The sine wave is a naturally occurring signal shape in communications and other electronic applications. Many electronic products use signals of the sine wave form. Audio, radio, and power equipment usually generates or processes sine waves. As it turns out, there are literally dozens of ways to generate a sine wave. Here are some popular methods you should be familiar with.
Driving LEDs using the lowest possible pin-count is a common challenge for folks creating projects with microcontrollers. Complementary LED drive, also known as “Charlieplexing”, allows a large number of LEDs to be controlled with a relatively small number of I/O pins. This fun digital LED clock project is a hands-on example of how Charlieplexing can be used to stretch your “pin budget”!
There are lots of circuits for generating high voltages out there, but what about the “gotchas?” Learn how to be safe and smart when working with these potentially dangerous types of projects.
Debugging microcontroller designs can be difficult due to resource limitations that block or curtail access to real time information internally and externally. In this article, I’ll demonstrate both a multiplexed bus protocol analyzer and the 1-Wire Manchester decoder. Combining these logic analyzer decoders with an embedded software Manchester encoder forms a great tool to enhance your debugging and diagnostic skills.
To master the art of electronics, it's important for you to learn the basics. I'm talking Ohms Law, serial and parallel discrete components, and simple signal sources. This might seem self-evident, but since the introduction of the increasingly popular microcontrollers and standard sensors and effectors, it's possible to create electronic devices without ever touching a capacitor or resistor.
As the Jedi Padawans demonstrate in Star Wars, acquiring the first 80% of knowledge and skills may take a few weeks or months, but getting a handle on the remaining 20% usually takes years of study and practice under the leadership of a master.
This fourth installment will examine the more complex circuits from the book, “555 Timer IC Circuits” by Forrest Mims. Some will use the PIC replacement from Part 1, while others will develop specific programs using a PIC to emulate a particular implementation of a 555.
For audiophiles, musicians, and ham radio operators, the soft glow of the vacuum tube filament is not only an indication of function, but a nostalgic trigger for memories of simpler times. Though they may have been outpaced by tiny transistors and integrated circuits, these workhorses still may have something to offer in many modern devices.
The “magic” of Proportional Integral Derivative (PID) process control can be mystifying. In this article, we’ll step you through using an Arduino in a hands-on exercise using a solid-state relay to control a 1,500 watt hotplate in a real world solution to a tricky problem: automating a vegetable canning process.
Here’s a quick beginner-friendly tutorial that shows you how to interface and read data with the popular serial protocol, I2C. In particular, we’ll be reading data from the NXP MPL3115A2 altimeter/barometer/temperature sensor. The principles found here can also be applied generically, even to your ambifacient lunar wane shaft positioning sensor of your turboencabulator.