variable frequency - Rickey's World of Microcontrollers & Microprocessors

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I'm using a DS89C450

I need to monitor a +7V input with variable frequency - is it possible to sample the frequency on a 8051 without additional hardware?

I need this to log revolutions of an engine. Output is as said +7V, when the engine is idling output is 26Hz (approx. 750rpm). So basically I need to translate the frequency of the input to a given value. Is it possible?

EDIT: Can I use the externa... Read Compelte post

Other Tags: frequency conversion variable frequency revolutions timer

Posted by TB on Sat Aug 09 2008, 10:44 pm

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