#### If you know any 3 values (Pulley sizes or **RPM**) and need to **calculate** the 4th, enter the 3 known values and hit **Calculate** to find the missing value. Decimal Fraction. For example, if Pulley 1 is 6" diameter, and spins at 1000 **RPM**, and you need to find Pulley 2 size to spin it at 500 **RPM**, enter Pulley 1 = 6, Pulley 1 **RPM** = 1000, Pulley 2 **RPM** .... Now that you know the time between **pulse** edges, you can determine **how** many clock cycles occur between the **pulse** edges. Since the MAX6615/MAX6616 use a 1.95kHz clock for the tachometer counter, you can determine the value of the tachometer register by multiplying the time between **pulses** by the clock-counter frequency of 1.95kHz. 1) PWM width in %. 2) Applied voltage to motor . 3) Motor speed in **RPM** . It uses arduino UNO board to generate PWM and measure/**calculate** above 3 parameters. These parameters are displayed on 16x4 LCD. You know **how to calculate** the number of **pulses** per revolution for a DC motor with a built-in encoder. You Will Need.

**pulse**) signal. the counter max value will give you (according to the sampling rate) the period, so you can easily convert that to frequency or

**RPM**.. most aftermarket tach's are designed to be connected to the ignition coil.so if your tach is configured for a 4 cylinder engine, it would be expecting two

**pulses**for every revolution, since you are taking a signal from the crank sensor, you only get one

**pulse**per revolution (hence the %50

**rpm**readings).either configure the tach for 2 cylinders or. Apr 07, 2021 · Now, follow the following steps in the image below. When you open the Serial Monitor, the

**pulse**count should be 0. Using your hand, rotate the motor a complete 360-degree turn. Here is the output. We can see that there were 620 pulses generated. Thus, this motor generates 620 pulses per revolution. That’s it..