4 digit auto-ranging frequency-meter.
Octavio Nogueira email (remove spam text)
>The posted circuit is incomplete, for a more sensitive frequency
>counter, it needs a pre-amplifier and convert its output to TTL level.
Does anyone have a nice and simple pre-amplifier schematic for this kind
Octavio Nogueira - mandic.com.br ICQ# 19841898 nogueira
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