Latest Projects

This project brief explains how to construct a PCB-based audio-processing platform with an ATmega328 microcontroller. A…

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.

This project brief provides the instructions for building a weight-sensitive LED lamp with an Arduino Uno and a handful…

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

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

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

Learn how to create a batteryless crawling robot using basic electronic components and a 3D-printed chassis.

Learn how to create a batteryless crawling robot using basic electronic components and a 3D-printed chassis.

To complete this project, we add backlight control and temperature-sensing functionality to the clock we built in the…

To complete this project, we add backlight control and temperature-sensing functionality to the clock we built in the previous installments.

We continue our design of a clock that uses analog ammeters to display time and temperature. In this installment, we…

We continue our design of a clock that uses analog ammeters to display time and temperature. In this installment, we examine the second of the two circuits that enable the timekeeping function.

This project turns old-school analog ammeters into a working clock that can also display the ambient temperature.

This project turns old-school analog ammeters into a working clock that can also display the ambient temperature.

In this project, we'll build and demonstrate a discrete analog solution to the incompatible logic levels of an Arduino…

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.

We use a Raspberry Pi and free software to build a test platform for IoT systems.

We use a Raspberry Pi and free software to build a test platform for IoT systems.

In Part 2 of this two-part series, we turn our hardware assembly into a functioning soundboard by adding the necessary…

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.

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

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

In this project article, we'll use a 555 timer IC to build an iconic musical instrument from the early days of synthesizers.

In this project article, we'll use a 555 timer IC to build an iconic musical instrument from the early days of synthesizers.

In this project article, we’ll create a programmable device that alerts users to changes in ambient light levels. Along…

In this project article, we’ll create a programmable device that alerts users to changes in ambient light levels. Along the way, we’ll learn about astable multivibrators and the Darlington pair.

Follow my upgrade of a handheld game controller as I add a new 1.8-inch color LCD for animated graphics and an…

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.

For this project, I built a handheld resistor color code calculator and ohmmeter using the ATmega328 microcontroller and…

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.

In this Radio Shack Classic Circuits Remix, we add modern microcontroller functionality to the vintage Electronic Timer…

In this Radio Shack Classic Circuits Remix, we add modern microcontroller functionality to the vintage Electronic Timer project for the Science Fair 65-in-1 kit.

Learn how to implement finite-state machines in VHDL by creating a 4-bit binary counter. After compiling, it will run on…

Learn how to implement finite-state machines in VHDL by creating a 4-bit binary counter. After compiling, it will run on an Altera CPLD development board connected to a custom PCB with input switches and an LED display.

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

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

This project covers two fascinating and useful circuit design techniques—the Burton Transform and Dualling—that allow…

This project covers two fascinating and useful circuit design techniques—the Burton Transform and Dualling—that allow us to transform a passive network into an active network while building an audio noise filter.