Frequency conversion?

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
Posted by TB on Sat Aug 09 2008, 05:14 PM

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Fri Jun 19 2020, 08:12 AM
anudee
sir could please send the code for I2C and wifi interfacing with 8051
scena
Thu May 28 2020, 12:14 AM
Does anyone have microcontroller programming software for STC15F104W (core 8051, 4 k, 128 byte, 6 I/O pin, UART ... DIL8), that works?
Sun May 10 2020, 09:23 PM
Tamu Gurung
Hi I am looking for a assembly language program for a digital decimal counter. Time counts max limit of 2 mins starting from 2.00 mins and ending at 0.00. time is to be displayed on 4 7-segment LED displays. Edsim51 simulator to be used. Thanks
Thu Apr 02 2020, 03:24 PM
Tajammul
Sir kindly send the code file i2c for 8051
ExperimenterUK
Sun Mar 22 2020, 12:21 AM
@ Rohitnani,ABEBE..which project ?

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