Digital Speedometer using discrete components and no use of microcontrollers

I am trying to build a warning speedometer that will be capable of driving an 8 ohm speaker and the speaker will sound at 60mph and the tone increases and interrupted 10mph thereafter. It must also show a the values in 2 seven segment display. In addition I cannot used programmable chips. Can anyone please help me in my senior design project. I am struggling to build and design it. Thank you.

Can you use logic ICs?

For example the 74hcxx or CD4xxx logic family?

What is the input signal looking like, frequency, range?

You need something to produce pulses related to the speed, possibly something producing a signal once per revolution of a wheel.
Then you need an accurate timing circuit to open a gate for a predetermined period to allow the pulses to be counted within a known time period.
You can then relate pulses per period to speed in mph.
Then using binary comparators you compare the count digits with your 60/70/80 mph limits and operate your alarm as the numbers match.

It's much easier using a micro but the method of measurement is exactly the same if you do it with discrete logic devices.

An alternative but less acurate method is to use a frequency to voltage converter (maybe a charge pump circuit) to produce an analog voltage proportional to the speed then use voltage comparators to see if you have exceeded the speed thresholds.

Brian.

"Can anyone please help me in my senior design project. I am struggling to build and design it."

What happened in all the 3 years of doing the: "MASTERS OF ELECTRONICS" course?