All About Circuits

Latest Technical Articles

Categories

Convenient, Robust Data Transmission with RS-422 and RS-485

Convenient, Robust Data Transmission with RS-422 and RS-485

This article introduces the RS-422 and RS-485 interfaces and explains why you might want to use them in your designs.


Understanding Automatic Gain Control

Understanding Automatic Gain Control

How do designers cope with a system that has highly variable input amplitude yet requires fairly constant output amplitude? Let’s take a look.


The Zambroombi: Roomba’s Next Ultrasonic Competitor

The Zambroombi: Roomba’s Next Ultrasonic Competitor

The Zambroombi is the next step up from your neighbor's fancy Roomba. Set it and forget it!


Projects Nov 21, 2016 by Ryan Jones
The Importance of Complex Conjugates

The Importance of Complex Conjugates

This article provides insight into the importance of complex conjugates in electrical engineering.


The Why and How of Differential Signaling

The Why and How of Differential Signaling

Learn about the important characteristics, benefits, and applications of differential signaling, as well as the proper layout techniques for differential signals.


LED Arrays: One Resistor or Many?

LED Arrays: One Resistor or Many?

When you have multiple LEDs with a common anode or common cathode, can you use just one current-limiting resistor? Let’s take a look.


Flash Freeze Photography with an Arduino

Flash Freeze Photography with an Arduino

Freeze moments in time to easily produce extraordinary close-up pictures with your digital camera, an Arduino, and these simple circuits.


Make Your Own GPS Transmitter with the HC-12 Transceiver

Make Your Own GPS Transmitter with the HC-12 Transceiver

Create a tracking device with an HC-12 transceiver, a GPS module, an Arduino, and Google Maps.


Projects Nov 10, 2016 by Mark Hughes
Focusing on Phase: The All-Pass Filter

Focusing on Phase: The All-Pass Filter

How do you design a filter that (ideally) has the same gain for all frequencies? And, furthermore, why would you want to do this?


Raspberry Pi Object Detection Cat Toy

Raspberry Pi Object Detection Cat Toy

This object detection toy will keep your cat's head spinning for hours!


Projects Nov 07, 2016 by Ryan Jones
How to Build a Touchless MIDI Controller with Arduino

How to Build a Touchless MIDI Controller with Arduino

Learn how to build your own touchless MIDI controller using an Arduino... video and code file included.


Projects Nov 03, 2016 by Evan Kale
Understanding and Implementing the HC-12 Wireless Transceiver Module

Understanding and Implementing the HC-12 Wireless Transceiver Module

The HC-12 is a 100mW multi-channel wireless transceiver you can use in your projects to transmit and receive serial information.


Projects Nov 02, 2016 by Mark Hughes
Analyzing Circuits via Source Transformation

Analyzing Circuits via Source Transformation

This article uses examples to explain the technique of source transformation.


Introduction to Wireless Power Transfer

Introduction to Wireless Power Transfer

Wireless Power Transfer holds the promise of freeing us from the tyranny of power cords. This technology is being incorporated into all kinds of devices and systems.


Build Your Own Low-Resistance Meter

Build Your Own Low-Resistance Meter

This project will show you how to make a device that can measure resistances as low as 0.1 ohms.


Projects Oct 26, 2016 by Robin Mitchell
C-BISCUIT: Layout and Assembly for the Robot Control Board

C-BISCUIT: Layout and Assembly for the Robot Control Board

We’ll discuss some important layout and manufacturing concepts as we look at the PCB for the Robot Control Board.


Projects Oct 25, 2016 by Robert Keim
Ghostbusters Toaster—A Solenoid Lesson

Ghostbusters Toaster—A Solenoid Lesson

With the help of some solenoids, the Dancing Ghostbusters Toaster really topped off my Halloween costume this year!


Projects Oct 24, 2016 by Ryan Jones
Build Your Own LED Saber—Assembly and Hilt Construction

Build Your Own LED Saber—Assembly and Hilt Construction

In the final installment, we build our light-blade and assemble the electronics into the hilt.


Projects Oct 21, 2016 by Jeremy Lee
Build Your Own LED Saber—Firmware, Microcontroller, and Testing

Build Your Own LED Saber—Firmware, Microcontroller, and Testing

In part 3, we compile the firmware and build the controller at the heart of the Saber, then do initial testing and diagnostics.


Projects Oct 20, 2016 by Jeremy Lee
Build Your Own LED Saber—Audio and Power Systems

Build Your Own LED Saber—Audio and Power Systems

In part 2 of the LED saber project, we'll assemble the power and audio systems.


Projects Oct 19, 2016 by Jeremy Lee