Latest Wireless/RF Technical Articles

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

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

MQ Telemetry Transport (MQTT) is a popular low-overhead messaging protocol used by many IoT devices to communicate. This…

MQ Telemetry Transport (MQTT) is a popular low-overhead messaging protocol used by many IoT devices to communicate. This tutorial will show the user how to to set up a basic MQTT network using Python on his or her computer and an ESP8266 running the NodeMCU firmware.

How to set up the build environment for the nRF51 system-on-chip using makefiles and ARM-GCC.

How to set up the build environment for the nRF51 system-on-chip using makefiles and ARM-GCC.

Part 2 in the “How to Make an EFM8-Based Sound Synthesizer” series.

Part 2 in the “How to Make an EFM8-Based Sound Synthesizer” series.

ZigBee, Bluetooth and the newer Bluetooth Low Energy (BLE/Smart) are all communication protocols for Wireless Personal…

ZigBee, Bluetooth and the newer Bluetooth Low Energy (BLE/Smart) are all communication protocols for Wireless Personal Area Networks (WPANs), but they are optimized for different applications.

Part 1 in the “How to Make an EFM8-Based Sound Synthesizer” series, which will design a sound synthesizer that can…

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.

Learn how to set up the Wunderbar platform to begin building your own IoT apps. This will demonstrate the "Can't Touch…

Learn how to set up the Wunderbar platform to begin building your own IoT apps. This will demonstrate the "Can't Touch This" and "Tell Me When" demo applications to measure WunderBar sensors and perform actions based on them. Some of the major bugs are discussed.

This article will go into a bit of the background of FSK and demonstrate writing a simulator in Python.

This article will go into a bit of the background of FSK and demonstrate writing a simulator in Python.

Create a smart home by displaying the current salt level of your water softener with the CC3200 and a proximity sensor.

Create a smart home by displaying the current salt level of your water softener with the CC3200 and a proximity sensor.

This is one simple way to control a LED, fan, relay or solenoid with a computer and a PIC.

This is one simple way to control a LED, fan, relay or solenoid with a computer and a PIC.

Detect audio with an electret microphone and a TI CC3200 Wifi microcontroller. This handy project will allow you to set…

Detect audio with an electret microphone and a TI CC3200 Wifi microcontroller. This handy project will allow you to set up an audio detection device that can be used to catch your roommate stealing things from the fridge or send you an alert if the noise in your room goes above a certain threshold.

Multiplexing was developed in the early 1870s, but it’s become much more applicable to digital telecommunications in…

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.

An in-depth look at transformer isolation. Electrical isolation is necessary to protect circuits, equipment, and people…

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.

Smith Charts are an extremely useful tool for engineers and designers concerned with RF circuits. This article covers the…

Smith Charts are an extremely useful tool for engineers and designers concerned with RF circuits. This article covers the mathematics behind creating the chart and its physical interpretation.

Learn how to connect your device with Linux Screen using the built-in Lua interpreter to set up the file system and…

Learn how to connect your device with Linux Screen using the built-in Lua interpreter to set up the file system and connect to the network. Then, learn how to automate the scripting process with Luatool and put it all together with a basic TCP server that can interact with a pulse-width modulated LED, a potentiometer, and a switch.

How to estimate wireless communication range from radio parameters.

How to estimate wireless communication range from radio parameters.

Compile and install NodeMCU on the ESP8266 IoT chip using Linux tools and the ESP Open Source SDK

Compile and install NodeMCU on the ESP8266 IoT chip using Linux tools and the ESP Open Source SDK

Qi (pronounced as "chee") charging is an optimized inductive charging concept also known as “wireless charging,”…

Qi (pronounced as "chee") charging is an optimized inductive charging concept also known as “wireless charging,” allowing you to charge your devices wirelessly. Compatible devices’ batteries are charged by using induction transfer without requiring separate chargers, cables or adapters... Simply place your compatible device on top of the wireless pad and watch your device charge. Finally--an end to cords!

An infrared (IR) light sensor allows the use of an Arduino to receive and decode signals from a TV remote control.

An infrared (IR) light sensor allows the use of an Arduino to receive and decode signals from a TV remote control.