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Full text of "Musical Instruments"

Laser Harp (Frameless - Open Source) 



Make] Projects 



Laser Harp (Frameless - Open 



Source) 

Written By: Ruete 



TOOLS: 

Aliaator Leads (1) 
Glued) 

Insulating tape (1) 
Lona Nose Pliers (1) 
Multimeter C\) 


PARTS: 

Protoboardd) 

Arduino Uno C\) 

Green Laser Pointer (1) 

Resistor 220 ohms 1/4W (1) 

Power Supply. 5V DC. regulated 1A 

minimum (1) 

Power Supplv. 15V DC. reaulated 5A 

minimum (1) 

Power Supply. 9V DC. regulated 1A 

minimum (1) 

ULN2003M) 
Jumper Wire (1) 
2N2222 TRANSISTOR m 
LDR Liaht Sensor (1) 
MIDI jack m 
5kTRIMPOT(1) 



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Page 1 of 4 



Laser Harp (Frameless - Open Source) 



Wine Cork Stopper (1) 
Small Mirror Piece (1) 
Green Laser Safety Goggles (1) 
White Gloves (1) 
Step motor (1) 



SUMMARY 

I felt in love with Laser Harps the first time I saw Jean Michel Jarre play it live in concert 
(Rendevous 2 song). Since technology has developed so much it is now possible to build 
your own homemade DIY Frameless Laser Harp. 



Step 1 — Laser Harp (Frameless - Open Source) 




• Testing phase from Studio. 



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Laser Harp (Frameless - Open Source) 



Step 2 



,!«S3 



f _J» 




• Here is a Fritzing drawing with all 
componentes wired using a 
solderless breadboard for 
simplicity. No soldering required. 

• List of all components is featured 
above. 



Step 3 







a^SEp 






[ \ 








**■'"■ 




X 


8w i^^^^i 


WW^B& 



• Arduino programing code: 

• // Open Source Laser Harp by Ruete // Free for home use. Comercial use proibited. // 
Circuito MIDI: // * digital in 1 conectado ao MIDI jack pin 5 (DO MIDI JACK) // * MIDI jack 
pin 2 conectado ao ground (DO ARDUINO) // * MIDI jack pin 4 (DO MIDI JACK) conectado 
ao +5V (DO ARDUINO) por urn resistor de 220-ohm int buttonPresses = 0; // quantas 
vezes a nota foi tocada int LaserState = LOW; // laser "off" int delayligado = 3; //minimo 3 
para aparecer direito o laser int delaydesligado = 3; // minimo 3 para separar direito os 
raios em 9 long previousMillis = 0; // guarda ultima vez que o 

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Laser Harp (Frameless - Open Source) 



Step 4 




• This is an open source laser harp 
project. The latest version of 
Arduino programing code can be 
downloaded at my blog. Also there 
is a video demostration there. 



Step 5 




• Any questions and improvement 
ideas are welcome. Visit my blog 
at: 

• http://harplaser.blogspot.com 



st generated on 2012-10-31 



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Page 4 of 4