Skip navigation
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Arduino or any other controller need TTL signal levels at input to count pulses and only work with square wave. So what if we want to find out the frequency of sine ,triangular or low voltage square wave?   We can solve this problem with the help ...