The project is a 4-digit LED voltmeter and frequency counter that was previously based on PIC16C71 but was replaced by 28-pin device PIC16F876. The PIC16F876 is capable of driving 4-digit LED in ...

An accurate way to calibrate a frequency source is to use a high-resolution counter/timer to measure the beat frequency, or phase difference, between the source to be calibrated and a reference such ...

Do you need a multifunction frequency meter for making time-related measurements? Take a look at this user-friendly design from 2004. It’s a creative solution that offers a wide range of measurement ...

Let’s say you want to build a Nixie clock. You could go out and find some tubes, source a good power supply design, start whipping up a PCB, and working on a custom enclosure. Or, you could skip all ...

Abstract: The main aim of this paper is to design the digital frequency meter with frequency analyzing module. As a measuring frequency's instrument, the cymometer often refer to as electronic counter ...

[Scott] built this frequency counter using less than $10 in parts. It’s set up to meter frequencies in megahertz which is fitting since he’s planning to use it with his radio hardware experimentation.

This project implements a frequency counter using an AVR microcontroller, a 16-bit timer, and external interrupts. It allows measuring the frequency of an input square wave signal accurately. Connect ...

The code offers a Mute facility for switching the frequency source on/off. It will set the given GPIO high/low for if your hardware can switch the frequency source on/off. It will only turn on and ...

The author is a broadcast contract engineer who has a unique way of measuring the carrier frequency of the AM stations in his care. Making off-air frequency measurements of AM broadcast stations can ...