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Build a 2-Digit Up/Down Counter with a PICAXE 20M2

Build a 2-Digit Up/Down Counter with a PICAXE 20M2

Counters using 7-segment LEDs are fun and useful projects for scoreboards and other numerical displays; here's one you can build.


Make a GPS Navigation System for a Boat with a Raspberry Pi

Make a GPS Navigation System for a Boat with a Raspberry Pi

If you are a boat owner, I'll guess you've seen some of the prices on the chart plotters and navigation tools. Some of them are pretty expensive. In this article I'll show you how I deal with that.


NES Controller Interface with an Arduino UNO

NES Controller Interface with an Arduino UNO

Learn about the NES Controller's data protocol, then use this knowledge to easily integrate into an Arduino Uno.


Projects Apr 29, 2016 by Joseph Corleto
C-BISCUIT: The Brains of the Operation

C-BISCUIT: The Brains of the Operation

In this article, we teach C-BISCUIT how to do important life things, such as booting into our OS of choice, and connecting to the Wi-Fi it'll come to know as the gateway to knowledge.


Projects Apr 26, 2016 by Trevor Gamblin
Servo Control via USB with the SAM4S Xplained Pro

Servo Control via USB with the SAM4S Xplained Pro

Part One in this two-article series focuses on the hardware setup and on using a pulse-width-modulated signal to control a servo.


Projects Apr 22, 2016 by Robert Keim
Use a DC Motor to Power LED Headlights on a Longboard

Use a DC Motor to Power LED Headlights on a Longboard

Build a generator-powered LED headlight for a longboard for very cheap.


Projects Apr 20, 2016 by Jacob Smith
Build an Automatic Computer Display Rotator With an Arduino

Build an Automatic Computer Display Rotator With an Arduino

Learn how to build a device which senses when your computer monitor is physically rotated, and automatically tells your computer to rotate the display accordingly.


Projects Apr 12, 2016 by Matthew Davis
How to Create a Gaming System with the Atmel SAM4S Xplained Pro

How to Create a Gaming System with the Atmel SAM4S Xplained Pro

This article provides additional details related to code development, hardware configuration, and the OLED interface.


Projects Apr 01, 2016 by Robert Keim
Intro to Project Development with the Atmel SAM4S Xplained Pro

Intro to Project Development with the Atmel SAM4S Xplained Pro

Learn about basic procedures and techniques for creating your own projects with Atmel’s SAM4S Xplained Pro development platform.


Projects Mar 28, 2016 by Robert Keim
How to Buffer an Op-Amp Output for Higher Current, Part 2

How to Buffer an Op-Amp Output for Higher Current, Part 2

In this article, we will look at two variations on the basic BJT current-buffering circuit.


Thermal Design with Linear Voltage Regulators

Thermal Design with Linear Voltage Regulators

Will your linear regulator function properly under all possible operating conditions? To find out, you need to understand power dissipation and thermal resistance.


C-BISCUIT Power: Crowbar Protection Circuit for 5V Regulator

C-BISCUIT Power: Crowbar Protection Circuit for 5V Regulator

Over-voltage and over-current protection circuit for use with the C-BISCUIT platform's main computer, the Wandboard.


Projects Mar 09, 2016 by Patrick Lloyd
Embedded PID Temperature Control, Part 6: Ziegler–Nichols Tuning

Embedded PID Temperature Control, Part 6: Ziegler–Nichols Tuning

In this article, we will use a simple, proven tuning procedure to find effective values for proportional, integral, and derivative gain.


Projects Mar 07, 2016 by Robert Keim
Building Raspberry Pi Controllers Part 6: Displaying Messages on a LCD with a RPi

Building Raspberry Pi Controllers Part 6: Displaying Messages on a LCD with a RPi

Readers will learn how to wire a standard 16x2 LCD (liquid crystal display) to a Raspberry Pi to display messages.


Projects Mar 04, 2016 by Don Wilcher
Program a PIC Microcontroller as an I2C Slave Device for Custom Sensor and I/O Interfacing

Program a PIC Microcontroller as an I2C Slave Device for Custom Sensor and I/O Interfacing

No I2C interface with that sensor? No problem. Program a PIC chip as an I2C slave device for custom sensor and I/O interfacing. Here, we use three DHT22 sensors on a single I2C interface.


Embedded PID Temperature Control, Part 5: Adjusting Gains

Embedded PID Temperature Control, Part 5: Adjusting Gains

We will explore how P, I, and D gain influences system performance, and in the process we will find a gain configuration that works well for our temperature controller.


Projects Feb 29, 2016 by Robert Keim
C-BISCUIT Power: 5V 3A Buck Regulator for Wandboard

C-BISCUIT Power: 5V 3A Buck Regulator for Wandboard

Design and theory behind the 5V-3A buck regulator based on the LM25575 to be used in the C-BISCUIT robot project.


Projects Feb 26, 2016 by Patrick Lloyd
Embedded PID Temperature Control, Part 4: The Scilab GUI

Embedded PID Temperature Control, Part 4: The Scilab GUI

With USB communications and a Scilab graphical user interface, we can really see what the PID controller is doing.


Projects Feb 19, 2016 by Robert Keim
Embedded PID Temperature Control, Part 3: Implementation and Visualization

Embedded PID Temperature Control, Part 3: Implementation and Visualization

We will implement a basic PID (proportional–integral–derivative) controller in firmware and observe the results using an oscope and LEDs.


Projects Feb 15, 2016 by Robert Keim
C-BISCUIT: Design Choices and Justification

C-BISCUIT: Design Choices and Justification

While the C-BISCUIT project is far from complete, it's already come a long way, seeing numerous ideas and design goals in the process. This article will discuss some of these.


Projects Feb 10, 2016 by Trevor Gamblin