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How to Build a Class-D Power Amp

Learn how to build your own Class D power amplifier—one of the most efficient ways to listen to music.

August 29, 2018 by Cezar Chirila

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

Save for Your Own Royal Wedding (of Sorts) with the Gentleman Maker’s Savings Incentivizer

In this project, we'll use a Raspberry Pi to create a responsive piggy bank that belittles you when you slack on your savings!

May 10, 2018 by Robin Mitchell

Incorporating Microphone Functionality into a Robot System

In this article, we’ll look at a fairly straightforward circuit that enables a robot or other device to detect sound.

September 11, 2017 by Robert Keim

Learn About ATmega328P Fuse Bits and How to Use Them with an External Crystal Oscillator

This project introduces ATmega328P fuse bits and shows how to set them to use an external 16 MHz crystal oscillator.

August 03, 2017 by Charles R. Hampton

The Holiday Season Analog Alarm! A Gift-Defending System

Nowhere to hide presents this holiday season? No problem! This alarm will sound anytime a loved one tries to get a sneak peek at his or her surprise.

December 05, 2016 by Ryan Jones

Raspberry Pi Object Detection Cat Toy

This object detection toy will keep your cat's head spinning for hours!

November 07, 2016 by Ryan Jones

Build Your Own LED Saber—Audio and Power Systems

In part 2 of the LED saber project, we'll assemble the power and audio systems.

October 19, 2016 by Jeremy Lee

Build Your Own Metal Detector with an Arduino

Building a metal detector using a Colpitts oscillator and an Arduino.

October 03, 2016 by Evan Kale

Build an Arduino BLE-Enabled Indoor Air Quality Monitor

Use an Arduino/Genuino 101 with iAQ-Core air quality and HIH-6131 temperature/humidity sensors to make an Indoor Air Quality Monitor with Bluetooth low energy (BLE) connectivity.

September 16, 2016 by Raymond Genovese

Measuring Temperature with an NTC Thermistor

For this article, we are only concerned with one type of sensor that can measure temperature. This sensor is called a thermistor.

August 15, 2016 by Joseph Corleto

DIY Synth Series Part 1 — The Exponential VCO

Build a 1V octave voltage-controlled oscillator (VCO) module and create your own analogue synth sounds.

August 08, 2016 by Robin Mitchell

How to Build an Arduino-Controlled AM/FM/SW Radio

Combine the Si4844-A10 analog-tuned radio receiver with an Arduino to make a full-featured multiband radio.

May 26, 2016 by Raymond Genovese

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

C-BISCUIT Power: 5V 3A Buck Regulator for Wandboard

Design and theory behind the 5V-3A buck regulator based on the LM25575 to be used in the C-BISCUIT robot project.

February 26, 2016 by Patrick Lloyd

Create a Laser Detection System Using a PICAXE

Lasers are plentiful, inexpensive, and fun to use. Here's a target that reacts when it's hit by a laser beam.

February 16, 2016 by Charles R. Hampton

Embedded PID Temperature Control, Part 1: The Circuit

Invoke the power of the PID (proportional–integral–derivative controller)! The key components in this design are an EFM8 microcontroller, a DAC, and the MAX31855 thermocouple-to-digital converter.

February 01, 2016 by Robert Keim

Design a Luxmeter Using a Light Dependent Resistor

Take a few minutes to characterize a light dependent resistor (LDR) and you can build a simple and reasonably accurate light meter can be built using an LDR and an Arduino.

December 13, 2015 by David Williams

Make an Analog Sound Reactive LED Strip

This analog design allows your LEDs to respond to your music. Just plug your music source into this which sends a channel to your sound system and some LEDs.

October 28, 2015 by Fadi Kasem

Predicting Battery Degradation with a Trinket M0 and Python Software Algorithms

Learn how to build a setup that will help you predict a battery's performance as it ages using a Trinket M0 and software algorithms.

December 09, 2019 by Aaron Hanson

How to Build an Analog Sensor and Analog Output Using Microchip’s RN487x Bluetooth Module

Learn how to hook up an analog input (potentiometer) and output (LED) using a Microchip BLE module.

October 21, 2019 by Aaron Hanson

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 Voice-Activated Home Automation System with the Gentleman Maker’s Posh Butler

Learn how to use a Raspberry Pi to make your own posh home automation system!

February 24, 2019 by Robin Mitchell

Never Run Out of Tea Again! How to Build the Gentleman Maker’s Intelli-T Raspberry Pi Sensor Alarm

Never run out of tea again! The Intelli-T uses a weight sensor and a Raspberry Pi to alert you when your tea supply is running low.

February 12, 2019 by Robin Mitchell

How to Design a Precise Inclinometer on a Custom PCB

Learn the design steps for creating your own custom inclinometer PCB.

January 08, 2019 by Mark Hughes

Put an End to Stockings Full of Coal with the Raspberry Pi Santa Detector

For most, the name "Father Christmas" conjures images of toys and gadgets. But for this gentleman maker, the name brings misery. Be sure to stockpile your Arduino, Raspberry Pi, and Particle Photons; it's time to catch Saint Nick red-handed.

December 21, 2018 by Robin Mitchell

How to Make Your Umbrella into a Weather Station with a Particle Photon

Want to get to-the-minute, location-specific weather information delivered right to your own Adafruit IO dashboard? It's time to assemble your very own SmartBrella.

December 13, 2018 by Robin Mitchell

Make Your Own Home Brewing Sensor Kit with the Gentleman Maker’s Adafruit IO SmartBrewer

Have a party coming up in the next few weeks that you want to make extra posh? Try making your own extra-special brew with the Gentleman Maker's SmartBrewer! Make sure you have an Adafruit IO account ready to go and your Particle Photon on hand.

December 06, 2018 by Robin Mitchell

Protect Your Personal Castle With the Gentleman Maker’s Photon Trebuchet

In this Gentleman Maker project, we will use Particle Photon boards to power a motion-sensing trebuchet that can fend off all your mischievous intruders.

September 27, 2018 by Robin Mitchell

How to Design a Super Simple Sensor System for Industrial Monitoring Applications

This article describes an Ethernet-connected subsystem of a larger modular sensor system designed for industrial or smart home sensing and monitoring. We will discuss a custom sensor subsystem developed for this application.

September 12, 2018 by Mark Hughes

How to Build a Class-D Power Amp

Learn how to build your own Class D power amplifier—one of the most efficient ways to listen to music.

August 29, 2018 by Cezar Chirila

Protect Your Summer Harvest with the Gentleman Maker’s Raspberry Pi and Arduino Dog Corrector

In this episode of the Gentleman Maker, we're using a Raspberry Pi and an Arduino Uno to stave off the onslaught of dogs trying to eat every single plant in our garden.

August 09, 2018 by Robin Mitchell

Hardware Assessment: OPB9000 Reflective Light Sensor from TTElectronics

The OPB9000 is a reflective light sensor from TTElectronics with programmable output and sensitivity levels.

July 27, 2018 by Mark Hughes

Hardware Assessment: LightCrafter Evaluation Kit for BeagleBoard Black from Texas Instruments

The Texas Instruments DLPDLCR2000EVM is a demonstration cape designed to plug into a BeagleBone Black (BBB) and provide instant-on projection capabilities using a digital micromirror device and a relatively high-power RGB LED.

July 09, 2018 by Mark Hughes

How To Control a DC Motor with an Arduino

By connecting an L298 bridge IC to an Arduino, you can control a DC motor.

July 07, 2018 by Tim Youngblood

Feeling Flashy? Tone It Down with the Gentleman Maker’s Raspberry Pi Colorboringizer

In this episode of the Gentleman Maker, we'll use a Raspberry Pi 3 Model B, an Arduino Nano, and an Arduino Uno to create a handy system to rid ourselves of overly-colorful fashion choices.

July 05, 2018 by Robin Mitchell

A Simple, Compact Power Supply for Analog and Mixed-Signal Systems

This project demonstrates and discusses the performance and functionality of an inductorless ±5 V power-supply circuit.

June 18, 2018 by Robert Keim

Take a Gander at Wildlife with Your Raspberry Pi: The Gentleman Maker’s Life-Cam!

In this project, we’re using an Arduino Uno and a Raspberry Pi 3 Model B to create an automatic wildlife camera. And, as an added bonus, this camera works at night. Make one of your own to snap photos of local birds, parading pups, or sneaky humans.

June 15, 2018 by Robin Mitchell

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