ARM FFT-SA Project Gallery
ARM FFT Spectrum Analyzer
FFT (gnuarm) from avnr project by S53MV
ARM FFT-SA Sketch Diagram by S53DZ
ARM FFT-SA with DEM Display
Test: Dynamic range = 96dB and
Frequency span = 51kHz
ARM FFT-SA End results:
the two ARMs running at 72MHz
Y = 48/96dB, X Span = 102kHz
Demo Olimex ARM Board used for the first FFT (pdf)
Test FFT-SA 85kHz Input LPF (pdf)
DEM128064H to S-ARM Interconnection
FTDI used for ARM7 ISP
The final version of ARM FFT-SA is built of three units:
- FFT with
Ursus(LPC2148),
- display with
S-ARM(LPC2138/01)
and
- graphic LCD
DEM128064H
At the ARM A/D FFT input there is a DC bias circuit, a voltage limiter and a LPF filter.
A good
105kHz LP filter
is needed to minimize the aliasing effect.
