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Make a Wireless Thermometer with Arduino

Make a Wireless Thermometer with Arduino

Learn how to use a 433MHz RF module with an ATMega 328P-PU. In this article, we'll make a circuit with a DHT11 sensor and a RF transmitter. We'll also make a receiving circuit with a 433MHz RF receiver and an LCD display.


Update the Firmware in Your ESP8266 Wi-Fi Module

Update the Firmware in Your ESP8266 Wi-Fi Module

Updating the firmware in an ESP8266 Wi-Fi module can be frustrating! Here's a procedure to reduce the pain.


Read and Write on NFC Tags with an Arduino

Read and Write on NFC Tags with an Arduino

Learn to use an Arduino to read NFC tags and write information on them! Near field communication protocols are what electronic devices can use to communicate and transfer data between each other.


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
Breadboard and Program an ESP-01 Circuit with the Arduino IDE

Breadboard and Program an ESP-01 Circuit with the Arduino IDE

The ESP8266 combination microcontroller/Wi-Fi modules can now be programmed using the Arduino IDE. Here's how!


Incorporating Wireless Power with IDT’s Tx/Rx Reference Kits

Incorporating Wireless Power with IDT’s Tx/Rx Reference Kits

Two evaluation boards from IDT help you to quickly and conveniently integrate wireless power into your designs.


Projects Oct 15, 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.


Make a BLE Temperature Sensor with the nRF51

Make a BLE Temperature Sensor with the nRF51

This article demonstrates how to use the built-in die temperature sensor on the nRF51. The die temperature is not the same as ambient temperature, but can be calibrated to ambient temperature by using a correction factor.


A Builder’s Guide to Buying Electronics on eBay

A Builder’s Guide to Buying Electronics on eBay

It's never been cheaper to round up a ton of quality hardware for open source projects! Here's what you need to know about the eBay experience.


Learning to Simplify: Thevenin and Norton Equivalent Circuits

Learning to Simplify: Thevenin and Norton Equivalent Circuits

This article reviews the basics of finding Thevenin and Norton equivalents and discusses how to apply Thevenin's theorem to a practical circuit.


How to Build a Web-based Garage Door Controller

How to Build a Web-based Garage Door Controller

Use your Android device to open and close your garage door! Much better than that clunky remote you've been using.


Light Bar “Relative Comfort” Thermometer with NodeMCU

Light Bar “Relative Comfort” Thermometer with NodeMCU

Create a wireless "relative comfort" light bar thermometer by broadcasting temperature data across multiple ESP8266 modules running NodeMCU using MQTT.


Projects Sep 28, 2015 by Patrick Lloyd
How to Add Bluetooth to a Ceiling Fan

How to Add Bluetooth to a Ceiling Fan

How to add BLE capabilities to a wireless ceiling fan by incorporating the nRF51 in the remote control. Part of our series on the nRF51.


Introduction to FreeRTOS on the nRF51

Introduction to FreeRTOS on the nRF51

This article demonstrates porting FreeRTOS to the nRF51 with a softdevice so you can use an RTOS with the BLE functionality.


The New Wireless Thread Network Protocol

The New Wireless Thread Network Protocol

Thread, a network protocol released July 2015, is optimized for the connected home network. It is IPv6 based, uses IEEE Standard 802.15.4 and runs on existing hardware.


BLE using nRF51: Creating a BLE Peripheral

BLE using nRF51: Creating a BLE Peripheral

How to create a custom BLE GATT peripheral using the nRF51 by creating a service and characteristics.


How to Communicate with a Custom BLE using an Android App

How to Communicate with a Custom BLE using an Android App

Learn how to communicate with a custom BLE peripheral using an Android device.


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
Introduction to the MQTT Protocol on NodeMCU

Introduction to the MQTT Protocol on NodeMCU

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.


Projects Sep 15, 2015 by Patrick Lloyd