This frequency meter project squeezes a lot of performance out of the ATtiny2313 microcontroller. That chip does all of the work, measuring the frequency on the input pin as well as multiplexing the ...

The circuit was designed to create a low cost frequency meter that will cover the range of 1 Hz to 1 MHz with a digital indication using three 7-segment displays. 7805 – a 3-terminal 1A positive ...

This frequency meter is suitable for sinusoidal wave and square wave input signals. Minimum input potential must be 25mV(rms). Measurement range can be determined from 10 Hz to 100 kHz by using the S1 ...