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Frankenstein's Fix: Troublesome Psychedelics

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Caleb Kraft
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my first
Caleb Kraft   10/15/2013 4:21:59 PM
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I'm pretty sure my first electronics project was a color organ kit. I was probably 9 years old. Thought it was freaking AMAZING.

zeeglen
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Re: my first
zeeglen   10/15/2013 10:23:55 PM
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Never had a color organ, instead used a defunct small TV (with CRT still working) with an additional yoke (deflection coil assembly) driven from a pair of 6L6 in pushpull, the vertical winding through a few tens of uF for bass phase shift.  The resulting Lissajous figures, when projected onto a wall through a 4" magnifying glass, were truly mesmerizing. The harmonics of Black Sabbath created some really interesting Lissajous figures with curls in the corners of rectangles; my buddies would sit transfixed for hours staring at the pulsating patterns projected onto the  wall.  Always wanted to do the same thing with a color TV, but never got a round tuit.

Ahhh, the gudoldaze...

David Ashton
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Re: my first
David Ashton   10/16/2013 4:59:22 AM
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@Glen....Gudoldaze and Round Tuits....now you've got me reminiscing.  I built a colour organ from a Practical Electronics article.  It had 3 9V-240V transformers with the 9V windings across the speaker outputs and the 240V windings driving SCRs which drove the lights.  One 240V winding had a cap across it, and one a cap in series to do the frequency selection.  It had a 20R pot in series with the speaker connection as an intensity control.   Hideously crude, but it worked.  I hate to think what it did to the speaker impedance presented to the amp.....and I think it needed a couple of watts to drive it.  I had it in my junk store, meaning to redesign it, for years but got rid of it when I left ZImbabwe.  Probably just as well, I certainly don't have time now....

David Ashton
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Re: my first
David Ashton   10/16/2013 5:04:03 AM
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BTW...love your Lissajous TV idea....must have been awesome...

kfield
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Re: my first
kfield   10/16/2013 10:10:34 AM
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@zeeglen Glen, I just gotta ask: Were you also into tie-dyed fashion?

Max The Magnificent
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Re: my first
Max The Magnificent   10/16/2013 4:27:53 PM
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@kfield: Were you also into tie-dyed fashion?

You make it sound like tie-dye has gone out of fashion!

kfield
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Re: my first
kfield   10/21/2013 11:51:42 AM
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@maxthemagnificent  Ah Max, I failed to remember that tie dye will NEVER go out of fashion for you. As for very wide bell bottoms, I hope you've tossed those!

Max The Magnificent
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Re: my first
Max The Magnificent   10/21/2013 12:36:24 PM
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@kfield: Ah Max, I failed to remember that tie dye will NEVER go out of fashion for you. As for very wide bell bottoms, I hope you've tossed those!

Toss them? Never! I'm just waiting for them to come back into style (as is the case with most of my clothes :-)

zeeglen
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Re: my first
zeeglen   10/16/2013 7:29:57 PM
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@kfield  No, I was more the grungy bluejeans type.  But you reminded me of a story.  Was in the college ham radio shack with my girlfriend and texting with someone in the USA.  (Back then we called it "teletype").  He asked if the streaking craze had caught on up in Canada yet; we didn't know what he meant.  My girlfriend suggested he might be referring to tie-dying, which I had never heard of.  Of course, on the "over" I asked, and found out what "streaking" meant.  And yes, it did catch on quickly.

elctrnx_lyf
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Re: my first
elctrnx_lyf   10/19/2013 9:24:28 AM
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Seems like an interesting story for any time.

Caleb Kraft
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Re: my first
Caleb Kraft   10/16/2013 4:40:36 PM
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Man, that sounds really cool. I'd love to see this contraption!

David Ashton
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Re: my first
David Ashton   10/16/2013 5:53:00 PM
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@Glen, Caleb I was just thinking that these day's you'd use lasers and mirror galvanometers or something similar to do that.  Then I remembered I rescued some bar code readers from the trash not long ago.  They have a laser in and some kind of deflection mechanism for the scan.   I just have to get the other 10 000 things done that I need to do, then I'll look at doing something with that.,,,,

Caleb Kraft
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Re: my first
Caleb Kraft   10/16/2013 5:54:55 PM
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Yep fairly common for people to tape tiny mirrors to their speakers for some home made light effects. 

David Ashton
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Re: my first
David Ashton   10/16/2013 5:53:24 PM
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@Glen, Caleb I was just thinking that these day's you'd use lasers and mirror galvanometers or something similar to do that.  Then I remembered I rescued some bar code readers from the trash not long ago.  They have a laser in and some kind of deflection mechanism for the scan.   I just have to get the other 10 000 things done that I need to do, then I'll look at doing something with that.,,,,

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