Design a wideband analog multimeter to measure AC voltages and currents from 20 Hz to 1 MHz with a selectable sensitivity from 1 mV to 100 V, while the ammeter has a selectable current sensitivity of 10 mA to 10 A.
May 03, 2023 by John Woodgate
This article explains the theory and the construction of the circuit of a 10W practice guitar amplifier.
November 29, 2020 by Teja Sai Marellapudi
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
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
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
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
In this how-to article, we explore the use of I2C EERAM to save critical program variables when power fails and restore them when power returns to easily preserve program continuity.
August 07, 2017 by Raymond Genovese
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
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
This object detection toy will keep your cat's head spinning for hours!
November 07, 2016 by Ryan Jones
In part 2 of the LED saber project, we'll assemble the power and audio systems.
October 19, 2016 by Jeremy Lee
Building a metal detector using a Colpitts oscillator and an Arduino.
October 03, 2016 by Evan Kale
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
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
Build a 1V octave voltage-controlled oscillator (VCO) module and create your own analogue synth sounds.
August 08, 2016 by Robin Mitchell
Combine the Si4844-A10 analog-tuned radio receiver with an Arduino to make a full-featured multiband radio.
May 26, 2016 by Raymond Genovese
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
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
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
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
Don't have an AAC account? Create one now.
Forgot your password? Click here.