An Arduino sound project, Diver is an instrument inspired by old Analog Sequencers and Theremins. It allows creating a four-note looped melody which can be manipulated in real-time with knobs that can assign upto 5 octaves for each note. Each knob lights up to indicate it’s position in the loop.

The top of Diver houses a sensor which can be used to control the tempo of the loop in real-time. Use Diver in live performances or at home to produce awesome loops, melodies and special effects.

Sales Sheet

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Second prototype for the theremin style instrument. It is more of a sequencer now with 4 POT’s for changing frequencies in a looped melody and a sensor changing the tempo.

Tweetlite is a visual commentary on our relationship with online social networks. It is an ambient light that represents a pixel – the smallest unit of visual digital information.

This is represented in the form of a minimalist, 4″ white, plexiglass, cube that reads messages from a Twitter feed and displays them in Morse code.

Each message is displayed in a different color and makes for a great mood light. It has USB and power connectivity and comes with a program that is used to enter Twitter credentials to enable the data feed visualization. It needs to be connected to a computer with an Internet connection, via USB. The patterns and colors can be customized. Needless to say, it can be of great use to someone who can read, interpret or even want to learn Morse code.

It is powered by Arduino and Python. The code is based off of example found here. If anyone is interested in building one I can post a tutorial, let me know.

Sales sheet – long

Sales sheet – short

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This was part of a student lecture in the computation class. We discussed PWM and applying it to multiple LED’s and tri-color LED’s. Here’s pcitures and code for the 2 circuits I built and presented in class.

Multiple LED’s with PWM

Code:

int value = 0; // variable to keep the actual value<br /> int pins[] = {9, 10, 11}; // light connected to digital pin 9<br /> int numPins = 3;</p> <p>void setup()<br /> {<br /> // nothing for setup<br /> }</p> <p>void loop()<br /> {<br /> int i;</p> <p>for (i=0; i < numPins; i++)<br /> {<br /> for(value = 0 ; value <= 255; value+=5) // fade in (from min to max)<br /> {<br /> analogWrite(pins[i], value); // sets the value (range from 0 to 255)<br /> delay(30); // waits for 30 milli seconds to see the dimming effect<br /> }<br /> }<br /> int j;<br /> for (j=numPins-1; j >= 0; j–)<br /> {<br /> for(value = 255; value >=0; value-=5) // fade out (from max to min)<br /> {<br /> analogWrite(pins[j], value);<br /> delay(30);<br /> }<br /> }<br /> }</p> <p>

Tri-Color LED

Code:

// light connected to digital pin 9, 10, 11<br /> int pins[] = {9, 10, 11};</p> <p>void setup()<br /> {<br /> // nothing for setup<br /> }</p> <p>void loop()<br /> {<br /> // variable to keep the actual value<br /> int value = 0;</p> <p>//variables to check if fade in for a color is complete<br /> int fadedIn1 = 0;<br /> int fadedIn2 = 0;<br /> int fadedIn3 = 0;</p> <p>//variables to check if fade out for a color is complete<br /> int fadedOut1 = 0;<br /> int fadedOut2 = 0;<br /> int fadedOut3 = 0;</p> <p>//fade in blue<br /> if (fadedIn1 != 1){<br /> for(value = 255; value >=0; value-=5)<br /> {<br /> analogWrite(pins[1], value);<br /> delay(60);<br /> fadedIn1 = 1;<br /> }<br /> }</p> <p>//fade in green<br /> if (fadedIn2 != 1){<br /> for(value = 255; value >=0; value-=5)<br /> {<br /> analogWrite(pins[0], value);<br /> delay(60);<br /> fadedIn2 = 1;<br /> }<br /> }</p> <p>//fade in red<br /> if (fadedIn3 != 1){<br /> for(value = 255; value >=0; value-=5)<br /> {<br /> analogWrite(pins[2], value);<br /> delay(60);<br /> fadedIn3 = 1;<br /> }<br /> }</p> <p>//fade out red<br /> if (fadedOut1 != 1){<br /> for(value = 0; value <=255; value+=5)<br /> {<br /> analogWrite(pins[2], value);<br /> delay(60);<br /> fadedOut1 = 1;<br /> }<br /> }</p> <p>//fade out green<br /> if (fadedOut2 != 1){<br /> for(value = 0; value <=255; value+=5)<br /> {<br /> analogWrite(pins[0], value);<br /> delay(60);<br /> fadedOut2 = 1;<br /> }<br /> }</p> <p>//fade out blue<br /> if (fadedOut3 != 1){<br /> for(value = 0; value <=255; value+=5)<br /> {<br /> analogWrite(pins[1], value);<br /> delay(60);<br /> fadedOut3 = 1;<br /> }<br /> }</p> <p>}</p> <p>

I added switches to the fourth iteration of the passage of time. 1 rocker switch for on/off, 1 toggle switch which switches between 2 patterns, 1 momentary pushbutton switch that changes the pattern when the toggle switch is up. The switches are mounted on a separate short box with holes drilled using the dremel tool and attached to the bottom of the taller box. All the switches are hooked up to the Arduino using a breadboard.

Passage of time with switches from Bruce Drummond on Vimeo.