A Reasonable Facsimile??

[Randy Gross]

Greetings,

The LM331 chip is/was used in a V to F circuit I found but, as I understand
it, the chip was discontinued in 1995. Is there a sub that can be used?

The circuit can be viewed at:

http://members.shaw.ca/roma/thirteen.html

It is the frequency to voltage circuit that allows the frequency to be read
as voltage with a DVM.

Thanks,
Randy

 

[Robert Monsen]

http://www.national.com/pf/LM/LM331.html

looks to still be in production...