is it possible to build a frequency to voltage converting that runs off of 2 AA batteries.
frequency to voltage converter
Sep 26, 2006
9 Replies
Sure.
John
fully charged, or flat?
martin
ok. could u please post a chip part number. thanks
What frequency range and output voltage range?
1400 - 3500 Hz and max output of 3 v
2003
What current? I am sure you can find chips to do it. The cheapest way I can think of is to use a $2 micro to switch/pump/charge a large capacitor, based on the input (frequency) and output (voltage). You can think of the micro as a feedback controller.
Or fire a one-shot, HC123 maybe, and lowpass filter its output.
John
Actually, the batteries should be charged while measuring. :-)
Rene
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