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Topic: [Solved] EMF detector using LM339 (Read 2039 times) previous topic - next topic

allanhurst

Feed the AD8314 output to an arduino analog input, and you'll get a pretty good idea of signal strength. 

Add a tunable filter at the input ( or a superhet with a vco, mixer  and lowpass filter) and you've got the crude basics of a spectrum analyser...

Allan

megavoid

#16
May 10, 2017, 11:56 pm Last Edit: May 11, 2017, 12:03 am by megavoid
I prefer to do FFT or FHT in software using big brother to get the wideband spectrum analyser data when needed :) But it is still very interesting to calculate and build own tx/rx circuits in hardware.

Grumpy_Mike

@ megavoid What has that to do with the question?

allanhurst

FFT's with a 400MHz signal takes a pretty hairy a/d and processor...

Allan

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