30.

This project was inspired by an article by Jason Hecker in the June 2007 issue of Elektor. Thanks Jason.

2.4GHz WiFi & ISM Band Scanner – [Link]

10 Mar 2011

Ariel Rocholl has been working with Seed Studio on an affordable handheld spectrum analyzer called the RF-Explorer.

It’s a sort of Swiss Army Knife for monitoring, testing and diagnosing ISM band digital communications. It currently supports the 433Mhz, 868Mhz or 915Mhz bands and other bands in the works. The RF-Explorer is currently in beta with Seeed Studio. [via]

The ISM Band RF Explorer – [Link]

18 Feb 2011

Semtech has released a line of “power and go” inexpensive data transmitter chips. The new SX1240 and SX1242 ISM-band RF transmitters enable true data-in/RF-out capability, with only an external crystal and antenna impedance matching network needed. [via]

Semtech RF data transmitter chips – [Link]

18 Feb 2010

Miguel build this Handheld 2.4 GHz Spectrum Analyzer insisde an old cell phone case and used the phone’s graphical LCD to display measuring results. This ISM band spectrum analyser is based on CYWM6935 module and ATMega8 mcu. [via]

Handheld 2.4 GHz Spectrum Analyzer – [Link]

6 Nov 2009


Atmel’s ATA874x single-chip UHF ASK/FSK RF transmitter family targets a broad range of proprietary wireless industrial and consumer applications such as metering, alarm systems and home control applications. This new AVR® product family offers RF performance operating in the license-free ISM frequency bands (868 to 928 MHz, 433 MHz, and 315 MHz).

AVR mcu with integrated RF transmitter functionality – [Link]





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