relays to make lights to pulse to music?

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b1b2b3

Member - Posts: 21

Joined: November 21, 2008

Location: Australia

Posted: January 09, 2009 at 1:04 AM / IP Logged

Hi all,

I was wondering, would it be possible to adapt this 'special application' of relays - https://www.the12volt.com/relays/page5.asp#rtol - to be able to turn lights on and off to the beat of the music?

The way I would do this is to splice a new wire onto one speaker wire, and use this as the signal lead (pin 86), and then the other pins will remain as standard (pin 85 ground, pin 87 12V and pin 30 to the lights).

Will this work?

Thanks

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i am an idiot

Platinum - Posts: 13,670

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: January 09, 2009 at 1:58 AM / IP Logged

No.

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b1b2b3

Member - Posts: 21

Joined: November 21, 2008

Location: Australia

Posted: January 09, 2009 at 2:03 AM / IP Logged

i am an idiot wrote:

No.

Why not?

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i am an idiot

Platinum - Posts: 13,670

Joined: September 21, 2006

Location: Louisiana, United States

Posted: January 09, 2009 at 2:09 AM / IP Logged

For one, the relay you are wanting to use has a coil rated at 12 Volts DC. The signal coming out of your amp is AC Voltage.

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KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: January 09, 2009 at 8:11 AM / IP Logged

An electromechanical relay also won't work for this applicaiton because of it's slow switching speed.

You'll need an interface circuit that is triggered by the music (I would sugguest somehow tapping in to the low level signal, not the speaker output) and then controls either a solid state relay or a transistor output.

Kevin Pierson

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hotwaterwizard

Silver - Posts: 1,350

Joined: December 11, 2003

Location: California, United States

Posted: January 11, 2009 at 4:38 PM / IP Logged

12v_color_organ.gif

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

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relays to make lights to pulse to music?

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