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The Voice Echo: An Arduino Audio Project

The Voice Echo: An Arduino Audio Project

This project brief explains how to construct a PCB-based audio-processing platform with an ATmega328 microcontroller. A link to Arduino code for creating an audio echo is also provided.


The Kilo Lamp: An Interactive Lamp Controller

The Kilo Lamp: An Interactive Lamp Controller

This project brief provides the instructions for building a weight-sensitive LED lamp with an Arduino Uno and a handful of commercially available parts.


Using the Arduino Uno Q to Build a DDS Sine Wave Generator

Using the Arduino Uno Q to Build a DDS Sine Wave Generator

In this project, we'll construct and test a microcontroller-based system that digitally generates analog signals.


Projects Apr 19, 2026 by Don Wilcher
Building a Push-Pull Level Shifter to Connect an MCU and a Low-Voltage Display

Building a Push-Pull Level Shifter to Connect an MCU and a Low-Voltage Display

In this project, we'll build and demonstrate a discrete analog solution to the incompatible logic levels of an Arduino Uno and an Elecrow e-paper HMI display.


Projects Nov 23, 2025 by Don Wilcher
Programming Your Standalone Hardware Soundboard

Programming Your Standalone Hardware Soundboard

In Part 2 of this two-part series, we turn our hardware assembly into a functioning soundboard by adding the necessary code in Arduino IDE and uploading soundbites.


Craft Your Own Hardware Soundboard Using an Arduino Microcontroller

Craft Your Own Hardware Soundboard Using an Arduino Microcontroller

Learn how to turn an ATmega328 microcontroller and an assortment of readily available parts into a dedicated hardware soundboard.


Upgrading My Retro Handheld Gaming Console with Motion Control and an LCD

Upgrading My Retro Handheld Gaming Console with Motion Control and an LCD

Follow my upgrade of a handheld game controller as I add a new 1.8-inch color LCD for animated graphics and an accelerometer module for motion control input.


Building a Resistor Color Code Calculator and Ohmmeter Using Arduino

Building a Resistor Color Code Calculator and Ohmmeter Using Arduino

For this project, I built a handheld resistor color code calculator and ohmmeter using the ATmega328 microcontroller and a 1.8-inch color LCD display.


The Wireless Alphabet Flasher: A Radio Shack Classics Circuit Remix

The Wireless Alphabet Flasher: A Radio Shack Classics Circuit Remix

In this project, we mix the old and the new by integrating present-day BLE technology with a vintage Science Fair computer kit.


Projects Jul 21, 2024 by Don Wilcher
Shake It Off! A Digital Drawing Pad Inspired by the Iconic Etch A Sketch

Shake It Off! A Digital Drawing Pad Inspired by the Iconic Etch A Sketch

In this project, which uses the Arduino IDE, we create and demonstrate a digital drawing pad using an ESP32-based e-paper display dev board, rotary encoders for drawing control, and an accelerometer for shake detection to initiate an erase.


Building a Handheld Retro Gaming Console With Local Wireless Connectivity

Building a Handheld Retro Gaming Console With Local Wireless Connectivity

In this project article, we design a handheld gaming console with wireless multiplayer functionality using ESP8266 microcontrollers. We then program a game for it with the Arduino IDE.


Building and Certifying an Open-Source IoT Controller, Part 3: Manufacturing and Testing

Building and Certifying an Open-Source IoT Controller, Part 3: Manufacturing and Testing

This four-part series walks through the development of the Anthilla Controller, an open-source Internet of Things (IoT) hardware platform. In Part 3, we cover the manufacturing, assembly, and product testing of the board.


Creating a DCO-based Audio Synthesizer With an Arduino Nano

Creating a DCO-based Audio Synthesizer With an Arduino Nano

In this project, learn to create a digitally-controlled oscillator or DCO-based audio synthesizer with an Arduino Nano or an Arduino Uno.


Projects Apr 09, 2023 by Darby Hewitt
TinyML In Action—Creating a Voice Controlled Robotic Subsystem

TinyML In Action—Creating a Voice Controlled Robotic Subsystem

We’ll be walking you through creating a robotic subsystem with a voice-activated motor leveraging machine learning (ML) and an Arduino Nano 33 BLE Sense.


Projects Jul 03, 2022 by Jake Hertz
Understanding ASCII in Embedded Firmware Development

Understanding ASCII in Embedded Firmware Development

This article, which serves as preparation for a discussion of C-language strings, introduces the concept of ASCII characters and explains two benefits of ASCII-based coding techniques.


Five Tips for Using Functions in C-Language Firmware

Five Tips for Using Functions in C-Language Firmware

In this article we’ll conclude our exploration of C functions with some additional information and a few useful implementation techniques.


How to Use Pointers in C-Language Firmware

How to Use Pointers in C-Language Firmware

In this article we’ll discuss pointer operators, pointer arithmetic, and two situations in which pointers can improve your code.


How to Incorporate Functions into Embedded Firmware

How to Incorporate Functions into Embedded Firmware

This article explains why you should use functions in your C-language code and discusses situations in which functions are particularly helpful.


What Are Functions in C Programming?

What Are Functions in C Programming?

This article will help you to understand what functions are, why they are used, and how they are implemented in embedded hardware.


Pointers in C Programming: What Is a Pointer and What Does It Do?

Pointers in C Programming: What Is a Pointer and What Does It Do?

This article will help you to understand the pointer, which is an interesting and important aspect of the C language.