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Using a Serial LCD with a PICAXE

Using a Serial LCD with a PICAXE

Using an LCD increases the versatility of any microcontroller by displaying data outputs and memory contents. This serial adapter uses only one I/O.


How to Use RTC with Arduino and LCD

How to Use RTC with Arduino and LCD

This article will show you one way of making an accurate clock by using the Real Time Clock IC DS1307. The time will be shown on a LCD display.


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.


An LCD for Your Microcontroller Using a Single I/O

An LCD for Your Microcontroller Using a Single I/O

LCDs are great for showing info from your microcontroller. A serial adapter is inexpensive, uses only one I/O, and is easy to connect and to use.


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
BLE using nRF51: ARM-GCC Build Environment

BLE using nRF51: ARM-GCC Build Environment

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


Upgrade Your Power Wheels with Motor Control Basics

Upgrade Your Power Wheels with Motor Control Basics

Adding variable speed control and battery monitoring to a Power Wheels truck!


EFM8 Sound Synthesizer: Driving the Speaker

EFM8 Sound Synthesizer: Driving the Speaker

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


Projects Sep 11, 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
Ambient Light Monitor: Using a Triac to Adjust Lamp Brightness

Ambient Light Monitor: Using a Triac to Adjust Lamp Brightness

Part 5 in the “How to Make an Ambient Light Monitor” series.


Projects Sep 01, 2015 by Robert Keim
An Introduction to the Wunderbar

An Introduction to the Wunderbar

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.


Projects Aug 29, 2015 by Patrick Lloyd
Getting Started with PSoC®

Getting Started with PSoC®

Getting started with PSoC®, the Programmable-System-on-Chip by Cypress Semiconductor for developing and testing embedded systems.


Make an Automatic Water Softener Reporter

Make an Automatic Water Softener Reporter

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


How to Use the Digital I/O on a BeagleBone

How to Use the Digital I/O on a BeagleBone

Beaglebone Black is the most recent incarnation of the Beaglebone open source hardware platform. For less than $50, the board includes Ethernet, graphics processing, 4Gb of nonvolatile storage, and ports supporting USB, HDMI, and Beaglebone's custom I/O add-ons, called "capes". Here's how to run some simple commands to toggle digital I/O on the board!


Projects Aug 17, 2015 by Nash Reilly
Ambient Light Monitor: Zero-Cross Detection

Ambient Light Monitor: Zero-Cross Detection

Part 4 in the “How to Make an Ambient Light Monitor” series


Projects Aug 16, 2015 by Robert Keim
How to Use MAX232 to Communicate Between a PIC and a PC

How to Use MAX232 to Communicate Between a PIC and a PC

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


Build an Audio Mixer

Build an Audio Mixer

You and your friends are planning the greatest party your hometown has ever seen. Just one problem: you don't have a karaoke system. What's a great party with no karaoke? We're about to fix that. All you need are a few potentiometers and an op-amp.


Projects Aug 11, 2015 by Jacob Smith
Build a Thermocouple Amplifier and Custom KiCad Libraries

Build a Thermocouple Amplifier and Custom KiCad Libraries

Building on skills developed in the introductory KiCad tutorial, this article will focus on creating custom parts and adding them to a local library, expanding the default libraries to include community repositories, and contributing parts back into the open source ecosystem. The end product will be a MAX31855 K-type thermocouple amplifier which can be used for a huge array of temperature sensing projects.


Projects Aug 10, 2015 by Patrick Lloyd