Building the digital tachometer came out successfully as we saw in the data & observations section. The video showed the circuit with a computer fan interrupting the emitter/detector circuit which sent rising edge signals of +5v to the microcontroller. The LCD output the proper value from the rpm counter corresponding to the fan's current speed and it was accurate! One additional thing I did do to verify, was capture the pulse frequency on an oscilloscope and make sure it matched up with the LCD's RPM data which it did.
Posts: 6,843
Threads: 4
Joined: Mar 2015
advantages and disadvantages of digital tachometer pdf
Tachometer (Revolution counter, tachometer, tachometer, the RPM gauge) is an instrument for measuring the rotational speed of the disk or, as in the machine.The engine or other device usually displays the number of revolutions per minute (RPM) on the calibrated analog dial, but digital displays are becoming more common. The word comes from the Greek ταχος (Tachos "speed") and Metron ( "measure"). In fact the word tachometer and speedometer are of equal importance: a device that measures the speed. It is an arbitrary convention that one is used for the engine in the automotive world, and the other to the vehicle speed. In formal terms of engineering, more precise terms are used to distinguish between the two.
