Latest Discrete Logic Projects

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Transistor Controlled Switching of an LED Display: A Radio Shack Classics Circuit Remix

Let’s modernize a circuit from a Science Fair 150-in-1 Electronic Project kit using a solderless breadboard, new electronic components, online EDA tools, and an M5Stack Core microcontroller.

July 09, 2023 by Don Wilcher

How to Build a Digital Input and Digital Control Using Microchip’s RN487x Bluetooth Module

Learn how to use a Microchip module to prototype digital input and digital control peripherals.

October 13, 2019 by Aaron Hanson

Build Your Own Negative Voltage Generator

Everyone needs a negative voltage rail eventually, but most only have a single rail supply. This project will show you how to build a negative voltage generator that runs off a single rail supply!

June 07, 2018 by Robin Mitchell

Add Voice Commands to Your Next Project with Bluetooth LE

This project uses the Alorium Technology XLR8, a Bluetooth LE HID Implementation, and the EasyVR voice recognition module to add voice-activated movements to your next project.

May 17, 2017 by Mark Hughes

DIY Tools—Build Your Own Logic Probe

Having a logic probe handy is always a must for an electronics workshop. But instead of buying one, why not build your own for a fraction of the cost and have it working in an hour?

September 22, 2016 by Robin Mitchell

How to Build Your Own Discrete 4-Bit ALU

In this project, we will build the heart of a simple 4-bit CPU, the ALU (Arithmetic Logic Unit).

August 18, 2016 by Robin Mitchell

Build a 4-Bit Binary Counter with 5x7 LED Matrix

In this project, you'll learn how to build a 4-bit binary counter using a 5x7 LED matrix for data count value visualization. The project will use a combination of standard electronic and surface mount components.

June 20, 2016 by Don Wilcher

Digital-to-Analog Conversion with the SAM4S Peripheral DMA Controller

Part Three in this three-article series shows you how to generate values for a discrete sinusoid and continuously convert this data into an analog signal without overburdening the CPU.

May 09, 2016 by Robert Keim

Build a Desktop Industrial Automation Trainer

In this project, the reader will learn how to build and program a desktop industrial automation trainer for experimentation in robotics, motor, and process control system concepts on their workbench.

April 21, 2016 by Don Wilcher

Build Programmable Time-based Switches Using a Real Time Clock

Use DS3231M RTC alarm functions to make programmable, time-based, switches to power devices on and off at precise times.

April 07, 2016 by Raymond Genovese

Embedded PID Temperature Control, Part 2: Board-Level Integration

This article covers the firmware that allows the EFM8 microcontroller to communicate with the DAC and the MAX31855.

February 03, 2016 by Robert Keim

Download Your First Program Using ARM mbed and KEIL MDK V5

The FRDM-K64F is a development platform which utilises the MK64FN1M0VLL12 microcontroller. This tutorial includes how to download a simple blinky example onto the FRDM-K64F using the ARM mbed online IDE and KEIL MDK. Details of the GPIO module configuration are included.

December 17, 2015 by Elliott Smith

How to Use a Rotary Encoder in an MCU-Based Project

Learn how to use a rotary encoder in an Arduino project. Rotary encoders are electromechanical, electro-optical or electro-magnetic devices which convert rotational motion into digital or analog information.

November 01, 2015 by Tim Youngblood

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.

September 21, 2015 by Jens Christoffersen

How to Use the Arduino’s Digital I/O

The digital inputs and outputs (digital I/O) on the Arduino are what allow you to connect sensors, actuators, and other ICs to the Arduino . Learning how to use the inputs and outputs will allow you to use the Arduino to do some really useful things, such as reading switch inputs, lighting indicators, and controlling relay outputs.

June 05, 2015 by Tim Youngblood