Latest Audio Projects

Part One in this three-article series focuses on using the SAM4S timer/counter peripheral to precisely control the…

Part One in this three-article series focuses on using the SAM4S timer/counter peripheral to precisely control the DAC’s sampling rate.

This project explains how to isolate signals to eliminate ground loops in electronic systems.

This project explains how to isolate signals to eliminate ground loops in electronic systems.

In this article, we'll build a sound-activated switch that can be opened and closed with a double clap.

In this article, we'll build a sound-activated switch that can be opened and closed with a double clap.

This analog design allows your LEDs to respond to your music. Just plug your music source into this which sends a channel…

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.

Use a laser and a photo resistor to build a laser based point-to-point communication system. The best part? It's under $10.

Use a laser and a photo resistor to build a laser based point-to-point communication system. The best part? It's under $10.

Part 3 in the “How to Make an EFM8-Based Sound Synthesizer” series.

Part 3 in the “How to Make an EFM8-Based Sound Synthesizer” series.

Part 2 in the “How to Make an EFM8-Based Sound Synthesizer” series.

Part 2 in the “How to Make an EFM8-Based Sound Synthesizer” series.

Part 1 in the “How to Make an EFM8-Based Sound Synthesizer” series, which will design a sound synthesizer that can…

Part 1 in the “How to Make an EFM8-Based Sound Synthesizer” series, which will design a sound synthesizer that can play standard musical notes. We will accomplish this using a low-cost, small-form-factor EFM8 microcontroller in conjunction with a few external components and a speaker.

You and your friends are planning the greatest party your hometown has ever seen. Just one problem: you don't have a…

You and your friends are planning the greatest party your hometown has ever seen. Just one problem: you don't have a karaoke system. What's a great party with no karaoke? We're about to fix that. All you need are a few potentiometers and an op-amp.

Detect audio with an electret microphone and a TI CC3200 Wifi microcontroller. This handy project will allow you to set…

Detect audio with an electret microphone and a TI CC3200 Wifi microcontroller. This handy project will allow you to set up an audio detection device that can be used to catch your roommate stealing things from the fridge or send you an alert if the noise in your room goes above a certain threshold.

Build an analog booby-trap alarm system with an LM386 amplifier and an NPN transistor. This alarm system is activated by…

Build an analog booby-trap alarm system with an LM386 amplifier and an NPN transistor. This alarm system is activated by a trip sensor that sets off a screeching noise, alerting everyone and scaring off thieves.