The Fourier Analysis –The Fast Fourier Transform (FFT) Method
https://www.electronics-lab.com/article/the-fourier-analysis-the-fast-fourier-transform-fft-method/
Introduction The Fourier Transform is a mathematical technique that transforms a time-domain signal into its frequency-domain representation. In other words, it decomposes a signal into its frequency components. The result is called the spectrum of the signal. Historically, the Fourier analysis concept developed slowly, from the Fourier series method 200 years ago up to the Discrete Fourier Transform (DFT) computing method today. Essentially, the Fourier decomposition was […]
100MHz Frequency Meter using ATtiny414
https://www.electronics-lab.com/100mhz-frequency-meter-using-attiny414/
David Johnson-Davies published a new project on his blog. This project is a simple frequency meter capable of measuring frequencies up to 100MHz with an accuracy of 0.002%. Based on an ATtiny414, it demonstrates the use of Timer/Counter TCD0 and the Event System: I recently wanted to design a frequency meter that would measure up […]
AC Waveform and AC Circuit Theory
https://www.electronics-lab.com/article/ac-waveform-and-ac-circuit-theory/
Introduction When talking about current or voltage, these signals can be fitted into two main categories : DC and AC. DC states for “Direct Current“, this definition regroup the signals that are constant in time : their amplitude and sign (+ or -) remain unchanged. AC states for “Alternating Current“, these signals are alternating between […]
How the Switching Frequency Affects the Performance of a Buck Converter
https://www.electronics-lab.com/switching-frequency-affects-performance-buck-converter/
The buck converter uses an inherent switching action to regulate voltage. This switching frequency can affect the performance of a buck converter,and is thus very important. This application report analyzes the influence of switching frequency on buck converter performance in terms of efficiency, thermals, ripple, and transient response. It also shows bench test results at […]
Build Your Own Cheap Antenna Analyser
https://www.electronics-lab.com/build-cheap-antenna-analyser/
Ham radio is the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, etc. Developing a ham radio project may requires using an antenna analyser, a device that is used for measuring input frequency and impedance. There are many types of antenna analysers such as Anritsu VNA Master, RigExpert, […]
Rubidium Disciplined Atomic Clock
https://www.electronics-lab.com/rubidium-disciplined-atomic-clock/
Cameron Meredith build a real-time-clock module controlled by a rubidium frequency standard, and since it also includes a GPS clock he can track local time dilation effects by comparing the two. An I2C multiplexer board allows for more than one RTC module (Since these have a hard coded I2C address you can normally only use […]
ICS501 simple frequency multiplier
https://www.electronics-lab.com/ics501-simple-frequency-multiplier/
Scott from SWHarden has published a new build: Today I made a high frequency multiplier using a single component: the ICS501 PLL clock multiplier IC. This chip provides 2x, 5x, 8x (and more) clock multiplication using an internal phased-lock loop (PLL). At less than a dollar on eBay, $1.55 on mouser, and $0.67 on Digikey, […]
VXO – based PLL frequency synthesizer for 7 MHz
https://www.electronics-lab.com/vxo-based-pll-frequency-synthesizer-7-mhz/
Vasily Ivanenko made a VXO-based synthesizer: To make a VXO to mix with a ~7 MHz VCO, you’ll need a crystal that is higher in frequency than the highest frequency you want to synthesize. Some rummaging revealed a bag of 21.4773 MHz crystals that I could divide by 3 to garner 7.159 MHz. To afford a […]
Designing a mains frequency monitor
https://www.electronics-lab.com/designing-mains-frequency-monitor/
Dan Watson writes: This is the second in a series of posts about designing a mains frequency monitor using the Microchip PIC 16F1619 microcontroller. In this post we will take a look at the first revision of the board that I designed for the project and some of the features that it adds. Be sure […]
Electricity Frequency Meter
https://www.electronics-lab.com/electricity-frequency-meter/
This project is about an accurate mains frequency meter that has a bar-graph displaying the relative deviation from nominal frequency. It can work with 50Hz and 60Hz systems. An article by Dieter Laues in the February 2012 issue of Elektor inspired me to get my soldering iron out. The article described how by measuring the […]