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Teardown Tuesday: Smart Remote Control

Teardown Tuesday: Smart Remote Control

What's inside a smart universal remote control?


News May 10, 2016 by Alex Udanis
Teardown Tuesday: Budget Smartwatch

Teardown Tuesday: Budget Smartwatch

In this Teardown Tuesday, we're going to take a look at the insides of a low cost (<$30 USD) smartwatch.


News Apr 12, 2016 by Alex Udanis
Teardown Tuesday: What’s Inside a Bluetooth Speaker?

Teardown Tuesday: What’s Inside a Bluetooth Speaker?

Ever wonder what's inside a Bluetooth speaker? In this week’s Teardown Tuesday we are going to take a look at the inside of one.


News Mar 29, 2016 by Alex Udanis
All About Omnidirectional Wi-Fi Antennas

All About Omnidirectional Wi-Fi Antennas

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.


The Fundamentals of Wi-Fi Antennas

The Fundamentals of Wi-Fi Antennas

Amateur radio operators ("hams") have long said, "If you want a bigger signal, put up more metal and put it up higher." Antennas for Wi-Fi are no exception.


Introduction to the RFM69HW Transceiver

Introduction to the RFM69HW Transceiver

This handy introduction teaches you all about the RFM69HW transceiver module using two circuits running a wireless version of the "blinky" code.


Build a Laser Communication System

Build a Laser Communication System

Use a laser and a photo resistor to build a laser based point-to-point communication system. The best part? It's under $10.


Projects Oct 22, 2015 by Jacob Smith
Wireless Power for Noise-Sensitive Circuits

Wireless Power for Noise-Sensitive Circuits

Is IDT’s Tx/Rx wireless power solution suitable for applications that require high-precision analog performance?


Projects Oct 21, 2015 by Robert Keim
Hack a Mousetrap with a 433MHz RF Module

Hack a Mousetrap with a 433MHz RF Module

You can buy cheap 433MHz RF modules from Mouser and DigiKey. This article will show you how to use them with a PICAXE microcontroller to hack your own mousetraps.


EFM8 Sound Synthesizer: Playing Melodies via USB

EFM8 Sound Synthesizer: Playing Melodies via USB

Part 3 in the “How to Make an EFM8-Based Sound Synthesizer” series.


Projects Sep 17, 2015 by Robert Keim
EFM8 Sound Synthesizer: From Square Wave to Sine Wave

EFM8 Sound Synthesizer: From Square Wave to Sine Wave

Part 1 in the “How to Make an EFM8-Based Sound Synthesizer” series, which will design a sound synthesizer that can play standard musical notes. We will accomplish this using a low-cost, small-form-factor EFM8 microcontroller in conjunction with a few external components and a speaker.


Projects Sep 04, 2015 by Robert Keim
An Intro to Multiplexing: Basis of Telecommunications

An Intro to Multiplexing: Basis of Telecommunications

Multiplexing was developed in the early 1870s, but it’s become much more applicable to digital telecommunications in the late 20th century. Today, frequency division multiplexing (FDM), time division multiplexing (TDM), and wavelength division multiplexing (WDM) have become an extremely important asset to telecommunication processes and has greatly improved the way that we transmit and receive independent signals over AM and FM radio, telephone lines, and optical fibers.


Transformer Isolation

Transformer Isolation

An in-depth look at transformer isolation. Electrical isolation is necessary to protect circuits, equipment, and people from shocks and short circuits, as well as to make accurate measurements. Isolation transformers are one way to go.


Estimating Wireless Range

Estimating Wireless Range

How to estimate wireless communication range from radio parameters.