Arduino Noise [Four Step Sequencer]


This is a demo video for an intermediate stage of a 4 step sequencer that I have built using an Arduino Uno and the Mozzi library.

The synth right now also has an LFO and Reverb mode but has not been demo-ed in the video.

It is very easy to build once you know the concepts of sound synthesis. All you need is an arduino, some knobs, a baterry and a Soap Box to put them all in 🙂

Source Code needs some cleaning up and will be put up soon 🙂

Add some LEDs and LDRs to it and you have a blingy noise box!


using LDT0-028K with an arduino as an impact sensor

For a project that I am working on I had to use a piezo sensor to detect impact of falling water on a surface. I bought the LDT0-028K from protocentral (excellent service, btw).

I had initial hiccups in getting started and had to read through the techincal manual to get started. I could not find much on googling, So I thought I’d put it here for someone who uses the right words on google search.

You need to connect the piezo in parrallel with a 1M ohm resistor. Well thats all!

This is what I could get : On setting threshold of 60, I could detect impact of a stream of water falling on a box. Upon breaking the fall of the water by putting your hand midway, the sensor would switch off.

Here is my setup (sorry for the bad pictures)

2013-10-19 12.49.43 2013-10-19 12.49.50 2013-10-19 12.49.57 2013-10-19 12.50.04



Arduino Code :

int sensorPin = A0;
int ledPin = 13;
int sensorValue = 0;

void setup() {
pinMode(ledPin, OUTPUT);

void loop() {
sensorValue = analogRead(sensorPin);
if (sensorValue >70){
digitalWrite(ledPin, HIGH);

digitalWrite(ledPin, LOW);

The Sea Chord



Still struggling with a way to record this but it sounds nice. Three oscillator with oscillating amplitudes; frequencies of the oscillator controlled by the Light falling on the LDRs

Finally! Arduino+Sound

Hooked up an old abandoned Computer Speaker’s speaker to an arduino. Its a high power speaker and not the one you generally find in hobby projects. I think thats why the sound was really cool.

This being the first time I am dealing with hardware, I was thrilled to see the speaker come to life 🙂