Intel 8051 is used as the main microcontroller unit and the system has been fabricated to count the total number of pulse in a minute.

“8051” is simply the generic name given to the entire series because it was the first single chip microcontroller solution of the series. Following are six basic intel versions with which the reader ...

Also, many eight-pin microcontrollers have a built-in analog-to-digital converter channel that can be used together with a 2-1/2-digit display to build a voltmeter.

The ultralow-cost, two-digit- counter circuit in Figure 1 represents an attempt to reduce the number of components using a mostly software approach and a low-cost microcontroller, the PIC16F84A.