Pocket Spectrum Analyzer This is alternative firmware for the Girl Tech IM-Me (http://www.girltech.com/electronics-imMe.aspx) that implements a basic spectrum analyzer. WARNING! You could destroy your device if you try to use this software. You certainly would have a hard time getting your device to work as originally intended ever again. There is no known way to recover the original firmware. installation: For more complete instructions, see: http://travisgoodspeed.blogspot.com/2010/03/im-me-goodfet-wiring-tutorial.html Abbreviated instructions follow: 1. Acquire or build a GoodFET (http://goodfet.sourceforge.net/). There are other ways to program the IM-Me, but you're on your own. 2. Wire your IM-Me to the GoodFET according to http://www.flickr.com/photos/travisgoodspeed/4322361457/ 3. goodfet.cc flash specan.hex Alternatively you may compile from source with sdcc and install with "make install". usage: The LCD shows the relative power levels received across a range of frequencies indicated in MHz along the bottom. bandwidth settings: There are three bandwidth modes: wide (default), narrow, and ultrawide. Wide mode displays 26.4 MHz of bandwidth in 200 kHz increments. Narrow mode displays 6.6 MHz of bandwidth in 50 kHz increments. Ultrawide mode displays 88 MHz of bandwidth in 667 kHz increments. You can cycle through the modes with the "Menu" button or select a mode with the "W", "N", or "U" buttons. frequency selection: Set the frequency by scrolling with the left or right arrow buttons. The supported ranges are 281 - 361, 378 - 481, and 749 - 962 MHz. power level resolution: There are two power level resolution modes: short (default) and tall. Short mode displays six bits of power level information. Tall mode displays eight bits of power level information. You can toggle between the two modes with the "Bye!" button or select a mode with the "S" or "T" buttons. power level scrolling: Scroll up and down with the smile wheel or the "Q" and "A" buttons. Scrolling is often necessary when using tall mode. Tip: You can scroll faster in short mode and then switch back to tall mode. max hold: Press the "M" button to active or deactivate max hold. The maximum power level received during the current activation of max hold is displayed as a dot above the normal bar graph display. Max hold is automatically deactivated whenever the frequency or bandwidth settings change. thanks: Thanks to Dave for an incredible job of reverse engineering the IM-Me and sharing his code: http://daveshacks.blogspot.com/ Thanks to Travis Goodspeed for developing the GoodFET, introducing me to the IM-Me, and sharing his code: http://travisgoodspeed.blogspot.com/ home: You can find the most recent version of this software at: http://www.ossmann.com/sa/ author: Michael Ossmann <mike@ossmann.com>