Tracking an infrared light source is not as difficult as you might think; a 14-pin PICAXE, a stepper motor with a driver IC, three phototransistors, and a few other components will do the trick.
January 17, 2017 by Charles R. Hampton
For a local area network (LAN) to provide good coverage, improved antennas are often a better (and less expensive) option than more access points. Directional antennas are sometimes the better choice, but often omnidirectional gain antennas will work well.
December 24, 2015 by Charles R. Hampton
Programmable thermostats can save a lot of energy and money. But you don't have to buy one. You can convert an old mechanical thermostat into a programmable thermostat using an Arduino and a servo.
November 18, 2015 by Jason Poel Smith
In the last installment, we built the hardware to control an AC waveform with a TRIAC as the first step in a DIY solder reflow oven. This tutorial continues the project by showing you how to set up the low-level hardware to measure temperature, read the zero-cross detector, drive the TRIAC, and print to the serial terminal using a USART.
November 17, 2015 by Patrick Lloyd
Want to send text to an Arduino with an Android smartphone? Here's how! This article will show how an Arduino (or almost any other microcontroller) can "talk" with your smartphone, sending and receiving text in both directions.
October 16, 2015 by Hariharan Mathavan