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26 Mar 2015

IMG_20150326_09360122-600x450

Martin writes:

The rumors for RFM12B’s end-of-life two years ago seem to have been highly exaggerated now and the popular RF module is still available in abundance. HopeRF has introduced a pin-compatible upgrade, the RFM69CW. The module itself offers improved sensitivity and range compared to the RFM12B (+30%) at the cost of increased power consumption, making it probably a good choice for the receiving end (RFM2Pi), and probably less suited for low power battery operated nodes. The new module supports RSSI for those interested in measuring it.

The new module is more power hungry, and simply replacing a RFM12B on the RFM2Pi v2 or a Funky v3 with it didn’t work; The boards browned out so I had to swap C4 and C7 on the RFM2Pi with 10uF caps and populate the 0805 10uF on Funky v3’s boost regulator circuitry to get it to work. I’ll ship the boards with these refinements from now on so that they are compatible with both the RFM12B and RFM69CW.

[via]

Using RFM69CW instead of RFM12B - [Link]

3 Sep 2014

tiny-ATtiny-Node

Tiny ATtiny Node with temperature sensor project at Arduino Praxis:

Tiny sensor board with ATtiny84 and RFM12B Transceiver. The size of the PCB is 25 x 30mm, sightly larger than a canadian quarter coin.

[via]

Tiny ATtiny Node - [Link]

7 Feb 2012

www.simpleavr.com writes:

This is a simple rf spectrum analyzer project based on TI Launchpad. i have been working on other rf transceiver projects and in need of a simple rf spectrum analyzer to help me visualize what’s happening.

This is a linux project, i had given attention with my best knowledge to make provisions so that it can be built under windows. however i do not have the time and resources to try out everything under windows.

I did successfully built and run the project under windows 7 w/ TI CCS IDE, for host visualization script, it also works under windows but required you to install some unixish packages (cygwin and more)

I need something simple to show the pattern of frequency hopping. i do not need very accurate display of rf power. the Launchpad came in handy as it is inexpensive and contains fast ADC functions. the included usb to uart is a plus as i can communicate data between the MCU application w/ a PC side application for visualization. there are around a dozen or so commands that you can issue via SPI to control the RFM12B, as well as sending and receiving data.

RFM12B Spectrum Analyzer - [Link]

12 Apr 2011

dangerousprototypes.com writes:

JeeLabs has a product known as the JeeNode v5, which is essentially a miniature Arduino (Atmega328p) board with an onboard RFM12B wireless module. Boards are available with the serial interface (shown above) as well as USB.

You can buy the kit directly from JeeLabs, or build your own using the schematic and documentation provided.

While it’s not an Xbee compatible RF unit, the RFM12B has its own RF12 library of functions which should help you accomplish many control and data transfer tasks.

JeeLabs JeeNode combines Arduino, RF – [Link]


30 Nov 2010

This project is a well documented RF spectrum analyzer based on MSP430 TI Launchpad. It uses a RFM12B module to analyze signals in the 915 MHz band. The measurements are visualized on an attached Linux PC running a Perl script. [via]

MSP430 based RF spectrum analyzer – [Link]



 
 
 

 

 

 

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