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A Homebrew Versatile X10 Signal Analyzer (Data Logger) using a Lego RCX

A Homebrew Versatile X10 Signal Analyzer (Data Logger) using a Lego RCX

While investigating ways to improve X10 reliability (eventually hitting upon the X10RfConfiguration), I considered different approaches to see if any of the (often time-consuming and expensive) changes I was making in my X10 configuration were helping at all.

http://hawiki.pbwiki.com/X10RcxSignalAnalyzer

Distortion Analyser

Distortion Analyser

Total harmonic distortion (THD) measurements are one of the most commonly quoted in audio. Contrary to belief in some circles, these can be very useful if performed properly, and reveal much about the overall performance of an amplifier.

http://sound.westhost.com/project52.htm

3 Channel Spectrum Analyzer

3 Channel Spectrum Analyzer

This 3 channel 15 LED spectrum analyzer is the perfect addition to any audio amp project. It produces fantastic displays on three LED bars that can be individually adjusted for any particular frequency range. The circuit will take line level output from most any audio source, and operates on 12V DC. This means that it can even be run in a car.

http://www.aaroncake.net/circuits/3chspec.asp

Spectrum Analyzer and Equalizer Designs

Spectrum Analyzer and Equalizer Designs

A spectrum analyzer can be a powerful tool for keeping your studio well tuned. Besides its obvious uses - for adjusting octave or one-third octave room equalizers - a spectrum analyzer can also be used to check the response of a tape recorder, or even help identify the rumble frequencies in an air conditioner.

http://www.ethanwiner.com/spectrum.html

Homebrew spectrum analyzer

Homebrew spectrum analyzer

This DC to 50 MHz spectrum analyzer uses a standard oscilloscope for display. Dynamic range is better than 70dB using the received signal strength indicator (RSSI) of an FM demodulator IC.

http://www.holmea.demon.co.uk/SpecAnHtml/SpecAn.htm

FM Radio Spectrum Analyzer

FM Radio Spectrum Analyzer

a device which will display the strength of all FM Radio stations simultaneously.

http://www.ee.washington.edu/circuit_archive/circuits/ee498/final/index.htm

Homebrew Spectrum Analyzer Project

Homebrew Spectrum Analyzer Project

using CATV tuners

http://www.nitehawk.com/rasmit/sa50.html

Leonardo Spectrum

Leonardo Spectrum

A synthesys tool, which will optimize your ASIC/FPGA/CPLD design. Evaluation license is available.

http://www.mentor.com/products/fpga_pld/synthesis/

Poor Mans Spectrum Analyzer

Poor Mans Spectrum Analyzer

http://www.science-workshop.com/

RF Spectrum Analyzer

RF Spectrum Analyzer

http://www.web-ee.com/Schematics/RF_Spectrum_Analyzer/RFSpecAna.htm


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