Everything for Electronics
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Implementing Circuits on Protoboards

You have found or designed a circuit, and it’s time to build a permanent version of it. You could design and order (or make) a printed circuit board, but that will cost money and/or time. It also makes changes and corrections difficult. The obvious alternative: Implement the circuit on one or several prototyping boards. So, how do you go about building on a protoboard? I’ll describe a sequence of steps here.

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For IoT Projects, Call JSON

Internet-of-Things (IoT) projects that use sensors, actuators, displays, or controllers can easily communicate through an MQTT (Message Queuing Telemetry Transport) server, or broker. The MQTT standard lets devices publish and subscribe to specific topics. When they use the JavaScript Object Notation (JSON) format to exchange information, software can easily interpret or parse it. In this tutorial, I'll explain how to create and parse JSON messages.

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Parallel Processing with the Propeller FLiP

The Parallax Propeller chip is an impressive multi-core microcontroller ... and the Propeller FLiP board makes it even more powerful! See how to integrate these together in your projects.

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Libraries and Headers in C: A Tutorial

If you’ve written a program for a microcontroller board such as the Arduino, Raspberry Pi, or Propeller QuickStart, you have relied on software libraries that provide constants and functions.  Often, we use software libraries without thinking much about them.

When you start to write libraries, it takes time to read documents, follow directions, and experiment with simple functions. Fortunately, after you understand how to create libraries and header files for the software tools you use, you'll have a useful skill that can simplify programming tasks.

Even if you never create a library, you probably want to know how they work and what they contain. This tutorial provides information that gives you a good start.

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CNC Routers: Backlash

Backlash can have a detrimental effect on tool life and on your CNC router’s ability to maintain accurate positioning of the X, Y, and Z axes. In this article, we’ll look at the problem of backlash in CNC routers. Once you understand what role it plays, you’ll want to diminish its impact on your machine. Whether you own or intend to build/buy a CNC router, make it a habit to routinely check for backlash. It could save you some money and/or aggravation.

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More Tricks with Old-School Digital Clocks

Here are a few of the many possible variations on the general theme of discrete-logic digital clocks. If you have a few LED displays, counters, drivers, and simple logic, you can probably build a clock. Consult the datasheets of the ICs you choose to use, breadboard everything first, and have fun.

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How Phased Array Antennas Work

Phased arrays have been used for years in military radars for long range detection of missiles. They’re also widely used in military and commercial aircraft radars and some satellites. These phased arrays are expensive, but today thanks to new technology and higher frequencies, phased arrays are smaller and more affordable making them practical for new wireless devices. This article is an introductory tutorial on this special antenna type you need to know about.

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