Discussion in "8051 Discussion Forum" started by    sonali_maow    Sep 20, 2012.
Thu Sep 20 2012, 10:29 am
Hi,

How to write assembly code for electronics speedometer?plz help me
I am using 89c2051 ic and lcd. already generate rpm and count pulse using these
how to calculate speed.

Thank u.
Fri Sep 21 2012, 12:07 am
If you're calculating RPM from wheel then the RPM to Linear Velocity formula is:
v = r Ã— RPM Ã— 0.10472
Where:
v: Linear velocity, in m/s
RPM: Angular velocity, in RPM (Rounds per Minute)

If in case you're dealing with engine RPM then:

vehicle speed in miles/hour = (0.00595) * (RPM * r) / (R1 * R2)

where:
RPM = engine speed, in revolutions/minute
R1 = transmission gear ratio
R2 = rear axle ratio

ugoo5000 like this.
Tags RPM to m/sRPM to linear speedRPM to velocityangular speed to linear speed

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