An interesting aspect of time-varying waveforms is that by using a trick called a Fourier Transform (FT), they can be represented as the sum of their underlying frequencies. This mathematical insight is extremely helpful when processing signals digitally, and allows a simpler way to implement frequency-dependent filtration in a digital system. [klafyvel] needed this capability […]
THE FASTEST FOURIER TRANSFORM IN THE WEST Continue Reading
OMRON Corporation of Kyoto, western Japan globally released its new MOS FET (*1) relay module “G3VM-21MT” on December 2, 2019. The product is the first electronic component in the world (2) to adopt a “T-type circuit structure” (3). With a T-type circuit structure consisting of compact-size and longer-lifecycle solid-state relays that output signals using no physical contact, the relay
To extract information from QR codes and use a Barcode & QR Code HAT and a Raspberry Pi Pico. Description To extract information from QR codes and (even create your own barcode & QR Code using Python), use a Barcode & QR Code HAT and a Raspberry Pi Pico. What Are QR Codes and How Do They Work?
Scan QR Codes with Raspberry Pi Pico Continue Reading
Nexperia announced the market’s fastest common mode filter (choke)/ ESD protection combination. The new PCMFxUSB3BA/C features the industry’s widest differential passband of up to 10 GHz 3 dB frequency and very high surge robustness of up to 7.5 A 8/ 20 µs. It is designed to suppress common mode and single-ended noise while minimizing the
A traditional early project for someone discovering a love for electronics has been for many years a metal detector. This would mean a few transistors back in the day, but today it’s more likely to involve a microcontroller. [Mircemk] has an example that bends both worlds, with a single transistor oscillator and an Arduino. This type
A NO-CALIBRATION METAL DETECTOR Continue Reading
These days, streaming services are a great way to listen to music or podcasts on your computer or on the go. However, they lack one feature of the MP3 players and streamers of old: visualizations! [mircemk] is a fan of those, and has built a hardware spectrum analyzer that pumps with the music. The build relies
CHARACTER VFD BECOMES SPECTRUM ANALYZER Continue Reading
Introduction Modern phased array transducers for industrial NDT are usually made from piezocomposites, which in turn consist of many small thin segments of piezoelectric ceramic embedded in a polymer matrix. Phased Array Transducer comes in a wide variety of shapes, sizes, frequency ranges, and a number of elements. This technology is most often used to
4 Methods to Choose Your Right Phased Array Transducer Continue Reading
If you haven’t seen [Ken Shirriff]’s teardowns and reverse engineering expeditions, then you’re in for a treat. His explanation and demonstration of the Apollo digital ranging system is a fascinating read, even if vintage computing and engineering aren’t part of your normal fare. The average Hackaday reader should be familiar with the concept of determining the distance
THE APOLLO DIGITAL RANGING SYSTEM: MORE THAN MEETS THE EYE Continue Reading
This sketch is used by Exercise: Event-Loop Programming. Full Source Code The full code is all in one file EventLoopDemo.ino. // EventLoopDemo.ino : demonstrate generation of two simultaneous square waves at different rates // The example program generates audio-frequency square waves at different // pitches on pins 4 and 5 to demonstrate a simple event-loop control structure
Arduino Sketch Event Loop Demo Continue Reading
Making a microcontroller perform as a frequency counter is a relatively straightforward task involving the measurement of the time period during which a number of pulses are counted. The maximum frequency is however limited to a fraction of the microcontroller’s clock speed and the accuracy of the resulting instrument depends on that of the clock
NTP, RUST, AND ARDUINO MAKE A PHENOMENAL FREQUENCY COUNTER Continue Reading
