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Topic: Laser Lissajous with Audio Sync using Arduino (clone) and Python (Read 1 time) previous topic - next topic

mkvenkit

Hello,

I'd like to submit a project that I recently completed.

This project uses a laser pointer and a couple of motors with attached mirrors to display patterns (lissajous figures) that are in sync with music. The audio data is processed by a Python script that extracts frequency information, converts that to motor pulses and send it to the Arduino (clone) via the serial interface.

I have a complete write-up here, which also has a video:

http://makeprojects.com/Project/Laser+Lissajous+with+Audio+Sync/2840/1#.UL2CzYb5OP8

Regards

m0rgo

It may be pretty, but I would challenge your claim that it is a Lissajous figure.

A Lissajous pattern is created by two sinusoidal waveforms with a 90 degree phase shift.

This gives various patterns depending on the interaction of the two sine waves and their phase relationship.

A 2 to 1 relationship, for example would result in a figure of eight shape.

Whereas, your project, although interesting, is not going to show this, just a circular pattern that jumps around in an irritating manner.

sbright33

I did something similar in 1985 using DC motors and PLL to control the phase between the 2 motors so the spirograph image will remain stable.  How can I do this today using stepper motors?  It would be jerky? 
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libelle

Isn't there a way you could tune it? The output appears to be too random for it to accurately represent a musical interpretation. Sorry to add to the Debbie Downer list.

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