GitHub - microchip-pic-avr-examples/avr128da48-tcb-frequency-dutycycle-measurement-mplab: This example demonstrates frequency and duty cycle measurement of a pulse signal using Timer/Counter type B (TCB), Event system and RTC (PIT) modules of ...
LibStock - Timer Calculator
AVR Calculator - Apps on Google Play
8051 Time delay/Timer routine calculator - Rickey's World of Microcontrollers & Microprocessors